full-line industrial catalog - turtle

UNIVERSALENERGY | ENVIRONMENTAL

Blower Silencers

Absorptive Silencers

Vent/Fan Silencers

Separator Silencers

Engine Silencers

Industrial Filters & Filter/Silencers

Accessories

FULL-LINE INDUSTRIAL

CATALOG

General Information 1.1

Blower Silencers 2.1

Absorptive Silencers 3.1

Vent Silencers 4.1

Industrial Fan Silencers 5.1

Vacuum Pump Liquid Separator-Silencers

6.1

Engine Exhaust Silencers 7.1

Filters and Filter-Silencers 8.1

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

Tabl

e of

Con

tent

s

Table of ContentsFull-Line Catalog

NoteAll dimensions in inches and weights in pounds, unless otherwise indicated.

12

34

56

78

ww

w.b

abco

ck.c

om/u

nive

rsal

1.11.1

General Information G

ener

al

Info

rmat

ion

21

34

56

7

ww

w.b

abco

ck.c

om/u

nive

rsal

8

Company Profile

Babcock & Wilcox Universal (B&W Universal) is a global provider of custom-engineered ancillary equipment and solutions to the power generation, oil and gas, industrial processing, rail transportation and backup power markets. For more than half a century, OEMs, EPCs, packagers and end-users have relied on B&W Universal to engineer acoustic and emission/filtration systems to meet their specific needs.

Our comprehensive single-sourced solutions meet environmental, regulatory and operational requirements and help operators reduce costs, improve the efficiency of equipment, and achieve safety and compliance targets. We offer a systems portfolio featuring exhaust and inlet systems, including silencers, ducts, structural steel, dampers/diverters and filters for gas turbines, and diesel and natural gas engines.

We’ve been custom-engineering and perfecting ancillary equipment and solutions for more than a half century for both new and retrofit projects. We bring proven global experience with custom-designed systems installed on all major turbine brands. And we help customers around the world with applications from 5 megawatts to as large as several hundred megawatts meet clean, quiet air regulations safely and efficiently.

B&W Universal manufactures a complete line of noise control and air filtration solutions for industrial processing within a wide range of industries, delivering thousands of quality components to the industrial power market each year. Whether your processing needs require standard silencing, custom silencing or filtration, we are your single source for a complete solution.

Silencer Sizing

Proper silencer sizing requires the following information:

A exhaust flow rate (m3/sec)

B silencer inlet size (mm2)

C level of silencing required

Calculate exhaust gas velocity by dividing the flow rate by the pipe area:

Reference the pressure drop curve in the silencer spec sheets. Using the calculated exhaust gas velocity, find the corresponding estimated pressure drop on the curve. If you have selected a silencer that achieves your silencing level requirements at an acceptable pressure drop level, you have identified the silencer that is right for you!

Selection Assistance

If you need help with silencer selection and sizing, please contact your nearest B&W Universal office. A list of locations and phone numbers are available from our website at: www.babcock.com/universal or you can call: +1-888-300-4272.

Notes

Keep in mind that silencers are not designed to support their weight from the inlet or outlet tube, or support other components of the exhaust system, such as stacks. For the most efficient operation of all silencing units, proper mounting attachments are required. Domed heads or flat plates with gussets vary by model and size.

exhaust flow rate (m3/sec)

silencer inlet pipe area (m2)

Rotary Positive BlowersThe Rotary Positive Blower is a two impellercompressor that delivers a large quantity ofgas or air relative to the individual pulses.Blower capacities are expressed in CFM atinlet conditions (ICFM). Blower size is usuallyexpressed as gear diameter by rotor length.Pitch Line Velocity (PLV) is the peripheralvelocity of the timing gear—equal to theproduct of the gear circumference and therotative speed of the blower, usuallyexpressed in feet per minute (FPM).

The blower presents two problems:1) pulsation within the piping system and,2) noise radiation in the vicinity of the blowerand piping.

The importance of these relative to each otheris a function of blower size and speed; bothincrease proportionately to the blower sizeand the square of the speed.

Pulsation is more pronounced on thedischarge side. Peak pulse pressures are quitesevere and can result in unsilenced dischargesound power levels up to 140–145 dB. Theinlet, although producing less severe pulsationand noise, receives equal attention since theinlet is usually open to atmosphere and thenoise much more apparent.

SilencersThere is little question that silencers are anecessity on any blower installation.Regardless of the size or speed of the blower,silencers of some type are nearly always used.

In the selection of blower silencers, there aretwo basic considerations: 1) the silencer mustbe the correct size (i.e., sufficient capacity forthe volume flow) and, 2) the silencer must bethe proper type for the application. Thenominal silencer size need only be based onthe gas volume, (i.e., the CFM of the gas orair at the operating conditions). However, thesilencer (design) must be selected withconsideration of the blower size andoperating speed. Complete application andcapacity information is given on page 2.3.

There are two types of silencers commonlyused on positive blowers: a reactive typesilencer which consists of a series ofexpansion chambers having interconnecting

tubes, a more sophisticated silencer design. is the combination chamber-absorptive type. This combination silencer is similar to the reactive type with the exception that an acoustically-packed, sound absorbing section is included, comprising an extension of the silencer connection closest to the blower. The inlet of a discharge silencer and the outlet of an inlet silencer are the ends having the packed section.

A third basic type of silencer—the simple, straight-through packed type—is occasionally used on blowers. This type of silencer is usually used on small, high speed machines which characteristically produce significant high frequency noise and relatively mild pulsations.

The PLV is normally the criterion for silencer type selection. If the blower is operating in the critical PLV range, it will generate objectionable high frequency noise which may cause shell ring or tank hammer in the piping and silencer. These critical PLV conditions will always require a combination chamber-absorptive silencer for satisfactory results.

Inlet SilencersFor inlet service, a PLV of 3,300 ft/min or greater is considered critical. This transition speed is empirically established and is somewhat arbitrary, however, it is commonly accepted that blowers operating at or above 3,300 ft/min are considered critical for the purpose of inlet silencer application. Those operating below 3,300 ft/min are considered subcritical. Subcritical PLV applications can usually be silenced adequately with a chamber-type silencer, such as B&W Universal URB or UCI Series. Blowers operating above the critical PLV of 3,300 ft/min will invariably require the RIS Series combination chamber-absorptive type silencer. Inlet Filters or Filter Silencers are commonly used on blower inlets, either individually or in series with a separate inlet silencer. Please reference the Filters and Filter Silencers section of this catalog for further information.

Discharge SilencersFor the more severe discharge conditions of typical blower installations, a PLV of2,700 ft/min is accepted as the critical transition speed. Blowers operating below 2,700 ft/min are considered subcritical and can usually be adequately silenced on the discharge side by use of a chamber-type silencer UCD or URD Series. Machines operating above the 2700 ft/min transition speed will require combination chamber-absorptive silencers such as SD or RD Series.

In some larger blower installations, piping requirements or space restrictions may preclude the use of a large, single discharge silencer such as the SD or RD Series.

Where two or more blowers discharge into a common header, individual silencers upstream of the header are required to subdue the individual blower pulsations. Otherwise, the pulsations tend to beat with each other and can be extremely objectionable.

Note: Silencers should be mounted as close to the blower as possible since any piping between the blower and silencer will radiate noise. Standard silencer connections are not designed to carry external piping or valve loads, so good piping support practices should be used to prevent stresses that cause fatigue and eventual fracture of the silencer or piping. It is also good practice to isolate the blower from the silencer with a flexible expansion joint. Contact B&W Universal for special design considerations where loading is a factor.

Attenuation CurvesNoise attenuation curves are given for the various models within this section. The curves represent insertion loss of airborne noise for typical applications under average conditions. It is not feasible to chart the expected performance of a silencer over a wide range of applications and conditions, therefore, the curves must be used with discretion. Structure-borne noise (see above) may be a consideration and will require separate analysis, since it is not airborne noise and not used for silencer performance rating.

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.1Bl

ower

Sile

ncer

s1

23

45

67

82.1

GeneralInformationBlower Silencers

In a closed blower discharge system,structure-borne noise—such as that radiatedby pipe wall and silencer shell—may be aconsideration, particularly where a stringent,close-proximity noise specification applies. For these applications, various means areavailable to treat the pipe and shell radiatednoise, such that most reasonablespecifications may be met.

For instance, it is possible to lag the silencer

shell externally and reduce any shell noise contribution to below the casing and mechanical noise of the blower and driving machinery.

B&W Universal invites your inquiries concerning special applications where EPA, OSHA or other noise specifications apply. Special applications are handled on an individual basis and recommendations are made according to specific requirements of the installation.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.2

Blow

er S

ilenc

ers

13

45

67

8

2.2

2

GeneralInformation

Rotary Positive Blowers

The silencers shown below are more fullydescribed on the individual catalog pages.These units are designed specifically for useon Rotary Positive Blowers.

There are fundamental similarities betweenblower silencers and other types, particularlyreciprocating engine silencers, which alsorequire a silencer design that provideseffective pulse control as well as noise

attenuation. However, blower silencersgenerally must be constructed moreruggedly to withstand prolonged exposure tosevere pulsations produced by the blower.

All silencers described are of standard withend in, end-out design. Low or high sideinlet and outlet connections are availableand are described on the individual catalog pages.

UCI SeriesInlet SilencerChamber-type inlet silencer for use on sub-critical PLV applications. Available in pipe sizes 8"–14". Smaller sizes use URB Series. Available with side connections and mounting brackets.

RIS SeriesInlet SilencerCombustion chamber-absorptive type inlet silencer for critical PLV applications. Available in pipe sizes 2"–16". Low or high side outlet and mounting brackets available on most sizes.

UCD SeriesURB/URD SeriesDischarge SilencersChamber-type discharge silencer for use on sub-critical PLV applications. Available in pipe sizes 8"–14". (Smaller sizes use URB Series). Low, high, or opposed side connections and mounting brackets available.

SD SeriesRD SeriesDischarge SilencersCombination chamber-absorptive type discharge silencers for critical PLV applications. Available in pipe sizes 4"–14". Low, high, or opposed side connections and mounting brackets available on most sizes.

Accessories,Special Features

Mounting BracketsInspection OpeningsPressure Vessel Construction

Oversize FlangesSpecial FinishesSpecial Materials

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.3Bl

ower

Sile

ncer

s1

23

45

67

82.3

Transition Speed-RPM

Application,Capacity,Pressure Drop DataBlower Silencers

BlowerGear Size Inlet Discharge

22¹⁄₂

345678

1012141618202224

6,3005,0404,2003,1502,5202,1001,8001,5751,2601,050

900785700630570525

5,1554,1253,4352,5752,0601,7201,4701,2901,030

860735645570515470430

Blower Transition Speed1

Pitch LineVelocity

BelowTransition

InletSilencer

UCI, URB

DischargeSilencer

URB, UCD,URD

AboveTransition RIS SD, RD

Silencer Model Specifications2

! "!P = V4005

2c

!P ! ! " c " "V4005

P14.7

530T

Silencer RecommendationsAs mentioned on page 2.1 pitch line velocity(PLV) is the speed of the timing gear in feetper minute (ft/min). For purposes of silencerapplication. PLV is considered “critical” at3,300 ft/min for intake and 2,700 ft/min fordischarge.

Table 1 gives transition speeds in RPM.Blowers running at these speeds or greaterwill have critical PLV. Operating speeds belowtransition will be in the sub-critical range.Blowers operating in the sub-critical speedrange usually require only simple chamber-type silencers while those in the critical rangerequire combination chamber-absorptive typesilencers. If there is doubt, it is best to usethe combination-type silencers. When gearsize and operating speeds are known, theproper type silencer is easily selected.

Silencer Size Selection, CapacityTable 3 gives the nominal capacity of thevarious size silencers. “Size” in this tablerefers to the silencer “nominal size,” or its“inlet size.” Capacities are expressed in inletCFM (ICFM), thus, discharge silencers arerated at higher capacities than inlet silencerssince the air is compressed to reducedvolume at the discharge operating pressure.

A From Table 1 determine whether blowerRPM is above or below the transitionspeed for critical PLV.

B Consult Table 2 for recommendedsilencer models.

Pressure DropThe following formulas may be used tocalculate pressure drop through thesilencers covered in this catalog.

Inlet:

(assumes silencer inletis open to atmosphere)

Discharge:

!P = pressure drop through silencer,inches of water

V = air velocity through silencer,ft/min*

c = individual silencer restrictioncoefficient—empirical constant(see Table 4)

P = discharge pressure, PSIA(operating pressure in PSIG + 14.7)

T = discharge temperature, ˚Rabsolute (operating temperature in˚F + 460)

* To calculate velocity through silencer, divide flow inACFM by cross-sectional area of silencer inlet diameterin square feet.

2

Size

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

1012141618202224262830

Est Temp.

3070

120190270370480750

1,0801,9203,0004,3005,9007,7009,700

12,00014,50017,30020,30023,50027,000

70˚F

3580

140220320430560880

1,2602,2503,5205,0706,8909,000

11,40014,00017,00020,20023,80027,60031,700115˚F

4085

150235335455600935

1,3402,3903,7305,3707,3109,550

12,10014,90018,10021,50025,20029,30033,600140˚F

4090

160245355480630985

1,4102,5103,9305,6607,700

10,00012,70015,70019,00022,60026,60030,80035,400165˚F

4095

165255370505660

1,0301,4802,6304,1105,9208,060

10,50013,30016,40019,90023,70027,80032,20037,000190˚F

45105185285415560735

1,1501,6502,9404,5906,6008,990

11,80014,90018,40022,20026,40031,00036,00041,300240˚F

Silencer Capacity3

Inlet Silencer4 PSIG

Discharge Silencer

Capacity (Inlet CFM 14.7 PSIA at 70˚F)

6 PSIG 8 PSIG 10 PSIG 15 PSIG

URB, URBYUCI, UCIY, UCIHRIS, RISY, RISHUCD, UCDYURD, URDY, URDHSD, SDY, SDHRD, RDY, RDHRDS, SDS, URDS

4.24.24.24.24.24.24.27.0

Model Pressure DropCoefficient (C)

Pressure Drop Coefficients4

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.4

Blow

er S

ilenc

ers

13

45

67

8

2.4

2

SpecificationsUCI Group

Chamber TypeInlet Silencer

40

50

63 125 250 500 1K 2K 4K 8K

30

Octave Band Center Frequency, Hz

Attenuation, dB

Typical Attenuation Curve

10

0

20

The UCI Series Inlet Silencer is a heavy duty, all welded unit offering standard attenuation. Silencers are constructed of carbon steel, designed to provide long service life. The UCI Series is designed for pulse control and silencing for most subcritical PLV applications.

Silencers are designed for either vertical or horizontal mounting. Designs will allow for low or high side outlets for mounting flexibility. Low side outlet versions are designated as “UCIY” and the high side outlet versions are designated as “UCIH.”

DrainP

N

N

L H D

K

Y

K

Y

UCI Series UCIY Series(Low Side Outlet)

UCIH Series(High Side Outlet)

Exterior surfaces are coated with rust inhibitive primer, and may be finish coated in the field if required. Other coating options are available upon request. Brackets and other mounting options are also available. Silencers with connection sizes of 8” and above are equipped with 125/150 ANSI Drilled Plate Flanges.

PartNumber D L N H K

Min Max

P(Size)

Min Max

UCIY UCIH

Y

Weight

Chamber Type Inlet Silencers

Sizes 1"–6" Use URB Series (page 2.7)

Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions.

53-108-AA53-110-AA53-112-AA53-114-AA

22263030

45¹⁄₂

6980¹⁄₂

250360550

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

101214

61748799

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

54678092

14¹⁄₂

16¹⁄₂

18¹⁄₂

911

13¹⁄₂

2127

40

28¹⁄₂

34¹⁄₂

47¹⁄₂ 650

57413412¹⁄₂18¹⁄₂

For silencer sizes 6” and below, use the URB Series.For silencer inlet sizes above 14” please contact B&W Universal for price and availability.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.5Bl

ower

Sile

ncer

s1

23

45

67

82.5

SpecificationsRIS GroupCombination Chamber-Absorptive TypeInlet Silencer

PartNumber D L N H

54-102-AA54-125-AA54-103-AA54-135-AA54-104-AA54-105-AA54-106-AA54-108-AA54-110-AA54-112-AA54-114-AA54-116-AA

888

101012141822263036

28¹⁄₂

333939¹⁄₂

4557¹⁄₂

64728598

111113

33333333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

22¹⁄₂

273333¹⁄₂

3951¹⁄₂

58657891

104106

8¹⁄₂

9101112¹⁄₂

15¹⁄₂

1721¹⁄₂

25¹⁄₂

29¹⁄₂

3035¹⁄₂

————

14¹⁄₂

17¹⁄₂

2026¹⁄₂

32¹⁄₂

384049¹⁄₂

————

2¹⁄₄

2³⁄₄

3¹⁄₄

4567¹⁄₂

0

FIXED AT 6FIXED AT 7FIXED AT 7FIXED AT 8

7¹⁄₂

99

1213¹⁄₂

1516¹⁄₂

18¹⁄₂

16¹⁄₂

2325¹⁄₂

30¹⁄₂

37445051

P(Size)

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416

RISY RISH

KE

Min Max

RISYY

Weight

252530405080

110190380550800

1,050

Combination Chamber-Absorptive Type Inlet Silencers

Sizes 1"–1¹⁄₂" use U5 Series (page 3.2)

The RIS Series Inlet Silencer is a heavy-duty, all-welded unit offering premium attenuation. Silencers are constructed of carbon steel, designed to provide long service life. The RIS Series is designed for pulse control and silencing for most Critical PLV Applications.

Silencers are designed for either vertical or horizontal mounting. A low side outlet version is designated RISY Series. Both the RIS and RISY Series Silencers have the same performance characteristics.

P

N

N

L H D

K

Y


*Specify -TT for male pipe threaded units.

40

50

63 125 250 500 1K 2K 4K 8KOctave Band Center Frequency, Hz

Attenuation, dB


30

10

0

20

RIS Series RISY Series(Low Side Outlet)

Silencers with connection sizes of 3-1/2” and smaller are offered with MaleNPT Threaded connections. Silencerwith connection sizes of 4 and 5” areavailable with either NPT male threads,or flanges. Silencer connections of 6”and above are equipped with 125/150ANSI Drilled Plate Flanges. Exteriorsurfaces are coated with a rustinhibitive primer, and may be finishcoated in the field if required. Othercoating options are available uponrequest. Brackets and other mountingoptions are also available.

**

For inlet sizes below 2” please refer to the U5 Series.For connection sizes above 16” please contact B&W Universal for price and availability.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.6

Blow

er S

ilenc

ers

13

45

67

8

2.6

2

SpecificationsUCD Group

Chamber TypeDischarge Silencer

The UCD Series Discharge Silencer is a heavy duty, all welded unit offering standard attenuation. Silencers are constructed of carbon steel, providing long service life. The UCD Series is designed for pulse control and silencing for most Sub Critical PLV Applications. For Premium Grade Silencing, please refer to the URD Series.

The UCD Series is the basic End-in, End-out configuration. A low side inlet version is offered as the UCDY Series. Silencers are designed for either vertical or horizontal mounting. Silencers with connection sizes of 8” and above are equipped with 125/150 ANSI drilled plate flanges.

PartNumber D L N H K

56-108-AA56-110-AA56-112-AA56-114-AA

22263030

61748799

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

54678092

14¹⁄₂

16¹⁄₂

18¹⁄₂

18¹⁄₂

P(Size)

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

101214

Min

91112¹⁄₂

13¹⁄₂

Max

Y

21273440

Weight

250360550650

Chamber Type Discharge Silencers

DrainP

N

N

L H D

K

Y

Sizes 1"–6" use URB Series (page 2.7)


40

50


Attenuation, dB


30

10

0

20

UCD Series UCDY Series(Low Side Inlet)

Exterior surfaces are coated with rust inhibitive primer, and may be finish coated in the field if required. Additional coating options are available upon request. Brackets and other mounting options are also available.

For connection sizes below 8” please refer to the URB Series.For connection sizes above 14” please contact B&W Universal for price and availability.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.7Bl

ower

Sile

ncer

s1

23

45

67

82.7

SpecificationsURB GroupURD GroupChamber TypeDischarge Silencer



PartNumber D L N H

55-101-AA55-115-AA55-102-AA55-125-AA55-103-AA55-135-AA55-104-AA55-105-AA55-106-AA55-108-AA55-110-AA55-112-AA55-114-AA

4¹⁄₂

6¹⁄₂

810101214161822263036

21243334465253657297

122135161

2233333333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

17202728404647596690

115128154

——7889

10111214¹⁄₂

16¹⁄₂

18¹⁄₂

21¹⁄₂

——

66¹⁄₂

89

1112¹⁄₂

14¹⁄₂

——

2229324863¹⁄₂

6981

—————————82

106117¹⁄₂

141

—————————6276¹⁄₂

88107

——————89

10121415¹⁄₂

17¹⁄₂

K

Min

URBY, URDY URDH URDS

Y

Max Min Max Min Max

Weight

——————

1619222940¹⁄₂

4249

10152030405570

120160370550800

1,250

Chamber Type Discharge Silencers

The URB/URD Series Discharge Silencer is a heavy duty, all welded unit offering premium attenuation. Silencers are constructed of carbon steel, providing long service life. The URB/URD Series is designed for pulse control and silencing for most subcritical PLV applications.

The URB/URD Series is the basic end-in, end-out configuration. A low side inlet (URBY/URDY), high side inlet (URDH), and opposed connections (URDS) versions are available providing added mounting and piping flexibility. Silencers are designed for either vertical or horizontal mounting. Silencers with connection sizes of 8” and above are equipped with 125/150 ANSI drilled plate flanges.

P

N

N

L H D

P(Size)

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

101214

K

Y

K

Y

K

Y

K

Note: Connection sizes of 1” – 6” are designated as URB Series. Sizes 8” and larger are designated as URD Series. Both the URB and URD Series are fundamentally the same in design and the performance characteristics are identical.


40

50


Attenuation, dB


30

10

0

20

URB,URD Series

URBY,URDY Series(Low Side Inlet)

URDH Series(High Side Inlet)

URDS Series(Opposed Connections)

Connection sizes of 3-1/2” and smaller are offered with male NPT pipe threads. Connection sizes of 4” and 5” are available with either male NPT thread or 125/150 ANSI drilled plate flanges. Exterior surfaces are coated with rust inhibitive primer, and may be finish coated in the field if required. Other coating options are available upon request. Brackets and other mounting options are also available.

**

For connection sizes above 14” please contact B&W Universal for price and availability.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.8

Blow

er S

ilenc

ers

13

45

67

8

2.8

2



SpecificationsSD Group

Combination Chamber-Absorptive Type

Discharge Silencer

The SD Series Discharge Silencer is a heavy duty, all welded unit offering standard attenuation. Silencers are constructed of carbon steel, designed to provide long service life. The SD Series is designed for pulse control and silencing for most critical PLV applications. For the most demanding pulse applications, the RD group of silencers may be required.

Silencers are designed for either vertical or horizontal mounting. Designs will allow for low or high side inlets for mounting flexibility. A low side inlet version is designated SDY Series. The high side inlet configuration is designated as SDH Series. The opposed connection version is designated as the SDS Series. All versions have the identical performance characteristics.

DrainP

N

N

L H D

K

Y

E

K

Y

KB

Y

Acoustical packing is suitable for 325˚F

P(Size)

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

101214

Part Number

54-102-AA54-125-AA54-103-AA54-135-AA54-104-AA*54-105-AA*54-106-AA54-108-AA54-110-AA54-112-AA54-114-AA

D

888

1010121418222630

L

28¹⁄₂

333939¹⁄₂

4557¹⁄₂

64728598

111

N

33333333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

H

22¹⁄₂

273333¹⁄₂

3951¹⁄₂

58657891

104

K

8¹⁄₂

9101112¹⁄₂

15¹⁄₂

1721¹⁄₂

25¹⁄₂

29¹⁄₂

30

————

14¹⁄₂

17¹⁄₂

2026¹⁄₂

32¹⁄₂

3840

SDY SDH SDS

————

14¹⁄₂

17¹⁄₂

2026¹⁄₂

32¹⁄₂

3840

B

————89

1012¹⁄₂

14¹⁄₂

16¹⁄₂

18¹⁄₂

E

————2¹⁄₄

2³⁄₄

3¹⁄₄

4567¹⁄₂

Min

SDY

Min

————7¹⁄₂

99

1213¹⁄₂

1516¹⁄₂

Max

Max

————16¹⁄₂

2325¹⁄₂

30¹⁄₂

374450

Min

SDS

Min

————7¹⁄₂

9101213¹⁄₂

1516¹⁄₂

Max

Max

————9¹⁄₂

12¹⁄₂

15¹⁄₂

16¹⁄₂

182425

Min

SDH

Min

————30¹⁄₂

4043¹⁄₂

49¹⁄₂

61¹⁄₂

6981

Max

Max

————32¹⁄₂

43¹⁄₂

495465¹⁄₂

7789¹⁄₂

Weight

152530405080

110190380550800

Y

Combination Chamber-Absorptive Type Discharge Silencers

40

50


Attenuation, dB


30

10

0

20

SD Series SDY Series(Low Side Inlet)

SDH Series(High Side Inlet)

SDS Series(Opposed Connection)

Silencers with connection sizes of 2” to 3-1/2” are offered with male NPTthreaded connections. Silencers withconnection sizes of 4” and 5” areavailable with either NPT male threads,or drilled plate flanges. Silencerconnections of 6” and above areoffered with 125/150 ANSI drilled plateflanges. Exterior surfaces are coatedwith a rust inhibitive primer, and maybe finish coated in the field if required.Other coating options are availableupon request. Brackets and othermounting options are also available.

Sizes 1" and 1¹⁄₂" use URB Series (page 2.7)

For silencers with connection sizes from 1” through 2” use the URB Series.For silencers with connections larger than 14” please contact B&W Universal for price and availability.

ww

w.b

abco

ck.c

om/u

nive

rsal

Y

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.9Bl

ower

Sile

ncer

s1

23

45

67

82.9



SpecificationsRD GroupCombination Chamber-Absorptive TypeDischarge Silencer

The RD Series Discharge Silencer is a heavy duty, all welded unit offering premium attenuation. Silencers are constructed of carbon steel, designed to provide long service life. The RD Series is designed for maximum pulse control and silencing for the most demanding Critical PLV Applications.

Silencers are designed for either vertical or horizontal mounting. Designs will allow for low or high side inlets for mounting flexibility. A low side inlet version is designated as “RDY” Series, and the high side inlet configuration is designated as “RDH” Series. The opposed connection version is designated as the “RDS” Series. All versions have identical performance characteristics.

DrainP

N

N

L H D

K

Y

E

K

Y

KB

Y

Combination Chamber-Absorptive Type Discharge Silencers

Acoustical packing is suitable for 325˚F

40

50


Attenuation, dB


30

10

0

20

RD Series RDY Series(Low Side Inlet)

RDH Series(High Side Inlet)

Silencers with connection sizes of 3-1/2” and smaller are offered with male NPT threaded connections. Silencers with connection sizes of 4” and 5” are available with either NPT male threads, or flanges. Silencer connections of 6” and above are provided with 125/150 ANSI Drilled Plate Flanges. Exterior surfaces are coated with rust inhibitive primer, and may be finish coated in the field if required. Other coating options are available upon request. Brackets and other mounting options are also available.

RDS Series(Opposed Connection)

P(Size)

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

101214

Part Number

57-102-AA57-125-AA57-103-AA57-135-AA57-104-AA*57-105-AA*57-106-AA57-108-AA57-110-AA57-112-AA57-114-AA

D

810101214161822263036

L

3334435253657297

122135161

N

33333333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

H

2728404647596690

115128154

K

910101114¹⁄₂

16¹⁄₂

20¹⁄₂

24¹⁄₂

28¹⁄₂

3540¹⁄₂

————

161822¹⁄₂

28¹⁄₂

344247¹⁄₂

RDY RDH RDS

————

14¹⁄₂

16¹⁄₂

20¹⁄₂

263239¹⁄₂

45¹⁄₂

B

————

10111214¹⁄₂

16¹⁄₂

18¹⁄₂

21¹⁄₂

E

————44¹⁄₂

5678

10¹⁄₂

RDY

Min

89

10121415¹⁄₂

17¹⁄₂

Max

2026¹⁄₂

304560¹⁄₂

6678

RDS

Min

————89

10121415¹⁄₂

17¹⁄₂

Max

————

1416¹⁄₂

202637¹⁄₂

3946

RDH

Min

————3343¹⁄₂

466579¹⁄₂

91110

Max

————39515679

103114¹⁄₂

138

Weight

2535406080

130160410600900

1,400

Sizes 1"–1¹⁄₂" use URB Series (page 2.7) or use U5 Series: (page 3.2)


For connection sizes below 2” please refer to the URB Series Silencers.For connection sizes above 14” please contact B&W Universal for price and availability.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.10

Blow

er S

ilenc

ers

13

45

67

8

2.10

2

SURS Series blower silencers are heavy duty, all welded steel construction, suitable for either inlet or discharge applications. The SURS series is designed for application to blowers operating above critical transition speed. As a result, there is no acoustical packing in these silencers. These silencers incorporate a unique high performance, three chamber system which utilizes a diffuser on the blower side of the silencer. The SURS Series provides excellent pulse control, and is designed for the most demanding conditions.

Connection sizes smaller than 4" are provided with standard NPT male pipe nipples. Silencers with connection sizes of 4" and larger have 125/150 ANSI drilled plate flanges.

The SURS is a basic end-in, end-out configuration. A low side inlet version is available as the SURSY Series. Both the SURS and SURSY versions are similar in gas flow path offering identical performance.

DrainP

N

N

L H D

K

Y

SURS Series SURSY Series(Low Side Inlet)

The SURS and SURSY Series silencers come with a high heat aluminum paint system. Other paint systems are available upon request.

Model

SURS SURSY

Part Model Part

YP D L N H

K Min. Max Weight

SURS-2SURS-2.5SURS-3SURS-3.5SURS-4SURS-5SURS-6SURS-8SURS-10SURS-12SURS-14

55-A02-SS55-A25-SS55-A03-SS55-A35-SS55-A04-SS*55-A05-SS*55-A06-SS55-A08-SS55-A10-SS55-A12-SS55-A14-SS

SURSY-2SURSY-2.5SURSY-3SURSY-3.5SURSY-4SURSY-5SURSY-6SURSY-8SURSY-10SURSY-12SURSY-14

55-B02-SS55-B25-SS55-B03-SS55-B35-SS55-B04-SS*55-B05-SS*55-B06-SS55-B08-SS55-B10-SS55-B12-SS55-B14-SS

22¹⁄₂

33¹⁄₂

4568

101214

1212121414*16*1826303636

40404659597172

111136138168

33333333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

34344053536566

104129131161

999

1010111216¹⁄₂

18¹⁄₂

21¹⁄₂

21¹⁄₂

4¹⁄₂

4¹⁄₂

55¹⁄₂

678

10121416

1313152020252541515063

55556090

100160200520810

1,1301,400

SpecificationsSURS Group

Chamber Type Multi-Use Silencer

40

50


Attenuation, dB


30

10

0

20

Combination Chamber Type Multi-Use Discharge Silencers


For silencer connections above 14" please contact B&W Universal for price and availability.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

2.11Bl

ower

Sile

ncer

s1

23

45

67

82.11

Accessories andOptional FeaturesUCI, RIS, ICD IRB, IRD, SD, RD,and SURS Blower Silencers

In addition to the standard accessories shown here, other special features such as special materials and finishes will be quoted on request. Contact B&W Universal with your specific requirements.

Mounting BracketsMounting Brackets or legs are available for any of the silencers in this section.Saddle type brackets for horizontal mountand angle legs for vertical mount arestandard. See Spec. Sheet No. 1078. Special design brackets will be quoted withyour specifications.

Inspection OpeningsInspection Openings with bolted andgasketed cover plates are available installedat the time the silencer is fabricated. Theyare designed to withstand the usual range ofpressure encountered with blowers. Oneinspection opening is usually installed ineach silencer chamber for cleaning orinspection. Standard sizes include:3"" 4", 4"" 6", 6"" 8".

Pressure Vessel ConstructionAll silencers shown in this catalog may befabricated in accordance with Div. 1,Section VIII—ASME Code for UnfiredPressure Vessels. Dimensions are similarto standard models, but material types andthicknesses are selected to meet coderequirements. Prices are quoted onapplication to meet your pressure andtemperature conditions.

Oversize FlangesFrequently the blower flange size is largerthan the required silencer’s connection.Rather than use a larger silencer, it isusually more economical to use an oversizereducing flange on the silencer. This is theconventional piping practice and may beused on either inlet or discharge silencers.Example: a 10" flange size silencer hasadequate capacity for a blower with a 12"discharge flange. A flange having a drillingpattern to match the 12" blower flange butwith a 10" bore to match the silencer nozzleis substituted on the silencer inlet.

Two pipe sizes, (e.g. 10" to 14"), is therecommended maximum variation. Priceson request.

Horizontal Vertical

ww

w.b

abco

ck.c

om/u

nive

rsal

CBF/CBFI SeriesCompact Blower

Inlet Filter-Silencer

Filter and silencer combined in one unit. The CBF and CBFI have the acoustic capabilities of the B&W Universal RIS Series silencers and the filtration performance of CC series filters.

Reduced cost, overall package size, weight, storage space, freight cost and damage.

Approximately one third the size of conventional blower silencer, with the added benefit of excellent, high-efficiency filtration.

Reduced overall package noise without further acoustic treatment.

Versatile—Suitable for inlet applications in confined areas, outdoor or indoor, without compromising acoustic or pressure drop performance.

70°F200°F300°F

L

WD

H

DP

K

Y

¹⁄₈" NPTpressure tap

Removable weatherhoodfor filter element access

Y

P

H

L

K

D

WDRemovable plate for filter element access

¹⁄₈" NPTpressure tap

CBF Series (outdoor use) CBFI Series (indoor use)

P (nom.)

CBF/CBFI

22¹⁄₂

34568

1012

D

88

12121616243034

89

1015172324¹⁄₂

35¹⁄₂

39¹⁄₂

44³⁄₄

5¹⁄₄

7¹⁄₂

8¹⁄₂

11¹⁄₂

13³⁄₄

17³⁄₄

19³⁄₄

7799

111115¹⁄₂

18¹⁄₂

20¹⁄₂

120175275500750

1,1002,2003,0004,300

34-702-AA34-725-AA34-703-AA34-704-AA34-705-AA34-706-AA34-708-AA34-710-AA34-712-AA

101016162020303640

13¹⁄₄

14³⁄₄

1721¹⁄₄

26323946¹⁄₂

54¹⁄₂

2025506085

100200305385

34-G02-AA34-G25-AA34-G03-AA34-G04-AA34-G05-AA34-G06-AA34-G08-AA34-G10-AA34-G12-AA

6¹⁄₂

6¹⁄₂

10101212121824

12³⁄₄

14¹⁄₄

16¹⁄₂

20³⁄₄

25¹⁄₄

31¹⁄₄

39¹⁄₄

45³⁄₄

53³⁄₄

2025506085

100185295370

H Y K CFM CAP Part

CBF

WD L Weight Part

CBFI

B L1 Weight

Models, Dimensions, Weights and Elements

Notes: 1. Non-ASME Code construction suitable for 15" Hg vacuum.2. Weights are approximate and do no include the weight of the filter element.

81-0471*81-0471*81-106381-106381-047581-047581-116381-116381-1164

81-1203*81-1203*81-120581-120581-120781-120781-120981-120981-1210

81-1036*81-1036*81-103881-103881-104081-104081-120081-120081-1201

Paper

22¹⁄₂

34568

1012

P (nom.)Element Part Number

Felt Wire

*Pair of elements required (stacked).

Blow

er S

ilenc

ers

13

45

67

82

2.12

40

50


Attenuation, dB


30

10

0

20

DP

K

Y

ww

w.b

abco

ck.c

om/u

nive

rsal

Blow

er S

ilenc

ers

2.13

CB SeriesCompact Blower Silencer

Part Number P (nom.) D L H Y K Weight

56-702-AA56-725-AA56-703-AA56-704-AA56-705-AA56-706-AA56-708-AA56-710-AA56-712-AA

22¹⁄₂

34568

1012

88

12121616243034

1112¹⁄₂

13¹⁄₂

182026313943

89¹⁄₂

10¹⁄₂

15172327¹⁄₂

35¹⁄₂

39¹⁄₂

44³⁄₄

5¹⁄₄

7¹⁄₂

8¹⁄₂

11¹⁄₂

13³⁄₄

17³⁄₄

19³⁄₄

7799

111115¹⁄₂

18¹⁄₂

20¹⁄₂

152535457085

170275355

120187270480750

1,0801,9203,0004,320

Model

CB-2CB-2¹⁄₂

CB-3CB-4CB-5CB-6CB-8CB-10CB-12

CFM CAP

Compact Blower Silencers

Y

PHL

P

D

K

500 1K 1.5K 2K 2.5K 3K 3.5K 4K 4.5K 5K 5.5K0

1

2

3

4

5

6

7

Velocity, ft/min

!P, inches of H

2 O

Pressure Drop Curves

40

50


Attenuation, dB


30

10

0

20

70°F200°F300°F

The B&W Universal CB Series of compact blower silencers are smaller in size when compared to other more conventional styles of blower silencers. The CB Series is used when space is at a premium. These silencers are designed to provide intake or discharge silencing on rotary positive blowers. On average, the CB Series Silencers are about 1/3 the size of conventional silencers, providing savings in cost and weight.

The CB Series silencers utilize an absorbent internal pack suitable for temperatures to 325 F, and pressures up to 15 psig. Flanged or threaded connections are available. Exterior surfaces receive a shop coat of corrosion inhibitive primer.

12

34

56

78

ww

w.b

abco

ck.c

om/u

nive

rsal

UNI-BASEUltra-Wide Base

Plates/ComponentsRotary Positive Blowers

These wide base plate products accommodate a variety of blower package designs. The UNI-BASE package and the USI-BASE base plate use the same basic base plate and discharge silencer. The UNI-BASE package includes the B&W Universal model URBN high-side inlet silencer and CCF inlet air filter, while the UNI-BASE base

plate is only the basic plate and the URBYdischarge silencer. Please see page 2.7 forperformance and sizing information for theURBY series silencers, page 2.15 forinformation on the URBN series silencers,and page 8.9 for performance data, weightsand dimensions of CCF filters.

Blow

er S

ilenc

ers

13

45

67

82

2.14

UNI-BASE Package

UNI-BASE Base Plate Only

CCF (see page 8.9)

URBN (see page 2.15)

URBY (see page 2.7)

URBY (see page 2.7)

Size UNI-BASE Package

22¹⁄₂

3456

80-187380-187480-187580-187680-187780-1878

55-202-ABP55-225-ABP55-203-ABP55-204-ABP55-205-ABP55-206-ABP

55-502-AA55-525-AA55-503-AA55-504-AA55-505-AA55-506-AA

55-202-AA55-225-AA55-203-AA55-204-AA55-205-AA55-206-AA

34-L02-TT*34-L25-TT*34-L03-TT*34-L04-TT*34-L05-TT*34-L06-TT*

Base Plate Only URBN Only URBY Only CCF Only

UNI-BASE Base Plates/Components Part Numbers

*Specify “P” at end of part number for unit with pleated paper elements, “F” for pleated felt or “W” for wire mesh.Refer to page 8.11 for filter element details.

ww

w.b

abco

ck.c

om/u

nive

rsal

UNI-BASEUltra-Wide BasePlates/ComponentsRotary Positive Blowers

P1/P2 (nom.) D1 H1 K1 Y1 Y2 Approx. Weight

22¹⁄₂

3456

81010141618

272840476066

788

101112

677668

3¹⁄₂

4¹⁄₂

4¹⁄₂

5¹⁄₂

6¹⁄₂

7¹⁄₂

25355080

140170

URBN Silencers

CCF Silencers (please see page 8.9)

P (nom.) A B C CD D2 E FS

2

3456

3944¹⁄₂

55¹⁄₂

566666

1¹⁄₂

1¹⁄₂

4———

20³⁄₄

2131¹⁄₂

37¹⁄₂

43¹⁄₂

52

10³⁄₄

11¹⁄₄

1215¹⁄₂

18¹⁄₄

18¹⁄₄

81010141618

6¹⁄₂

6³⁄₄

7¹⁄₂

813³⁄₄

10¹⁄₂

1314¹⁄₄

15¹⁄₄

16¹⁄₂

14³⁄₄

15¹⁄₄

23¹⁄₂

27¹⁄₂

29³⁄₄

333535¹⁄₄

16171724¹⁄₂

23¹⁄₂

26¹⁄₂

56689

10¹⁄₄

788

101112

3031435062¹⁄₂

69

3¹⁄₂

44³⁄₄

61112

212526¹⁄₄

29³⁄₄

30¹⁄₂

30¹⁄₂

677

111212

125170270355500645

G H2 J K2 L Q (Dia.) S YApprox.Weight

UNI-BASE Base Plate (w/URBY)

Dimensions and Weights

Notes: 1. Sizes 2"–3" URBY discharge silencers are shipped standard with male pipe threaded connections. 4" and 5" URBY discharge silencers are shipped standard with malepipe threaded discharge connections and plain pipe blower connections. 6" URBY discharge silencers are shipped standard with flanged discharge connection drilledto 125/152 lb. ANSI specifications and plain pipe blower connections.

2. Sizes 2"–3" URBY discharge silencers have a 2" NPT relief valve coupling and plug. Sizes 4"–6" URBY discharge silencers have a 3" NPT relief valve coupling and plug.3. UNI-BASE base plate kit sizes 2"–4" require gussets.

Notes: 1. Sizes 2"–4" URBN inlet silencers are shipped with male pipe threaded inlets and plain pipe outlets. Sizes 5" and 6" URBN inlet silencers are shipped standard withflanged inlet connections drilled to 125/150 lb ANSI specifications and plain pipe outlets.

Blow

er S

ilenc

ers

2.151

23

45

67

8

2¹⁄₂

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

3.1

Abso

rptiv

eSi

lenc

ers

12

34

56

78

3.1

U5 SeriesPremium grade straight-through silencer available in pipe sizes of ½" to 6". Attenuation is similar to the SUS Series.

U2 SeriesStandard grade straight-through silencer available in pipe sizes 5" to 16". For better performance use SUS, SU4, or SU3 series.

SU5 SeriesPremium grade full-flow annular type silencer available in pipe sizes of 4" to 30".

SU3 SeriesStandard grade annular type silencer with performance one grade below the SUS Series. The SU3 Series is available in pipe sizes 8" to 30". For enhanced performance, use SU4 or SUS series.

Sizing Information, Pressure Drop DataThe flow area through the silencer must be sufficient to accommodate the maximum flow without imposing excessive pressure drop. The following instructions enable the selection of the proper silencer size and determination of actual pressure drop. These instructions assume air as the flowing gas. For other gases, density and other corrections may be necessary—contact B&W Universal for assistance.

Data required:air flow rate (actual CFM)temperature (°F)pressure (psig)maximum pressure drop (inches of water)

2

1 Determine maximum velocity.

V = air or gas velocity, ft/min (see note 1)

!P = maximum pressure drop, inches of water

c = silencer pressure drop coefficient(see Table 1)

T = air temperature, °F (see note 2)P = operating pressure, psig

(If at atmospheric pressure, pressure ratio is unity and may be omitted from equation. If P exceeds 15 psig, contact B&W Universal for recommendations.)

2 Determine flow area required.

A = flow area required, ft2

Q = air flow rate (actual CFM)

3 From Table 2, select size with flow areaequal to or greater than that calculated.

4 Determine actual gas velocity in ft/min.

A = flow area from Table 2

5 Determine actual pressure drop.

c =silencer pressure drop coefficient (see Table 1)

V ! 4005!"""""""# $# $# $14.7P " 14.7

!Pc

T " 460530

QVA !

# $ # $ # $530T " 460

P " 14.714.7

V actual4005

!P ! c

U5, U2SU5SU3, SU4

.25

.75

.85

Silencer Series Pressure DropCoefficient (C)


0.00140.00310.00550.0120.0220.0340.0490.0670.0870.1360.1960.3490.550.791.071.41.82.2

¹⁄₂

³⁄₄

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

101214161820

2.63.13.74.34.95.66.37.17.98.79.6

10.611.512.615.919.623.828.3

222426283032343638404244464854606672

DiameterSize (in)

DiameterSize (in)

Flow Area Size2

Notes

2. Typical attenuation curves indicate the characteristics of the silencer series and are neither a minimum nor a guarantee for an individual silencer. Individual silencer performance can be affected by sound source characteristics including pure tones, flow velocity, adjacent piping and temperature.

The absorptive type silencer is the classic dissipative design that absorbs noise energy by the use of various types of fibrous packing materials. As sound waves pass through the spaces between the tightly packed sound absorbent small diameter fibers, the resulting viscous friction dissipates the sound energy as small amounts of heat.

GeneralInformation

Absorptive Silencers

# $# $T " 460530

14.7P " 14.7Actual CFM ! (Standard CFM)

QAV actual !

Absorbent silencers are very effective on high frequency noise (500-8,000 Hz). At frequencies above and below this range, attenuation is somewhat diminished. Since noise is absorbed by the packing material, absorptive silencers do not rely on internal baffles, tubes, or chambers to achieve noise reduction. As a result absorptive silencers generally utilize a "straight-through" gas flow path that will minimize flow restriction.

B&W Universal Absorptive Series of silencers are listed below.

Flow Area(ft2)

Flow Area(ft2)

1. Since "self noise" and aerodynamic noise" increase with velocity, absorbent silencers are usually sized for 4,000 to 8,000 ft/min. In no case should the velocity exceed 15,000 ft/min. regardless of pressure drop allowed.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

3.2Ab

sorp

tive

Sile

ncer

s1

23

45

67

83.2

PartModel

U5 SeriesStraight-ThroughAbsorptive Silencer

The U5 Series is a premium grade straight-through absorptive silencer which provides excellent noise attenuation due to its high length to diameter ratio. It is especially well suited for inlet applications on small rotary positive, centrifugal blowers, or discharge of vacuum pumps. The U5 Series consists of mild steel construction and enamel paint.

Common Applicationsrotary positive/centrifugal blowersvacuum pump dischargeair valves and cylinderssmall low-pressure ventshigh frequency noise sources

U5-¹⁄₂U5-³⁄₄U5-1U5-1¹⁄₄

U5-1¹⁄₂

U5-2U5-2¹⁄₂

U5-3U5-4U5-5U5-6

11-150-AA11-170-AA11-101-AA11-121-AA11-115-AA11-102-AA11-125-AA11-103-AA11-104-AA11-105-AA11-106-AA

¹⁄₂

³⁄₄

11¹⁄₄

1¹⁄₂

22¹⁄₂

3456

3¹⁄₄

3¹⁄₄

3¹⁄₄

3¹⁄₄

4¹⁄₄

5¹⁄₈

6¹⁄₈

6⁵⁄₈

81012

811141619³⁄₄

2633¹⁄₂

36¹⁄₂

48⁷⁄₈

5763

————¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₈

33

811141618⁷⁄₈

2532¹⁄₂

35¹⁄₂

48³⁄₄

5157

23346

1015204060

100

P D L N H Weight

4045

63 125 250 500 1K 2K 4K 8K

105

15

0

20253035


Attenuation, dB


NoteU5 series standard paint and acousticalpacking are suitable for 325°F.

N N

P P

HL

D

Absorptive Material

Straight-Through Absorptive Silencer

Sizes ½" through 1-1/4" are constructed with one-piece tapped heads. The tapped opening is approximately flush with the end of the shell.Sizes ½" through 4" utilize female NPT pipe connections.Sizes 5" and 6" utilize 125/150 ANSI drilled plate flanges.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

3.3

Abso

rptiv

eSi

lenc

ers

12

34

56

78

3.3

U2 SeriesStraight-Through

Absorptive Silencer

The U2 Series is an intermediate grade straight-through absorptive silencer. The U2 Series utilizes a lower length to diameter ratio. The U2 Series consists of mild steel construction with primer coated exterior.

Common Applicationsintermediate size rotary positive blower inletcentrifugal blower inlet or discharge intermediate size dry vacuum pump dischargegas turbine inlethigh-speed centrifugal compressor inlethigh frequency noise sources

PartModel

U2-5U2-6U2-8U2-10U2-12U2-14U2-16

10-105-AA10-106-AA10-108-AA10-110-AA10-112-AA10-114-AA10-116-AA

568

10121416

10121416182022

364053657789

101

333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

30344658708294

4570

105160220340440

P D L N H Weight

4045

63 125 250 500 1K 2K 4K 8K

105

15

0

20253035


Attenuation, dB


Note:U2 series standard paint and acousticalpacking are suitable for 325°F.

N NHL

DP P

Absorptive Material

Straight-Through Absorptive Silencer

For inlet sizes above 16" please contact B&W Universal for price and availability.

Sizes ½" through 1-1/4" are constructed with one-piece tapped heads. The tapped opening is approximately flush with the end of the shell.Sizes ½" through 4" utilize female NPT pipe connections.Sizes 5" and 6" utilize 125/150 ANSI drilled plate flanges.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

3.4Ab

sorp

tive

Sile

ncer

s1

23

45

67

83.4

SU SeriesAnnular FlowAbsorptive Silencer

SU5 SeriesThe SU5 Series is a premium grade annular flow absorptive silencer. The design consists of two concentric perforated cylinders lined with acoustical packing. The two concentric cylinders form an annular flow path with blocked line of site to provide full flow area for low resistance. The SU Series comes standard with carbon steel construction and primer coated exterior.

SU3 SeriesThe SU3 Series is a standard grade annular flow absorptive silencer. The design consists of two concentric perforated cylinders lined with acoustical packing. The two concentric cylinders form an annular flow path with partial blocked line of site to provide full flow area for low resistance. The SU3 Series comes standard with carbon steel construction and primer coated exterior.

Common ApplicationsInlet and discharge of high speed low pressure centrifugal compressors and blowers less than 15 psig

Industrial fan inlet and discharge

High pressure centrifugal compressors inlet

Gas turbine inlet

Dry vacuum pump discharge

Some low pressure vents less than 15 psig

High frequency noise sources

Inlet of turbocharged reciprocating engines

Note:SU Series standard paint and acousticalpacking are suitable for 325°F.

N NHL

DP

All sizes furnished with flanged connections to match 125#/150# ANSI drilling.

P

Absorptive Material

SU3 and SU5 Series silencers are available in sizes from 4" through 30" inlets. For sizes larger than 30" please contact B&W Universal for price and availability.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

3.5

Abso

rptiv

eSi

lenc

ers

12

34

56

78

3.5

SU SeriesAnnular Flow

Absorptive Silencer

Model Part P D L N H Weight

SU5-4SU5-5SU5-6SU5-8SU5-10SU5-12SU5-14SU5-16SU5-18SU5-20SU5-22SU5-24SU5-26SU5-28SU5-30SU3-8SU3-10SU3-12SU3-14SU3-16SU3-18SU3-20SU3-22SU3-24SU3-26SU3-28SU3-30

14-104-AA14-105-AA14-106-AA14-108-AA14-110-AA14-112-AA14-114-AA14-116-AA14-118-AA14-120-AA14-122-AA14-124-AA14-126-AA14-128-AA14-130-AA12-108-AA12-110-AA12-112-AA12-114-AA12-116-AA12-118-AA12-120-AA12-122-AA12-124-AA12-126-AA12-128-AA12-130-AA

4568

10121416182022242628308

1012141618202224262830

101212182024262830363642424848141618202224262830303636

21¹⁄₂

26263644¹⁄₂

5361¹⁄₂

6874788991

10210411531353939474749¹⁄₂

55¹⁄₂

55¹⁄₂

6163¹⁄₂

62

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

15¹⁄₂

20202937¹⁄₂

4654¹⁄₂

61676980829395

10624283232404040¹⁄₂

46¹⁄₂

46¹⁄₂

5254¹⁄₂

53

305560

120195290390500650950

1,0801,4001,5802,2002,600

85120155200270290350420500680830890

SU5

SU3

Typical Attenuation CurveSU5 Series

Typical Attenuation CurveSU3 Series

4045

63 125 250 500 1K 2K 4K 8K

105

15

0

20253035


Atte

nuat

ion,

dB

ww

w.b

abco

ck.c

om/u

nive

rsal

4.1Ro

tary

Pos

itive

Blow

er S

ilenc

ers

4.1Ve

nt S

ilenc

ers

42

13

56

78

4.1

Orde

ring

Info

rmat

ion

HV SeriesCombination Vent Silencers

Versatile SilencersB&W Universal HV Series vent silencers effectively silence high velocity air, steam, gas vents, and blowdown to atmosphere where sonic, or critical conditions exist in the valve. Typical applications include:

Steam boiler relief valvesSuperheater header relief valvesBoiler startup and purgeHigh pressure air vents Natural gas blowdowns Switch valvesCompressor blowoffsAutoclavesSteam ejectors

Standard FeaturesInlet plenum are covered with outer acoustic wrap and lag shell to reduce outer mechanically induced shell noise, and internal flow noise.

Highly absorptive mineral wool acoustic fill material, and heavy gauge perforated face sheets for exceptional attenuation at high frequencies.

Inlet nozzle and diffuser with flanged connections are provided with 150# ANSI drilled plate flanges. Other styles of inlet connections can be provided to meet application requirements.Lifting lugs provided for simple installation.

A bottom drain is provided to reduce or eliminate water entrainment.

Silencers provided with standard high heat aluminum paint. Alternate surface preparation and exterior coatings can be provided to meet specific requirements.

Silencers can be provided for either vertical or horizontal applications.

Optional Features

Construction options using alternate materials, such as stainless steel, Monel, or other types can be provided to meet special application requirements.

Mounting brackets and other special supports to provide ease of installation.

Outlet heads and nozzles can be provided for in-line applications.

Restrictive diffusers built to ASME Section VIII Division 1, designed, to maintain back pressure or control blowdown time.

Elbows, tailpipes and weather hoods are available.

Special paints

Side inlets available.

A Complete SolutionUniversal AET’s extensive in-houseengineering, manufacturing, and testingfacilities ensure an optimized process,mechanical and acoustic solution for anyapplication.

The concentric annular ring design (left) and the wrapped Acousti-Tube vent silencer design (right) offer a choice of silencer profile and configuration to meet site-specific requirements.

Annular Ring Acousti-Tube™

High-EfficiencyAcoustic Pack

Designed forOptimum SpaceConsiderations

All-Welded SteelOuter Shell

Pack Retention with Pre-Compression

Lower ChamberInsulation

(Except HV5 and HV10)

Inlet Diffuser,Depending on

Application

Easy To Specify and OrderVent and blowdown silencers are rarely a simple catalog selection. For each application, detailed specifications and system description are required for B&W Universal to provide a custom solution.

By providing either a valve manufacturer's specification sheet, or a vent silencer application sheet, our experienced sales and application engineering staff can provide a silencer that will be best suited to meet your application requirements.

A Complete SolutionB&W Universal's extensive in-house engineering, testing and manufacturing facilities with optimized processes will provide both mechanical and acoustic solutions for any application.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

veBl

ower

Sile

ncer

s

4.2

Vent

Sile

ncer

s4

21

35

67

8

Orde

ring

Info

rmat

ion Application

MethodologyVent Silencers

The B&W Universal HV Series of vent and blowdown silencers come with an outlet diffuser or orifice plate that is a critical element to the acoustic and mechanical performance. Both the inlet nozzle and the diffuser/orifice are designed and constructed to withstand thermal and impact stresses produced in high pressure, high temperature, continuous or intermittent blowdown service.

In vent applications, critical flow will occur for most gases at valve upstream pressures greater than twice the outlet pressure. Vent and blowdown noise levels increase with increased pressure drop and are also affected by valve aerodynamic recovery characteristics. Large valve, low pressure vents will produce relatively broadband frequency noise, while high pressure vents with smaller valves will produce high frequency noise.

Subsonic (or non-critical flow) low pressure vent and blowdown applications may not require an inlet diffuser. Contact B&W Universal for silencer recommendations when a combination of both low pressure drop and acoustic requirements must be met.

The HV Series is offered in six standard acoustical ratings, ranging from 15 to 70 dB. The HV05 is offered for applications where only minimum noise reduction is required. The HV30 is offered for applications where maximum silencing is required. Acoustic ratings are offered in sizes that cover a wide range of gas flows.

HV20 and HV30 acoustic ratings are offered for standard pipe diameters from 2” up to 112”. All other acoustic ratings are offered for standard pipe diameters of 12” to 112”.

Application AnalysisThe following application data is used for vent silencer selection.

Type of gas:Molecular weight or specific gravity of the gasRation of specific heatsFlow rate (lb/hr, ACFM or SCFM)Pressure and temperature upstream of valve and silencerMaximum allowable pressure drop (psi) for valve and silencerManufacturer's name, valve type and size (if available)Un-silenced noise from valve during operating conditions (if available)Silenced noise level (at distance from source)Silencer inlet size and pressure rating Inlet orientation (end inlet, or side inlet)Piping arrangement (include schematic if available)Other required options

Note:Form 88-0063 is available to record this and other information. Using this information, B&W Universal will prepare a computer analysis and a comprehensive technical proposal along with a price quotation. Silencer selection is based upon optimization of flow velocity, required acoustical performance, and pressure drop.

HV05

Series

HV10HV15HV20HV25HV30

Industrial

Classification

CommercialSuburbanResidential

HospitalCritical

15–20

AverageDynamic

Insertion Loss(dBA)

20–3030–4040–5050–6060–70

Silencer Ratings1 by Grade Classification

B&W Universal is skilled in the application of process engineering principles that are needed to meet your application requirements. A key element of a successful vent application is establishing pressure drop in the piping, valve and vent silencer. Valve performance and life can be extended by appropriate distribution of pressure drop in the complete system. In many cases it is possible to reduce the pressure drop across the valve body to less than critical. This can potentially result in reduced valve actuator open/close force requirements. As a result, reduced valve wear caused by cavitation damage and reduced through-valve body noise are added benefits.

B&W Universal can verify the valve flow and pressure drop characteristics from any valve manufacturer's data sheet. B&W Universal offers a complete application engineering solution, including determination of blowdown time, bottled volume calculations, and complete valve, pipe treatment, and vent discharge acoustic performance predictions.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

veBl

ower

Sile

ncer

s4.3

Vent

Sile

ncer

s4

21

35

67

84.3

Orde

ring

Info

rmat

ion

Application NotesPipe size immediately downstream from a valve affects the noise spectrum octave band distribution. B&W Universal has developed proprietary methods to predict octave band distribution and accurately select the appropriate balance of reactive and absorptive elements in our vent silencer designs.

Annular vent silencers are assembled with structural members that accommodate thermal expansion in high temperature applications. The acoustic packing consists of long fiber mineral wool that is protected by fiberglass cloth and a perforated metal sheet. The sound-absorbent packing is filled under pressure, using compression rings to minimize voids and settling.

The HV Series of vent silencers are designed so the inlet flange and diffuser are matched to the discharge rating of the valve. Often, B&W Universal can create a more cost-effective valve and piping system by using a restrictive diffuser or an orifice plate to stage the system pressure drop. Vent silencers with restrictive diffusers are designed with pressure ratings that match the PSV inlet pressure rating. It is important to ensure that the control valve will not malfunction from the rated back pressure of the restrictive diffuser. Please review the valve manufacturers' data sheet.

Customers are encouraged to contact the Compressed Gas Association (CGA) for additional standards relating to preparation and cleaning for applications in pure oxygen service.

Construction FeaturesB&W Universal vent silencers are heavy duty units. The inlet nozzle and diffusers are constructed of steel and fully welded. The diffuser provides controlled pressure expansion to atmosphere and uniform flow distribution through the acoustic section of the silencer.

The lined vent silencer inlet plenum (expansion chamber) is designed with a double shell separated by a layer of acoustic insulation and sound deadening material. The inner shell is solid to prevent shell-radiated noise and the potential of migration of the acoustic packing. The transmission loss across the plenum and bottom head is comparable to the silencer attenuation.

ProductDescriptionVent Silencers

ww

w.b

abco

ck.c

om/u

nive

rsal

Date:Project Name: Customer Contact: Contact Info:

Quote #:BDM:

ApplicationNoise source: Type of process:

Attached Valve Data SheetType of Gas: Pressure upstream of valve:

Molecular Weight: Temperature upstream of valve:Ratio of Specific Heats: Maximum flowrate:

Continuous Pressurized volume of piping:Intermittent Maximum allowable blowdown time:Occasional Final upstream pressure:

SPL PWL 31.5 63 125 250 500 1000 2000 4000 8000dB(A) dB(L)

If SPL, indicate distance and angle:

Inlet nozzle orientation: End in (axial) Side inInlet nozzle diameter: Flanged, pressure class:

Male NPT Beveled weld endSilencer orientation: Vertical Horizontal

Max allowable diameter: Max allowable length:Outlet orientation: Vertical, unless otherwise specified:Silencer supports: Shell lugs Legs

Skirt & base ring Horizontal saddlesNozzle Other:

Materials, shell: Carbon steel, unless otherwise specified:Materials, internals: Carbon steel, unless otherwise specified:

Finish:

Acoustics Silenced Sound Level: dB(A) At Distance/Angle:

Pressure Drop Maximum allowable pressure drop:

Additional Commentsor

Other Requirements

Blast per SSPC SP6, inorganic zinc primer, high heat topcoat external only unless otherwise specified:

Silencer Requirements

Silencer Design/Dimensional Information (Attach drawing or sketch if available)

VENT SILENCER REQUIREMENTS

General Information

Gas Data (Attach valve spec. sheet if available)

Customer/Location:

EWR #:Engineer:

Yellow highlight denotes required fields.

Timed blowdown applications only:Type of service

Octave Band Center Frequency (Hz)Unsilenced Sound Data, if available

Performance Requirements (Complete all Applicable Sections)

Form 88‐0063_R7 27Apr2017

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

5.1

Indu

stria

l Fan

Sile

ncer

s1

23

45

67

8

5.1

GeneralInformation

Industrial Fan Silencers

Primary air fans, forced draft fans and induced draft fans generally require some form of acoustical treatment. Most applications require inlet and/or outlet silencers to meet OSHA and other noise requirements. For continuous exposure, a maximum of 90 dBA is generally specified to avoid hearing damage. When conversation near the fan is desired, levels of 80 dBA and less are often needed.

B&W Universal designs and manufactures a complete line of silencers for application on all fan types. Computer enhanced technology developed for fan, turbine, and other air moving equipment enables B&W Universal to offer a cost-effective solution for every fan silencing application.

Each of the four designss in this section has unique advantages over the others, depending upon the application, pressure drop and space utilization. This catalog covers standard models and sizes and provides basic information to evaluate the merits of the individual designs for your application. Special configurations, materials, higher temperatures, and sizes are available upon request.

AFS Series Absorptive/Reactive SilencerThe AFS series fan silencer combines a reactive and absorptive chamber design that both reflects acoustic energy and dissipates it with absorptive pack material. Constructed from plate and sheet steel in an all-welded, straight-through flow path design, the AFS series is suitable for most applications on the inlet and discharge of centrifugal or axial blowers, especially when low pressure drop is required. The standard AFS silencer is suitable for temperatures up to 325°F.

Acousti-VaneAbsorptive/Parallel Baffle SilencerThe Acousti-Vane silencer comes instandard cross-sections and lengths thatcover a wide range of applications andprovide economical solutions to a broadrange of noise conditions. Standard unitscan be adapted for use in non-standard orapplication-specific configurations.

The Acousti-Vane is available in threestandard models:

LPThe low-pressure drop Acousti-Vane haslower pressure drop than the other twomodels and is the most economical of thethree. The LP is the silencer of choice whenpressure drop is critical and a relatively smallamount of noise attentuation is needed.

MPThe moderate pressure-drop Acousti-Vaneoffers greater acoustic performance thanthe LP at a slightly higher pressure drop.The MP models meets most noiseattenuation specifications.

HPThe high-performance Acousti-Vaneprovides maximum acoustic performance ata higher pressure drop than the LP or MP.The HP models is ideal for the mostdemanding acoustical environment.

The steel frame of the Acousti-Vanesilencers has high sound transmission loss.The standard shell finish includes solvent-cleaning by SSPC-SP-1, shop coat primerinside and outside, and a blue enamelcoating outside. The paint systemwithstands internal gas and skintemperatures up to 200ºF. Optional paintsystems are available.

Acousti-TubeAbsorptive/Tubular Flow SilencerThe modular, compact, lightweight Acousti-Tube silencer knocks out high-frequencynoise while minimizing pressure drop.

The Acousti-Tube silencer is available instandard cross-sections and lengths, whichcover a wide range of product applicationsand are economical solutions to noiseproblems. The silencer’s modular designallows customization for non-standardconfigurations without any loss of acousticperformance or increased pressure loss.

Composite materials are used in theflowpath to reduce corrosion andmaintenance. The lightweight, easy-to-handle design reduces shipping cost andinstallation time. The Acousti-Tube modulesare factory-assembled in a high-transmission-loss steel frame. The framehas a standard high-performance, two coatpaint system on interior and exteriorsurfaces suitable for outdoor installations.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

5.2In

dust

rial F

anSi

lenc

ers

12

34

56

78

5.2

SizingInformationIndustrial Fan Silencers

In order to properly size a fan silencer, the flow area through it must be sufficient to accommodate the maximum flow without imposing excessive pressure drop. The following instructions enable you to select the proper silencer size and determine actual pressure drop. These instructions assume flowing gas is air. For other gases, density, and other corrections, contact B&W Universal for assistance.

Data required:air flow rate (actual CFM)temperature (°F)pressure (psig)maximum pressure drop (inches of water)

QV

A required !

! "! "T " 460530

14.7P " 14.7Actual CFM ! (Standard CFM)

1 Determine the maximum velocity toachieve the required pressure drop.

V = air or gas velocity, ft/min (see Note 1)

!P = maximum pressure drop, inches of water

c = silencer pressure drop coefficient(see page 5.5)

T = air temperature, °F (see Note 2)P = operating pressure, psig

(if at atmospheric pressure, pressure ratio is unity and may be omitted from equation; if P exceeds 15 psig, contact B&W Universal for recommendations)

2 Determine flow area required.

A required = flow area required, ft2

Q = air flow rate (actual CFM)

For reference, if SCFM is given ratherthan ACFM, then convert using thefollowing equation.

3 From Table 1 or the tables on page 5.5select a size with a flow area equal toor greater than that calculated in step 2.

4 Determine the actual gas velocity infeet per minute.

A = flow area of size of silencer chosen, ft2

5 Determine actual pressure drop ininches of water.

QA

V actual !

0.0870.1360.1960.3490.5500.7901.0701.4001.8002.2002.6003.1003.7004.3004.9005.6006.3007.1007.9008.7009.600

10.60011.50012.60015.90019.600

4568

10121416182022242628303234363840424446485460

Flow Area(ft2)

Diameter(in)

Conversion—Pipe Diameterfrom Flow Area1

Notes1 Since self noise and aerodynamic noise

generation increase with velocity,absorptive silencers are usually sized for4,000–8,000 ft/min. In no case shouldthe velocity exceed 15,000 ft/min,regardless of pressure drop allowed.

2 Typical attenuation curves indicate thecharacteristics of the silencer series andare neither a minimum nor a guaranteefor an individual silencer. Individualsilencer performance can be affected bysound source characteristics includingpure tones, flow velocity, adjacent piping,and temperature.

2

V ! 4005#$$$$$$$! "! "! "14.7P " 14.7

!Pc

T " 460530

! "! "! "530T " 460

P " 14.714.7

V actual4005

!P actual ! c

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

5.3

Indu

stria

l Fan

Sile

ncer

s1

23

45

67

8

5.35.3AF

S Se

ries

5.3

AFS SeriesCombination Type Silencer

Featuresstraight-through flow pathcombination reactive and absorptivedesign for best mid-frequency attenuationlow-pressure droppressure drop coefficient, c = 0.6 for pipesizes < 24" and c = 1.0 for 24" and larger124/150# ANSI drilled plate flangesall-welded mild steel construction primer-coated exterior

Common Applicationscentrifugal blowers inlet and dischargeaxial blowers inlet and discharge industrial fans inlet and dischargecentrifugal compressors inlet small reciprocating compressors

6" pipe size12" pipe size24" pipe size

NoteAFS series standard paint and acousticalpacking are suitable for 325°F.

40

50

63 125 250 500 1K 2K 4K 8K

10

0

20

30


Attenuation, dB


Model

AFS-4AFS- 5AFS-6AFS-8AFS-10AFS-12AFS-14AFS-16AFS-18AFS-20AFS-22AFS-24AFS-26AFS-28AFS-30AFS-32AFS-34AFS-36AFS-42AFS-48

Part

61-104-AA61-105-AA61-106-AA61-108-AA61-110-AA61-112-AA61-114-AA61-116-AA61-118-AA61-120-AA61-122-AA61-124-AA61-126-AA61-128-AA61-130-AA61-132-AA61-134-AA61-136-AA61-142-AA61-148-AA

P

4568

10121416182022242628303234364248

D

1214162024283636424848546060666666728496

L

3440¹⁄₂

4760¹⁄₂

67¹⁄₂

74¹⁄₂

89100¹⁄₂

108124129143157168¹⁄₂

182187¹⁄₂

193207220272

N

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

66

H

2834¹⁄₂

4153¹⁄₂

60¹⁄₂

67¹⁄₂

8293¹⁄₂

101115120134148159¹⁄₂

173178¹⁄₂

184198208260

Weight

6080

135220380500980

1,1501,4001,8001,9502,4503,6704,1004,8255,1005,4006,4009,500

15,000

Combination Type Silencer

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

5.4In

dust

rial F

anSi

lenc

ers

12

34

56

78

5.4

Acousti-VaneAbsorptive Parallel Baffle TypeRectangular Silencers

The Acousti-Vane silencer is designed as astand-alone silencer or in series with USI’sAcousti-Tube silencer. The superior noiseattenuation of the Acousti-Vane, combinedwith the superior high-frequency performanceof the Acousti-Tube, provides excellent noisecontrol over a broad spectrum.

The Acousti-Vane silencer comes instandard cross-sections and lengths thatcover a wide range of applications andprovide economical solutions to a broadrange of noise conditions. Standard unitscan be adapted for use in non-standard orapplication-specific configurations.

The Acousti-Vane is available in three standard models:

LPThe low-pressure drop Acousti-Vane hasthe lowest pressure drop and is the mosteconomical of the three.

MPThe moderate-pressure drop unit offersgreater acoustic performance than the LP ata slightly higher pressure drop and meetsmost noise attenuation specifications.

HPThe high-performance Acousti-Vaneprovides the maximum acousticperformance. The HP model is ideal for themost demanding acoustical environment.

The steel frame for Acousti-Vane silencershas high sound transmission loss. The paintsystem withstands internal gastemperatures and skin temperatures up to200°F. Optional paint systems are available.

How Do I Choose?Three parameters are needed to select thecorrect silencer: (1) required acousticinsertion loss, (2) allowable pressure loss,and (3) the flow in actual cubic feet perminute (ACFM) of your equipment.

Follow these steps to find the silencer thatis most appropriate for your application.

1 Determine the required dynamicinsertion loss by octave band for yourequipment and select the minimumsilencer length that gives the requiredloss for each model.

2 Determine the allowable pressure dropand flow in ACFM for your application.To find the pressure drop for gastemperatures other than 60°F, multiplythe selected value by [520/(actual gastemperature °F " 460)].

3 Choose the Acousti-Vane model foryour application. From the three graphson page 5.5, choose the one that has theallowable pressure drop on the Y-axis.Read straight across until the line meetsthe pressure drop curve. Thecorresponding X-axis value is themaximum face velocity that will maintainthe pressure drop requirement.

4 Divide the ACFM by the required facevelocity to find the minimum silencercross-section that would give therequired pressure drop.

Face velocity is defined as the flow ratein ACFM divided by the silencer facearea in square feet (W # H).

5 Select the silencer from the tables onpage 5.5. Replace L in the part number with the length of silencer you found in step 2. Specify whether the silencer is an LP, MP, or HP model. The pressure drop will be equal to or slightly below the allowable pressure drop you selected. For special applications that require minimum pressure drop and demanding acoustic specifications, contact B&W Universal.

Example Case: Acousti-Vane Selection for a Gas Turbine Inlet1 The insertion loss needed to

attenuate noise is determined to be4, 7, 12, 20, 20, 18, 18, 14, 11 inthe octave band center frequencies31.5 Hz–8 kHz.

2 Tables 1–3 on page 5.5 show thata 12-ft LP, 9-ft MP or a 5-ft HPwould satisfy the requirements.

3 For this application, the allowablepressure drop is 0.25 inches ofwater. Which eliminates the HPmodel (see graph to the right ofthe table). For purposes ofexample, the flow in ACFM isassumed to be 30,000.

4 The graphs on page 5.5 show thatthe maximum face velocity toachieve 0.25 inches of water is2,000 ft/min for the 12-ft LP and1,500 ft/min for the 9-ft MP.

5 Divide the flow in ACFM by therequired face velocity for eachsilencer:

LP ! 30,000/2,000 ! 15 ft2

MP ! 30,000/1,500 ! 20 ft2

6 In Table 4 on page 5.5, find thesilencer size that is equal to orgreater than 15 ft2 for the LP modeland 20 ft2 for the MP. In thisexample, the 4 # 4 LP (at16 ft2 face velocity) and 4 # 6 MP(at 24 ft2)meet your specifications,so you choose between:

AV $ 4 # 4 $ 12 $ LP

or

AV $ 4 # 6 $ 9 $ MPAcousti-Vane dimensions. The silencercomes in standard cross-sectionaldimensions and standard flange patterns.Flange patterns also can be designed tomatch your specifications. Silencers maybe applied at temperatures that rangebetween $20°F and 200°F. For standardflange patterns, silencer weights, and otherdetails, request Technical Bulletin 94-1327.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

5.5

Indu

stria

l Fan

Sile

ncer

s1

23

45

67

8

5.5

0.10

0.12

0.14

0.16

0.18

1K 1.1K 1.2K 1.3K 1.4K 1.6K1.5K 1.7K 1.8K 1.9K 2K

0.04

0.02

0.06

0.08

Face Velocity, ft/minPressure Drop, inches of H

2 O

12 ft. Acousti-Vane 9 ft. Acousti-Vane 6 ft. Acousti-Vane 3 ft. Acousti-Vane

0.40

0.50

0.60

0.70

0.80

1K 1.1K 1.2K 1.3K 1.4K 1.6K1.5K 1.7K 1.8K 1.9K 2K

0.10

0.00

0.20

0.30

Face Velocity, ft/min

Pressure Drop, inches of H2 O

3456789

101112

1122233344

2344556677

4567889

101112

59

1013151618202224

79

1113151821242628

58

1012121416202020

3479

111315181818

245679

11141414

1224579

111111

Octave Bands (Hz)SilencerLength (ft) 31.5 63 125 250 500 1K 2K

LP (low pressure drop) Models

4K 8K

1

3456789

101112

3333445566

4455667788

7899

101012141515

10121518202224252628

12162025272930323436

13162022242729323232

11131518212426282828

9111213141516181818

57899

1012141414


MP (moderate pressure drop) Models

4K 8K

2

3456789

101112

3344555667

5678899

101011

9101214151617191920

13162123252729313335

15182226303336394245

16202327313641464748

16202427313336394245

12141619212427303030

7101214161820222324


HP (high performance) Models

4K 8K

3

2.00

2.50

3.00

3.50

4.00

1K 1.1K 1.2K 1.3K 1.4K 1.6K1.5K 1.7K 1.8K 1.9K 2K

0.50

0.00

1.00

1.50



Notes: Dynamic insertion loss in dB for face velocities <1500 ft/min, and pressure drop for gas temperatures of 60 ˚F. To find the pressure drop for gas temperatures other than 60˚F, multiply the selected value by [520/(actual gas temperature ˚F + 460)]. Contact B&W Universal for more information about face velocities >2000 ft/min.

4 Acousti-Vane Part Numbers and Face Areas

AV-2 #2-L-mAV-2 #3-L-mAV-2 #4-L-mAV-3 #4-L-mAV-4 #4-L-mAV-4 #6-L-mAV-5 #6-L-mAV-6 #6-L-mAV-6 #8-L-mAV-7.5#7.5-L-mAV-8 #8-L-m

Part Number (AV-H # W-model)

468

1216243036485664

Face Area (ft2)

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

5.6In

dust

rial F

anSi

lenc

ers

12

34

56

78

5.6

2.002.252.50

1K 1.1K 1.2K 1.3K 1.4K 1.5K 1.6K 1.7K 1.8K 1.9K 2K

0.500.25

0.75

0.00

1.001.251.501.75



5 ft. Acousti-Tube4 ft. Acousti-Tube3 ft. Acousti-Tube2 ft. Acousti-Tube

Acousti-Tube dimensions.The Acousti-Tube silencer comes in standardcross-sectional dimensions and standardflange patterns. Flange patterns also can bedesigned to match your specifications.

2345

0011

2234

5678

79

1113

13172023

26324042

40505560

39485356

32374143


Dynamic Insertion Loss in dB for Face Velocities <1500 ft/min

4K 8K

1

Figure 1Pressure Drop versus Silencer FaceVelocity. To find the pressure drop for gastemperatures other than 60°F, multiply theselected value by 520/(actual gastemperature °F " 460).

Acousti-TubeAbsorptive Tubular Flow TypeRectangular Silencers

The Acousti-Tube silencer comes instandard cross-sections and lengths, whichcover a wide range of applications and areeconomical solutions to industrial fan noiseproblems. The silencer’s modular designenables customization for non-standard configurations without any loss of acousticperformance or increased pressure loss.

Composite materials are used in the flowpathto reduce corrosion and maintenance.

The modular, compact, lightweight Acousti-Tube silencer knocks out high-frequencynoise while minimizing pressure drop.

How Do I Choose?As with the Acousti-Vane, three parametersare needed to select the correct Acousti-Tube silencer: (1) required acousticinsertion loss, (2) allowable pressure loss,and (3) the flow in actual cubic feet perminute (ACFM) for your equipment.

Follow these steps to choose theappropriate silencer:

1 Determine the required dynamicinsertion loss by octave band for yourequipment. Use Table 1 to select theminimum silencer length that gives therequired octave band insertion loss.

2 Determine the allowable pressure dropand ACFM for your application. In Figure 1, find the Y-axis value for theallowable pressure drop. Read straightacross the graph to the pressure dropcurve. The corresponding X-axis value isthe maximum face velocity that willmaintain the pressure drop requirement.

3 Divide the ACFM by the required facevelocity to find the minimum cross-section that gives the required pressuredrop. Face velocity is defined as the flowrate in ACFM divided by the silencer facearea in square feet (W # H).

4 Select the silencer model from Table 2.Replace L in the model number with the length of silencer you found in step 2. The part number for ordering will be the prefix 07-, the dimensions of the silencer, and the suffix -AA. So a 2 # 2 # 4 silencer would have a part number of 07-224-AA. For special applications that require minimum pressure drop and demanding acoustic specifications, contact B&W Universal.

Acousti-Tube Part Numbersand Face Areas2

AT-2 #2-LAT-2 #3-LAT-2 #4-LAT-3 #4-LAT-4#4-LAT-4 #6-LAT-5 # 6-LAT-6 #6-LAT-6 #8-LAT-7.5 #7.5-LAT-8 #8-L

468

1216243036485664

Part Number (AV-H # W-L) Face Area (ft2)

The lightweight, easy-to-handle designreduces shipping cost and installation time.The Acousti-Tube modules are factory-assembled in a high-transmission-loss steelframe. The frame has a standard high-performance, two-coat paint system oninterior and exterior surfaces suitable foroutdoor installations.

Acousti-Tube silencers operate optimally attemperatures between –20°F and 200°F.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

6.1

Vacu

um P

ump

Liqu

idSe

para

tor-S

ilenc

ers

12

34

56

78

6.1

GeneralInformation

Vacuum Pump LiquidSeparator-Silencers

Operation and CapacityWhen a vacuum pump starts operating atnormal atmospheric pressure, systempressure drop and power requirements are attheir maximum. As the vacuum pumpcontinues to evacuate the system, the inletpressure decreases so the system pressurelosses and power requirements decrease.The inlet volume flow in actual cubic feet perminute (ACFM) stays essentially constantthroughout system operation, but because ofdecreasing inlet pressure, the dischargevolume decreases until normal operatingconditions are reached.

Vacuum pump capacities at operatingconditions are expressed by the inletvolume flow of air and the amount that theinlet pressure has been reduced belowatmospheric pressure. Thus, vacuum pumpcapacities are stated in inlet ACFM at arelative vacuum, usually measured in inchesof mercury (Hg).

Liquid Separation PerformanceSeparator-silencers meet their rated liquidseparation efficiency at a nozzle velocity of5,500 ft/min. At lower velocities theirperformance improves. At higher velocitiestheir efficiency decreases. The nozzlevelocity is the air velocity in the inlet ordischarge nozzle and is equal to the actualvolume flow rate (ACFM) divided by thenozzle area.

Since the inlet volume flow rate is nearlyconstant during normal vacuum pumpoperation, the inlet separator-silencershould be sized so the velocity does notexceed 5,500 ft/min during all phases ofoperation (Table 1, page 6.2).

The discharge flow rate decreases fromstartup to normal operation, and in someapplications it may be acceptable to exceeda velocity of 5,500 ft/min during startup. If it is not acceptable to discharge liquidduring startup, the velocity must be reduced.

Vacuum Pump SystemsSeparator-silencers are used to removeliquid from gas flow vacuum systems usingeither liquid-sealed rotary positive blowersor liquid ring vacuum pumps (Fig. 1).

Separator-silencers may be required forboth the inlet (vacuum) and the discharge(atmospheric) of a vacuum system. Only themost stringent acoustical environments

require significant inlet silencing. An inletseparator provides corrosion protection forthe vacuum pump by removing most, if notall, of the process liquid before it enters thevacuum pump.

The vacuum pump or blower discharge isnormally extremely noisy and requires ahigh-performance separator-silencer.

liquidair

dischargeseparator-silencer

inletseparator-silencer

vacuumpump

1

2

3

4

5

6

7

Figure 1This is an example of a vacuum pumpand liquid removal system. Air and liquidenter the inlet separator-silencer duringprocessing (1). Process liquid isremoved (2), and air enters the vacuumpump (3). The pump takes in seal liquid(4). Air and seal liquid are pumped intothe discharge separator-silencer (5),which removes the liquid (6) and sendsthe air into the atmosphere (7).

If some liquid bypass is allowed duringstartup, the selection of the dischargeseparator-silencer should be based onpressure drop.

Inlet and discharge separator-silencersrequire drain systems to remove the liquid.These systems (both inlet and discharge)must provide an adequate drain sealingsystem or liquid level to offset the vacuumon the inlet side and prevent blowout on thedischarge side. See Tables 2 and 3 on thefollowing page for liquid removal data.

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

6.2Va

cuum

Pum

p Li

quid

Sepa

rato

r-Sile

ncer

s1

23

45

67

86.2

Application GuideVacuum Pump LiquidSeparator-Silencers

Technical DetailsSeparator-silencer pressure drop depends onvelocity and pressure. In a vacuum system,pressure drop is at a maximum duringstartup. Under normal atmosphericconditions, the pressure drop at startup, foreither an inlet or discharge separator-silencer,is calculated from the following equation:

ACFM = inlet volume flow ratec = separator-silencer DP coefficient

(see Table 3)!P = pressure drop in inches of water

p = separator-silencer size(nozzle diameter) in inches

V = velocity in ft/min

If the startup pressure drop is too great, usethe flow given for a lower relative vacuum,or calculate a separator-silencer size fromthis equation:

c = separator-silencer DP coefficient!P = desired pressure drop in inches

of waterp = separator-silencer size

(nozzle diameter) in inches

ACFMp2

c477

2!P ! ! "

p ! 0.214 ACFM

V4005

2

! c ! "

#$$$$#$$

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

1012141618202224262830

3070

120190270370480750

1,0801,9203,0004,3005,9007,7009,700

12,00014,50017,30020,30023,50027,000

3681

144225324441576900

1,3002,3103,6005,1907,0609,220

11,67014,41017,43020,75024,35028,24032,420

45101180282406552721

1,1301,6202,8804,5106,4908,830

11,50014,60018,00021,80026,00030,50035,30040,600

60135241376541737963

1,5002,1703,8506,0208,660

11,80015,40019,50024,10029,10034,70040,70047,20054,100

75169301471678922

1,2001,8802,7104,8207,53010,80014,80019,30024,40030,10036,40043,40050,90059,00067,800

90204362565814

1,1101,4502,2603,2605,7909,050

13,00017,70023,20029,30036,20043,80052,10061,20070,90081,400

98221393614884

1,2001,5702,4503,5306,2809,800

14,10019,20025,10031,80039,30047,50056,50066,40077,00088,400

Operating Vacuum, Inches of HgNominalSize 0* 5 10 15 18 20 25**

Maximum Capacity (Inlet ACFM) for Full Liquid Separation Efficiency at Operating Vacuum

* This column is used for inlet separator-silencers and discharge separator-silencers with no liquid bypass during startup.** Capacity at operating vacuum greater than 20" Hg is limited by startup conditions.

Drain Size (O)

Models UWVS, UWSI,RWVS, RWSI

ModelsUVCS, UVRSRVCS, RVRS RWVS/UWVS 4.0 99%

RWSI/UWSI 3.0 90%RVCS/UVCS 4.0 99%RVRS/UVRS 4.5 >99%

Model Pressure DropCoefficient (C)

SeparationEfficiency

1

Maximum Liquid Flow in GPMfor Various Drain Sizes*2

Pressure Drop Coefficientsand Separation Efficiency3

* Values are based on gravity drain and may be larger witha positive drainage system.

c!P

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10

15305075

120150200300450800

1,200

10203560

100125160260400650

1,000

ww

w.b

abco

ck.c

om/u

nive

rsal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

6.3

Vacu

um P

ump

Liqu

idSe

para

tor-S

ilenc

ers

12

34

56

78

6.3Ro

tary

Pos

itive

Bl

ower

Sile

ncer

s6.36.3

Vacu

um P

ump

Liqu

idSe

para

tor-S

ilenc

ers

RWVS/UWVSSeries

Inlet Liquid Separator-Silencers

P

N

L

Z

P

O

inletflow

K

D

J

P

N

LP

O

inletflow

Z

UWVSPart

Number6U-#-AA P (nom.) O (nom.) N L K

KUWVS

Z J D Weight

The RWVS and low profile UWVS inletliquid separator-silencers provide corrosionprotection for vacuum pumps by removingmost of the process liquid before it entersthe vacuum pump. These separators arebest suited for full vacuum conditions undercritical applications which require inletsilencing. Exterior surfaces receive a shopcoat of rust inhibitive primer.

Max.ACFM

at Vacuum(Blower Inlet)

LiquidGPM**

Rated Capacity*

* Capacities for larger sizes available on request.** If maximum gas flow is not exceeded for a given separator size, liquid GPM may exceed nominal capacity shown, up to the capacity of the next larger separator.

Side View

Top View

104105106108110112114116118120122124

ModelUWVS-

4568

1012141618202224

RWVSPart

Number6R-#-AA

104105106108110112114116118120122124

ModelRWVS-

45681012141618202224

4568

1012141618202224

22¹⁄₂

33¹⁄₂

456688

1010

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

525866788597

105114135138149158

13¹⁄₂

14¹⁄₂

1821¹⁄₂

2631¹⁄₂

36¹⁄₂

41¹⁄₂

47525762

91112141518212424273033

19¹⁄₂

23¹⁄₂

30363745475068667074

5⁵⁄₈

7¹⁄₈

89³⁄₄

10¹⁄₂

13¹⁄₄

1618⁹⁄₁₆

18⁷⁄₁₆

21¹⁄₈

23⁷⁄₈

26⁵⁄₈

12³⁄₄

1618222430364242485460

76144189355442630

1,0291,4011,6452,9252,3843,502

530830

1,2002,1003,3004,7006,0007,800

10,00012,00015,00018,000

355580

150200300400500600800

1,0001,200

UWVS SeriesRWVS Series

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB

Typical Insertion Loss

1K 2K 4K 8K

K

D

J

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

6.4Va

cuum

Pum

p Li

quid

Sepa

rato

r-Sile

ncer

s1

23

45

67

86.4 6.4

RWSI/UWSI SeriesInlet Liquid Separator-Silencers

The RWSI and low profile UWSI inlet liquidseparator-silencers provide corrosion protectionfor vacuum pumps by removing most of theprocess liquid before it enters the vacuumpump. These separators are best suited for fullvacuum conditions under critical applications,which require inlet silencing. The RWSI modelshave a unique profile and larger pipe sizes thanthe RWVS series. Exterior surfaces receive ashop coat of rust inhibitive primer.

* Capacities for larger sizes available on request.** If maximum gas flow is not exceeded for a given separator size, liquid GPM may exceed nominal capacity shown, up to the capacity of the next larger separator.

204205206208210212214216218220222224226228230

4568

1012141618202224262830

121618222430364242485460667278

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

263136465868788898

108120130140150160

1114¹⁄₄

15¹⁄₂

182325¹⁄₂

282830¹⁄₂

33353840¹⁄₂

4345¹⁄₂

91112141518212424273033363942

151821273440465258647177838995

3³⁄₄

5³⁄₁₆

5¹¹⁄₁₆

6¹¹⁄₁₆

6⁵⁄₈

8⁵⁄₈

111312141618202224

22¹⁄₂

33¹⁄₂

4566888

10101010

4082

108202276403708950

1,0501,3081,6192,4812,9863,5544,959

530830

1,2002,1003,3004,7006,0007,800

10,00012,00015,00018,00021,00024,00028,000

355580

150200300400500600800

1,0001,2001,4001,6001,800

UWSIPart

Number6U-#-AA P (nom.) D N L K

KUWSI

Z J O (nom.) Weight

4568

1012141618202224262830

ModelUWSI-

204205206208210212214216218220222224226228230

RWSIPart

Number6R-#-AA

4568

1012141618202224262830

ModelRWSI-

Max.ACFM

at Vacuum(Blower Inlet)

LiquidGPM**

Rated Capacity*

P

inletflow

NP

O

Z

L

K

J

D

P

inletflow

N

P

O

Z

L

K

J

D

Side View

Top View

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB


1K 2K 4K 8K

UWSI SeriesRWSI Series

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

6.5

Vacu

um P

ump

Liqu

idSe

para

tor-S

ilenc

ers

12

34

56

78

6.5Ro

tary

Pos

itive

Bl

ower

Sile

ncer

s6.5

RVCS/UVCSSeries

Discharge Liquid Separator-Silencers

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB


1K 2K 4K 8K

The RVCS and low profile UVCS modelsprovide high performance liquid separationand noise attenuation. When an inletseparator is not installed, the dischargeseparator may need to be oversized.Exterior surfaces receive a shop coat ofrust inhibitive primer.

All models use a pipe thread connection (MNPT) for the liquid outlet (O).Sizes 1"–3¹⁄₂" are standard with male pipe thread connection (MNPT).Sizes 4"–16" are standard with 150# ANSI drilled plate flanges.

4¹⁄₂

4¹⁄₂

68

1010121216182224303642

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416

301317315302325303335304305306308310312314316

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416

22233333333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

141417222427302935425256697588

6679

10111213¹⁄₂

14¹⁄₂

1821¹⁄₂

2631¹⁄₂

36¹⁄₂

41¹⁄₂

5¹⁄₄

5¹⁄₄

678899

11121415182124

———————89

101214161619

———————33¹⁄₂

3¹⁄₂

44¹⁄₂

556¹⁄₂

8³⁄₄

8101314161818¹⁄₂

21¹⁄₂

27323240¹⁄₂

4352

———————4¹⁄₄

6¹⁄₄

7¹⁄₄

9¹⁄₄

10¹⁄₄

12³⁄₄

15³⁄₄

18³⁄₄

2³⁄₃₂

2¹⁄₁₆

2³⁄₄

3¹¹⁄₁₆

4⁵⁄₈

4⁹⁄₁₆

5¹⁄₂

5⁷⁄₁₆

7⁵⁄₁₆

8³⁄₁₆

9¹⁵⁄₁₆

10¹¹⁄₁₆

13⁷⁄₁₆

16¹⁄₄

18⁷⁄₈

111¹⁄₂

222¹⁄₂

2¹⁄₂

33333444

45

10152025355095

130240300445620

1,035

P (nom.)

PartNumber6U-#-AA

ModelUVCS-

D N L K E

Low Profile

K F Z R J O (nom.) Weight

301317315302325303335304305306308310312314316

PartNumber6R-#-AA

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416

ModelRVCS-

K

J

D

Pipe sizes 1"–3¹⁄₂"

P

inletflow

P

Z

N

L

FE

P

inletflow

P

O

N

Z

L

P

inletflow

P

Z

N

L

FE

K

J

R

DO

K

D

K

J

R

DO

Pipe sizes 4"–16" Pipe sizes 1"–3¹⁄₂" Pipe sizes 4"–16"

Side

Vie

wTo

p Vi

ew

RVCS Series UVCS Series

P

inletflow

P

O

N

Z

L

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

6.6Va

cuum

Pum

p Li

quid

Sepa

rato

r-Sile

ncer

s1

23

45

67

86.6

RVRS/UVRSSeriesDischarge Liquid Separator-Silencers

The RVRS and low profile UVRS modelsoffer better attenuation than the RVCS andUVCS models. For pipe sizes 1"–3", theRVRS has a side liquid outlet, while theRVCS has a vertical liquid outlet. Exteriorsurfaces receive a shop coat of rustinhibitive primer.

P

E

F

inletflow

PN

Z

L

K

J

R

D O

Pipe sizes 1"–3"

P

FE

inletflow

P

L

Z

N

P

inletflow

E

F

PN

Z

L

P

FE

inletflow

P

L

Z

N

K

J

R

DO

K

J

D

R

K

R

D O

J

Pipe sizes 3¹⁄₂"–16" Pipe sizes 1"–3" Pipe sizes 3¹⁄₂"–16"

All models use a pipe thread connection (MNPT) for the liquid outlet (O).Sizes 1"–3¹⁄₂" are standard with male pipe thread connection (MNPT).Sizes 4"–16" are standard with 150# ANSI drilled plate flanges.

4¹⁄₂

4¹⁄₂

68

1010121216182224303642

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416

401417415402425403435404405406408410412414416

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416

22223333333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

20³⁄₄

20³⁄₄

2532⁷⁄₈

35¹⁄₂

4144³⁄₈

4759¹⁄₂

71³⁄₄

90¹⁄₄

103¹⁄₄

128¹⁄₂

141¹⁄₄

154¹⁄₄

6679

10111313¹⁄₂

14¹⁄₂

1821¹⁄₂

2631¹⁄₂

36¹⁄₂

41¹⁄₂

5¹⁄₄

5¹⁄₄

678899

11121415182124

3¹⁄₂

3¹⁄₂

4566789

101214161619

1¹⁄₄

1¹⁄₄

1³⁄₄

233333¹⁄₂

3¹⁄₂

44¹⁄₂

556¹⁄₂

15¹⁄₂

14³⁄₄

192526313336¹⁄₂

47577180

101109¹⁄₄

118¹⁄₄

1¹⁹⁄₃₂

1¹⁹⁄₃₂

2³⁄₆₄

2¹³⁄₁₆

3¹³⁄₁₆

3⁹⁄₁₆

4⁹⁄₁₆

4¹⁄₄

6¹⁄₄

7¹⁄₄

9¹⁄₄

10¹⁄₄

12³⁄₄

15³⁄₄

18³⁄₄

2¹⁄₁₆

2¹⁄₁₆

2³⁄₄

3¹¹⁄₁₆

4⁵⁄₈

4⁹⁄₁₆

5¹⁄₂

5⁷⁄₁₆

7⁵⁄₁₆

8³⁄₁₆

9¹⁵⁄₁₆

10¹¹⁄₁₆

13⁷⁄₁₆

16¹⁄₄

18⁷⁄₈

111¹⁄₂

222¹⁄₂

2¹⁄₂

33333444

1010153040455570

140244355460

1,0921,6782,212

P (nom.)

PartNumber6U-#-AA

ModelUVRS-

D N L K E

Low Profile

K F Z R J O (nom.) Weight

401417415402425403435404405406408410412414416

PartNumber6R-#-AA

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416

ModelRVRS-

40

31.5 63 125 250 500

51015

0

20253035


Insertion Loss, dB


1K 2K 4K 8K

Side

Vie

wTo

p Vi

ew

RVRS Series UVRS Series

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

7.1

Engi

ne E

xhau

stSi

lenc

ers

12

34

56

78

GeneralInformation

Specialized EngineExhaust Silencers

EN Series SilencersMulti-Chamber SilencersFor the majority of engines and operating conditions, multi-chamber type silencers provide maximum noise attenuation within acceptable back pressure limits. Most naturally aspirated and supercharged engines need this type of silencer. Many turbocharged engines are best silenced with this design also. Factors which influence the choice of silencer design are explained on the following page.

ET Series SilencersStraight-Through SilencersSome engines require very low exhaust system back pressures for maximum performance. Many turbocharged engines and some naturally aspirated engines fall into this category. For these engines, straight-through, reactive silencers are available to provide adequate silencing while imposing negligible restriction on exhaust gas flow.

ES Series SilencersSpark Arresting SilencersOperating locations exist where fire hazards and safety codes require removal of sparks from exhaust gases. B&W Universal’s spark arrestor silencers are engineered to perform the dual function of spark arrestment and silencing for all internal combustion engines.

Multi-chamber exhaust silencers for mostreciprocating engines.

Straight-through exhaust silencers for engines which demand very low back pressures.

Spark arresting exhaust silencers for engines operating in high potential fire areas.

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

7.2En

gine

Exh

aust

Sile

ncer

s1

23

45

67

87.2

SizingInformationEngine Exhaust Silencers

Choosing the correct exhaust silencer for agiven engine is an important although notdifficult task. First of all, a degree ofsilencing is chosen that will satisfy thenoise requirements unique to each engineand location. Secondly, the silencer size isselected to accommodate the specifiedvolume of exhaust flow without imposingexcessive back pressure.

Selection of Silencer Type (Grade)Each silencer group described on pages7.3–7.6 has a number of a series withdifferent noise attenuation characteristics.

The series letter designation (e.g., EN2)indicates in relative terms the degree ofnoise attenuation; the higher the number,the greater the attenuation.

2 “Industrial” or “Commercial” grade

3 “Residential” grade

4 “Critical” grade

5 “Hospital” grade

The attenuation curves next to the tables oneach page indicate the attenuation in dB byoctave bands.

These curves are based upon “typical”applications. They will not necessarily definethe precise insertion loss for any specificapplication since the insertion loss achievedmay be influenced substantially by manyfactors, including engine size, type, speed,and unsilenced noise levels and frequencydistribution.

Selection of Silencer SizeThe open flow area within the silencershould be large enough to accommodatethe maximum possible exhaust flow withoutexceeding the engine manufacturer’smaximum allowable back pressure.Improperly sized silencers may cause lossof power or damage to the engine.

Data required:engine exhaust flow (CFM)exhaust temperature (˚F)maximum back pressure (inches of water)

The following formulas enable the correctsilencer size to be quickly determined.

1 Calculate gas velocity.

V = gas velocity!P = back pressure, inches of water

c = silencer pressure drop coefficient(Table 1)

T = exhaust gas temperature, ˚F

Note: Velocity should not exceed15,000 ft/min regardless of the allowable back pressure.

2 Calculate required flow area.

3 From Table 2, select the silencer sizewhich has a flow area equal to orgreater than that calculated, the actualback pressure can be calculated asfollows:

B&W Universal’s engine exhaust silencers are high quality, fully welded, reactive silencers designed to reduce exhaust noise on all types of internal combustion engines. Each engine and each operating location requires a unique combination of silencer properties.

For this reason many different silencermodels are cataloged to cover mostsilencing problems. In cases wherestandard silencers will not meet a particularspec, these custom silencers will satisfy theapplication need.

!P

V ! 4005 c ! "530T " 460

! "!P = c Vactual4005

2

! "530T " 460

EN 2, 3, 4EN5 (1"–10")EN5 (12"")ET2ET4ES2, 3

4.24.25.30.51.04.2

Silencer Model Pressure Drop Coeff. (C)

CFMsilencer flow area

V actual !

CFMV

Flow Area Required (ft2) !


0.00550.0120.0220.0340.0490.0670.0870.1360.1960.3490.550.791.071.41.82.22.63.13.74.34.95.66.37.17.98.79.6

10.611.512.615.919.6

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416182022242628303234363840424446485460

Flow Area(ft2)

Diameter(in.)

Flow Area/Size2

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

7.3

Engi

ne E

xhau

stSi

lenc

ers

12

34

56

78

4568

1012141618202224262830

Size

19-104-AA19-105-AA19-106-AA19-108-AA19-110-AA19-112-AA19-114-AA19-116-AA19-118-AA19-120-AA19-122-AA19-124-AA19-126-AA19-128-AA19-130-AA

PartNumber

121416202428363642484854606060

D

40465961747577

113127130142156169181194

L

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

N

34405354676870

106120121133147160172185

H

9101113¹⁄₂

15¹⁄₂

17¹⁄₂

21¹⁄₂

21¹⁄₂

24¹⁄₂

28¹⁄₂

28¹⁄₂

31¹⁄₂

34¹⁄₂

34¹⁄₂

37¹⁄₂

K

66¹⁄₂

7¹⁄₂

91112¹⁄₂

14¹⁄₂

15¹⁄₂

17¹⁄₂

192022¹⁄₂

24¹⁄₂

25¹⁄₂

27

Min.

151925253030304050556070808090

Max.

Y

6070

130190280420650900

1,4001,6001,8002,5003,2003,4004,700

Weight

EN2

EN SeriesMulti-Chamber Silencers

DrainP

N

N

L H D

DrainK

Y

EN2, EN3, and EN4 Series Engine ExhaustSilencers are heavy-duty, fully welded unitsconstructed of carbon steel sheet and plate.Each silencer is equipped with flangedconnections drilled to match 125/150 lbANSI specifications. Exterior surfacesreceive a coat of heat resistant paint.

For EN5 Series, 1"–3¹⁄₂" are sizes equippedwith standard male pipe thread connections.Sizes 4" and larger have flangedconnections drilled to match 125/150 lbANSI specifications.

The addition of “Y” in the model designationindicates a side inlet. Both configurationsare fundamentally alike and performance isidentical.



EN2, EN3, EN4, EN5 Series

End-In, End-Out Design

Side-In, End-Out Design

EN2Y, EN3Y, EN4Y, EN5Y Series



40

50

63 125 250 500 1K 2K 4K 8K

30


Attenuation, dB


20

10

0

40

50

63 125 250 500 1K 2K 4K 8K

20

30


Attenuation, dB


10

0

4568

1012141618202224262830

Size


PartNumber

141618222630364248485460667272

D

4759607386

111113127129142156181195209220

L

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

N

4153546679

104106120122133147172186200211

H

10111214¹⁄₂

16¹⁄₂

18¹⁄₂

21¹⁄₂

24¹⁄₂

27¹⁄₂

28¹⁄₂

31¹⁄₂

34¹⁄₂

37¹⁄₂

40¹⁄₂

40¹⁄₂

K

6789¹⁄₂

1112¹⁄₂

14¹⁄₂

16¹⁄₂

181921¹⁄₂

23¹⁄₂

252728

Min.

20242432365252626262728292

103103

Max.

Y

70130150250390700900

1,2001,4501,6002,3003,0504,4005,0005,400

Weight

EN3 w

ww

.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

7.4En

gine

Exh

aust

Sile

ncer

s1

23

45

67

87.4

EN SeriesMulti-Chamber Silencers

22-101-AA22-115-AA22-102-AA22-125-AA22-103-AA22-135-AA22-104-AA22-105-AA22-106-AA22-108-AA22-110-AA22-112-AA22-114-AA22-116-AA22-118-AA22-120-AA22-122-AA22-124-AA22-126-AA22-128-AA22-130-AA

68

10121214161822263036364248485460667272

25¹⁄₂

2734404659717285

111136138168193213227240278292329352

3333333333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

19¹⁄₂

2128344053656679

104129131161186206218231269283320343

67899

1011121416¹⁄₂

18¹⁄₂

21¹⁄₂

21¹⁄₂

24¹⁄₂

27¹⁄₂

28¹⁄₂

31¹⁄₂

34¹⁄₂

37¹⁄₂

40¹⁄₂

40¹⁄₂

2¹⁄₂

3¹⁄₂

4¹⁄₂

555¹⁄₂

689

1011¹⁄₂

1414¹⁄₂

16¹⁄₂

181921¹⁄₂

23¹⁄₂

252728

99

131618243333405065466475858596

106115128139

102030506090

110160300480800

1,0501,2001,7502,7503,0503,5505,1006,5007,6008,300

PartNumber

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

1012141618202224262830

Size D L N H K Min.

Y

Max. Weight

EN5


PartNumber

4568

1012141618202224262830

Size

141618242836364248485460667272

D

59717293

111114125139176190192217231257280

L

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

N

53656686

104107118132169181183208222248271

H

10111215¹⁄₂

17¹⁄₂

21¹⁄₂

21¹⁄₂

24¹⁄₂

27¹⁄₂

28¹⁄₂

31¹⁄₂

34¹⁄₂

37¹⁄₂

40¹⁄₂

40¹⁄₂

K

6789¹⁄₂

11¹⁄₂

1414¹⁄₂

16¹⁄₂

181921¹⁄₂

23¹⁄₂

252728

Min.

Y

2633334252526363869696

107117128139

Max.

85120170400550950

1,1001,3502,2002,5003,0003,8005,8506,7507,500

Weight

EN4


40

50

63 125 250 500 1K 2K 4K 8K

30


Attenuation, dB


20

10

0

40

50


Attenuation, dB


30

20

10

0




ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

7.5

Engi

ne E

xhau

stSi

lenc

ers

12

34

56

78


Part Number

4568

1012141618202224262830

Size

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

N

121416202428363642484854606066

D

40465961747577

113127130142156169181194

L

34405354676870

106120121133147160172185

H

5080

150230300420650900

1,3001,5001,8502,5503,2003,4004,650

Weight

ET2


Part Number

4568

1012141618202224262830

Size

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

N

141618242836364248485460667272

D

59717293

111114125139176190192217231257280

L

53656686

104107118132169181183208222248271

H

80110160400550950

1,1001,4002,3002,5002,8004,0505,5006,5007,100

Weight

ET4

ET SeriesStraight-Through Silencers

ET2 and ET4 Series Engine ExhaustSilencers are heavy-duty, fully welded unitsconstructed of carbon steel sheet and plate.Each silencer is equipped with flangedconnections drilled to match 125/150 lbANSI specifications. Exterior surfacesreceive a coat of heat resistant paint.

Due to low back pressure requirements, noside inlet configuration is cataloged. Insome special cases side inlets may bedesigned on application.

DrainP

N

N

L H D

ET2, ET4 Series



40

50


Attenuation, dB


30

20

10

0

40

50


Attenuation, dB


30

20

10

0


Note: Dimensions and weights are nominal and may vary slightly with production models.Request certified drawings of specific models for exact dimensions. w

ww

.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

7.6En

gine

Exh

aust

Sile

ncer

s1

23

45

67

87.6

ES SeriesSpark Arrestor Silencers

ES2 and ES3 Series spark arrestingsilencers are heavy-duty, fully welded unitsconstructed of carbon steel sheet and plate.Each silencer is equipped with flangedconnections drilled to match 125/150 lbANSI specifications. Exterior surfacesreceive a coat of heat resistant paint.

Large capacity spark traps are provided oneach unit which can be easily opened forperiodic cleaning. Side inlet configurationswill be designed on application.

ES2 and ES3 Series may be mountedvertically or horizontally.


Part Number

4568

1012141618202224262830

Size

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

N

121416202428363642484854606066

D

40465961747577

113127130142156169181194

L

34405354676870

106120121133147160172185

H

5070

110170290430600850

1,3501,5501,7002,4003,0503,2004,600

Weight

ES2


Part Number

4568

1012141618202224262830

Size

3333¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

N

141618222630364248485460667272

D

4759607386

111113127129142156181195209220

L

4153546679

104106120122133147172186200211

H

70130160240350600950

1,2001,5001,6502,3503,1004,5005,1005,600

Weight

ES3

DrainP

N

N

L H D

ES2, ES3 Series



40

50


Attenuation, dB


30

20

10

0

40

50


Attenuation, dB


30

20

10

0



End-In, End-Out Design

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

7.7

Engi

ne E

xhau

stSi

lenc

ers

12

34

56

78

AccessoriesEngine Exhaust Silencers

181818181818181818 181818181818

4679

101214172436626990

110130

L(Nominal)

Flex Connectors Companion Flange Set

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

1012141618

P(Size) Weight

Flex Connectors are recommended for engineexhaust applications to compensate forthermal expansion and vibration (but notmisalignment). Flexible material is type 321stainless steel, suitable for temperatures to1200˚F. Flanges and pipe fittings are mildsteel. Sizes 1"–3¹⁄₂" are standard with maleNPT, larger sizes are equipped with flangesdrilled to 125/150 lb ANSI.

80-106180-106280-106380-106480-106580-106680-106780-106880-103480-103580-103680-103780-103880-103980-104080-104180-1042

11¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416182022

¹⁄₂

¹⁄₂

1111¹⁄₂

225¹⁄₂

811142226303436

Part Number P(Fits Pipe Size) Weight

Raincaps

Raincaps prevent rain, snow, and dust fromentering the exhaust system. Non-corrosivebushings insure positive opening. All sizes arestandard in mild steel with high temperaturepaint. Sizes 8"–22" are also available instainless steel—quoted by request andequipped with adjustable counterweights.

Each Companion Flange Set includes onemild steel welding flange drilled to match125/150 lb ANSI, one gasket and one set ofbolts and nuts. Cast iron threaded flanges andstainless steel flanges are available and will bequoted on request. Single and doublereducing flanges are also available.

45681012141618202224262830

7101316303545556590105115130150160

Pipe Size Weight

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

7.8En

gine

Exh

aust

Sile

ncer

s1

23

45

67

87.8

AccessoriesEngine Exhaust Silencers

Mounting AttachmentsMounting Attachments are welded in place on the silencer shell to facilitateinstallation. Standard and variabledimensions are available.

Inspection Openings have removable coversto provide access to silencer internals forinspection or cleaning. Usually one openingper silencer chamber is recommended.

80-101980-102080-1021

3 # 44 # 66 # 8

46

12

PartInspection

Opening Size(Oval)

Weight

Inspection Openings

Explosion Relief Covers are designed to openat 5 PSI to protect the silencer shell againstrupture in case of backfire or explosion ofresidual gases within exhaust system. Oneunit in first chamber of silencer is adequate.

80-105980-106080-1053

121620

80110140

Part P-ReliefCover Size Weight

Explosion Relief Cover

ww

w.babcock

.com

/universal

These filters and filter-silencers are availablewith a variety of filter panels, each with itsown restriction characteristics. To reflect thatfact, the total pressure drop for a specific filterapplication is the sum of two pressure dropvalues:

1 The first value is the restriction that canbe attributed to the filter housing withoutfilter panels. This value is found in thegraphs at right.

2 The second value is the restrictionthrough the filter panel media. Thesevalues are taken from the table below.

The pressure drop values for the filter panelsare listed in the table as pressure drop ininches of water gauge at various flow ratesin CFM. The housing pressure drop isshown in graphical form as a function of airflow in CFM versus pressure drop in inchesof water gauge.

To avoid confusion, pressure drop values inthe graphs include pipe entrance pressuredrops from the atmospheric end of the inletpipe. These drops are significant,contributing as much as 75% of the totalpressure drop, and should not be attributedto the filter. Adding the filter transfers thesepressure losses to the interior of the filterhousing. A pressure drop measurement atthe pressure tap on the filter outlet reflectsthe total:

Pipe entrance lossVelocity pressureHousing restriction

Application GuideFilters and Filter-Silencers

500600700800900

1,0001,2501,500

0.010.020.030.030.040.050.080.12

W-2

0.060.080.110.140.170.210.310.44

DD-2

0.090.130.160.210.250.300.440.59

P-11

0.070.100.140.170.210.260.390.56

W-2and DD-2

0.100.150.190.240.290.350.520.71

W-2and P-11

0.800.961.121.281.441.602.002.40

P-8and P-12F

0.280.350.420.490.560.640.831.04

0.290.370.450.520.600.690.911.16

W-2and P-5

0.340.430.530.630.730.851.141.48

DD-2and P-5P-5CFM

per filter

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.1

Filte

rs a

nd

Filte

r-Sile

ncer

s1

23

45

67

8.1

8

Pressure Drop Values for 20" ! 25" Panel Filters, in Water Gauge

0.1

0.2

0.5

1.0

2.03.0

5.0

10.0Pressure Drop, in Inches Water Gauge

500 1K 2K 3K 5K 10K 20K 50K 100KFlow Rate, CFM

Pressure Drop Curves for Filter HousingsFH, FSH, BFH, and FASH Series

10"8" 12" 14" 18" 20" 24" 30" 36" 42" 48"16"

6" outlet nozzle size

0.1

0.2

0.5

1.0

2.03.0

5.0

10.0Pressure Drop, in Inches Water Gauge

500 1K 2K 3K 5K 10K 20K 50K 100KFlow Rate, CFM

Pressure Drop Curves for Filter HousingsFH, FSH, BFH, and FASH Series

10"8" 12" 14" 18" 20" 24" 30" 36" 42" 48"16"

6" outlet nozzle size

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.2Fi

lters

and

Fi

lter-S

ilenc

ers

12

34

56

78.2

8

FH SeriesFilter

FSH Series Filter-Silencer

The FH and FSH Series use standard panel style filter elements (20" X 25" X 2") that are available in a variety of media types and efficiencies. The supports for the filter frames inside the housings accommodate conventional 2" deep single panel filters or two (2) filters staged in series for critical service. Typically, in dual stage systems, a high efficiency pleated cellulose filter (P-11) is used as a final filter, and a less efficient pleated felt media (DD-2), or wire mesh media (W-2) will be used as primary or pre-filter.

The FSH Series of filter silencers include an integrated internal silencing section for applications that require a degree of moderate noise reduction.

The FH Series filters and the FSH Series of filter silencers are ideal when applied to centrifugal blowers, engines, and gas turbines. For use on reciprocating compressors, please contact B&W Universal for application recommendations.

FH-6-2FH-8-2FH-10-2FH-10-4FH-12-4FH-14-4FH-14-8FH-16-8FH-18-8FH-20-8FH-20-12FH-24-12FH-24-16FH-30-16FH-30-24FH-36-24FH-42-36FH-48-48

Model

FH Filter

36-306-AAL36-308-AAL36-310-AAL36-510-AAL36-412-AAL36-314-AAL36-514-AAL36-416-AAL36-418-AAL36-320-AAL36-520-AAL36-424-AAL36-524-AAL36-330-AAL36-530-AAL36-336-AAL36-342-AAL36-348-AAL

Part Number

FSH-6-2FSH-8-2FSH-10-2FSH-10-4FSH-12-4FSH-14-4FSH-14-8FSH-16-8FSH-18-8FSH-20-8FSH-20-12FSH-24-12FSH-24-16FSH-30-16FSH-30-24FSH-36-24FSH-42-36FSH-48-48

Model

FSH Filter Silencer

37-306-AAL37-308-AAL37-310-AAL37-510-AAL37-412-AAL37-314-AAL37-514-AAL37-416-AAL37-418-AAL37-320-AAL37-520-AAL37-424-AAL37-524-AAL37-330-AAL37-530-AAL37-336-AAL37-342-AAL37-348-AAL

AAABBBCCCCDDCCDDDD

Part NumberConfig.

1,0001,7502,7502,7504,0005,4005,4007,0008,900

11,00011,00016,00016,00020,50020,50035,50048,00063,000

Cap.CFM

68

10101214141618202024243030364248

A(nom.)

25.5025.5025.5025.5025.5025.5040.7540.7540.7540.7561.0061.0050.7550.7576.0076.0076.00101.38

B

23.2523.2523.2532.0032.0032.0042.0042.0042.0042.0050.0050.0056.0056.0056.0056.0081.0081.00

C

23.2523.2523.2532.0032.0032.0042.0042.0042.0042.0050.0050.0056.0056.0056.0056.0081.0081.00

D

34.5034.5034.5038.5038.5038.5047.8847.8847.8847.8855.8855.8862.5062.5062.5062.5087.0087.00

E

5.005.005.005.005.005.005.005.005.005.005.005.005.005.005.005.006.006.00

F

115125130170175180340350350365600610695795

1,0351,0852,4502,870

Weight

FH

145150160200210220405420430440725765855960

1,3401,6702,9003,565

FSH

Number andSize of Filter

Openings

2, 20!25!42, 20!25!42, 20!25!44, 20!25!44, 20!25!44, 20!25!48, 20!25!48, 20!25!48, 20!25!48, 20!25!4

12, 20!25!412, 20!25!416, 20!25!416, 20!25!424, 20!25!424, 20!25!436, 20!25!448, 20!25!4

Noise Attenuation

Nominal capacity is based on an exit velocity of approximately 5,000 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity.4"-deep filter frames will hold single or dual elements. Weights include the weights of weather louvers only. Refer to page 8.8 for filter element details.

23458

131413

63125250500

1,0002,0004,0008,000

Attenuation, dB Octave Band CenterFrequency, Hz

All units are fabricated of steel sheet and plate that are welded throughout providing a rugged, long-lasting, trouble-free air filtering system. All models are equipped with pressure taps. Outlets are 125/150 ANSI drilled plate flanges. Interior, and exterior surfaces are primed and receive a finish coat of enamel paint. Suitable mounting legs can be fitted in the field or installed at time of manufacture at extra cost.

All housings come with low profile UV stabilized plastic weather louvers. Painted steel weather hoods are available at extra cost.

B

DE

C

AF

Removable Weather Louver

B

F

C

DE

A Removable Weather Louver

B

DE

AF

C


B

F

C

DE


A B C D

Part Numbers (Standard Units with Louvers)

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.3

Filte

rs a

nd

Filte

r-Sile

ncer

s1

23

45

67

8.3

8

FRH SeriesFilter

FCRH Series Filter-Silencer

The FRH filters and FCRH Series filter silencers are similar to the FH and FSH Series but have a 2-stage filter system as standard. The second stage consists of a grouping of 12 P-5 cartridge filters for each 20" X 25" X 2" pre-filter.

The high efficiency P-5 cartridge filters have threaded ends that screw into individual receptacles. As each P-5 filter is removed and replaced, less than 4 square inches is exposed to the flow of unfiltered air. As a result, "Hot Swap" changes is an option for these units.

Usually, a moderate efficient panel filter is used as the first stage element. The pleated polyester (DD- 2), or the wire mesh media (W-2) can be used in this manner.

The FRH Series filters and the FCRH Series of filter silencers are ideal when applied to centrifugal blowers, engines, and gas turbines. For use on reciprocating compressors, please contact B&W Universal for application recommendations.

FRH-8-2FRH-10-2FRH-10-4FRH-12-4FRH-14-4FRH-14-8FRH-16-8FRH-18-8FRH-20-8FRH-20-12FRH-24-12FRH-24-16FRH-30-16FRH-30-24FRH-36-24

Model

FRH Filter

38-308-AAL38-310-AAL38-510-AAL38-412-AAL38-314-AAL38-514-AAL38-416-AAL38-418-AAL38-320-AAL38-520-AAL38-424-AAL38-524-AAL38-330-AAL38-530-AAL38-336-AAL

Part Number

FCRH-8-2FCRH-10-2FCRH-10-4FCRH-12-4FCRH-14-4FCRH-14-8FCRH-16-8FCRH-18-8FCRH-20-8FCRH-20-12FCRH-24-12FCRH-24-16FCRH-30-16FCRH-30-24FCRH-36-24

Model

FCRH Filter Silencer

39-308-AAL39-310-AAL39-510-AAL39-412-AAL39-314-AAL39-514-AAL39-416-AAL39-418-AAL39-320-AAL39-520-AAL39-424-AAL39-524-AAL39-330-AAL39-530-AAL39-336-AAL

AABBBCCCCDDCCDD

Part NumberConfig.

1,7502,7502,7504,0005,4005,4007,0008,90011,00011,00016,00016,00020,50020,50035,500

Cap.CFM

81010121414161820202424303036

A(nom.)

25.5025.5025.5025.5025.5040.7540.7540.7540.7561.0061.0050.7550.7576.0076.00

B

22.2522.2542.0042.0042.0052.0052.0052.0052.0060.0060.0066.0066.0072.0072.00

C

40.0040.0042.0042.0042.0052.0052.0052.0052.0060.0060.0066.0066.0072.0072.00

D

46.5046.5048.5048.5048.5048.5057.8857.8857.8865.8865.8872.5072.5078.5078.50

E

3.503.503.503.503.503.504.504.504.504.504.504.504.504.504.50

F

205210375380395655665665675

1,2651,3151,4401,4902,1302,230

Weight

FRH FCRH

245255385435440735745755765

1,5151,5651,6401,6902,4802,630

2, 20!25!42, 20!25!44, 20!25!44, 20!25!44, 20!25!48, 20!25!48, 20!25!48, 20!25!48, 20!25!4

12, 20!25!412, 20!25!416, 20!25!416, 20!25!424, 20!25!424, 20!25!4


Openings

242448484896969696

144144192192288288

FinalFilters

Noise Attenuation

Nominal capacity is based on an exit velocity of approximately 5,000 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity.2"-deep filter frames will hold single or dual elements. Refer to page 8.8 for filter element details.

23458

131413

63125250500

1,0002,0004,0008,000


The FSH Series of filter silencers include an integrated internal silencing section for applications that require a degree of moderate noise reduction.

All units are fabricated of steel sheet and plate that are welded throughout providing a rugged, long-lasting, trouble-free air filtering system. All models are equipped with pressure taps. Outlets are 125/150 ANSI drilled plate flanges. Interior, and exterior surfaces are primed and receive a finish coat of enamel paint. Suitable mounting legs can be fitted in the field or installed at time of manufacture at extra cost.

All housings come with low profile UV stabilized plastic weather louvers. Painted steel weather hoods are available at extra cost.

B

DE

C

AF


B

F

C

DE


B

DE

AF

C


B

F

C

DE


A B C D


ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.4Fi

lters

and

Fi

lter-S

ilenc

ers

12

34

56

78.4

8

BFH Series Filter

BFH-4-1BFH-5-1BFH-6-1BFH-8-2BFH-10-2BFH-10-4BFH-12-4BFH-14-4

Filter

35-304-AAL35-305-AAL35-306-AAL35-308-AAL35-310-AAL35-410-AAL35-412-AAL35-314-AAL

Part Number

AAABBCCC

Config.

450700

1,0001,7502,7502,7504,0005,000

CapacityCFM

4568

10101214

A

20¹⁄₂

20¹⁄₂

20¹⁄₂

25¹⁄₂

25¹⁄₂

25¹⁄₂

25¹⁄₂

25¹⁄₂

B

26¹⁄₄

26¹⁄₄

26¹⁄₄

21¹⁄₄

21¹⁄₄

27¹⁄₄

27¹⁄₄

27¹⁄₄

C

151617202327¹⁄₄

27¹⁄₄

27¹⁄₄

D

18192026¹⁄₂

29¹⁄₂

33¹⁄₂

33¹⁄₂

33¹⁄₂

E

4550557070858585

Weight

1, 20!25!21, 20!25!21, 20!25!22, 20!25!22, 20!25!24, 20!25!24, 20!25!24, 20!25!2


Openings

The B&W Universal BFH Series air filter is a compact, inexpensive unit designed to accommodate the standard 20" X 25" X 2.0" metal sided panels, single stage only, that are available in various media types and efficiencies. If noise is a concern, the BFH filter can be used in series with a separate inlet silencer.

The B&W Universal BFH line of intake filters are designed for application to compressors, blowers, engines, and gas turbines. For reciprocating compressor applications, contact B&W Universal for recommendations.

Nominal capacity is based on an exit velocity of 5,000 ft/min. Filter element capacity may be greater, but this is unrelated to the filter housing capacity. Weights shown do not include the weight of the filter elements. 2" deep panel air filters (20" X 25" X 2") are used on the BFH Series. Pleated cellulose, pleated felted synthetic polyester, or crimped galvanized steel wire mesh are available.

B

Removable Weatherhood

C

D

A Nom.Pipe Size

E

B

C


A Nom.Pipe Size

A Nom.Pipe Size

B


DE

CE

The BFH Series units are fabricated of steel sheet and plate and are fully welded to provide a rugged long lasting, trouble-free air filtering system. The filter comes with removable low profile UV stabilized plastic weather louvers. Optional metal weather hoods are available. The filter bottom plate includes an opening and bolting pattern matching 125/150 ANSI Flange specifications. The interior and exterior surfaces of the BFH Series filters are primed and given a coat of enamel paint.

A B C


Note: Refer to the Filter Elements for Filter and Filter Silencers Section for more information.

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.5

Filte

rs a

nd

Filte

r-Sile

ncer

s1

23

45

67

8.5

8

RF Series Filter-Silencer

The B&W Universal RF Series filter-silencer is a high attenuating, reactive (chamber type) silencer of rugged construction, typically required for intermediate and large low speed reciprocating or positive displacement machinery, where broadband noise attenuation and inherent vibration-resistant structural strength is required. The RF Series filter-silencers use wire mesh panel air filters and are standard in four configurations shown below.

Noise Attenuation Part Numbers (Standard with Wire Mesh Elements)

2829292826252423

63125250500

1,0002,0004,0008,000


RF units are fabricated using steel sheet and plate and are fully welded. Filter panels are serviced through hinged access doors. Flanged connections are provided with 125/150 ANSI drilled plate flanges. Internal and external surfaces are coated with a rust inhibitive primer. Exterior surfaces can be finish coated to customer specifications either during the manufacturing process or in the field if required.

C

B

D

Filter AccessDoors

125#/150#ANSI FlangeDrilling

Drain

AE

E A

C

B

D

Filter Access Doors

125#/150# ANSI FlangeDrilling

Drain

F

E A

Y

Y

C

B

D

Filter AccessDoors


Drain

AE

C

B

Filter Access Doors

125#/150# ANSI FlangeDrilling

Drain

F

Y

Y

RF Series RFY Series RFS Series RFSY Series

RF-6RF-8RF-10RF-12RF-14RF-16

RF Series

Model

42-106-AA42-108-AA42-110-AA42-112-AA42-114-AA42-116-AA

Part Number

RFY-6RFY-8RFY-10RFY-12RFY-14RFY-16

RFY Series

Model

42-206-AA42-208-AA42-210-AA42-212-AA42-214-AA42-216-AA

Part Number

RFS-6RFS-8RFS-10RFS-12RFS-14RFS-16

RFS Series

Model

43-106-AA43-108-AA43-110-AA43-112-AA43-114-AA43-116-AA

Part Number

RF/RFY/RFS-6RF/RFY/RFS-8RF/RFY/RFS-10RF/RFY/RFS-12RF/RFY/RFS-14RF/RFY/RFS-16

Model

1,0501,8752,9504,2505,6007,500

Nom.Cap.CFM

68

10121416

A

242430363642

B

79¹⁄₄

79¹⁄₄

105125124¹⁄₄

143

C

RF

79¹⁄₂

79¹⁄₂

105¹⁄₂

125¹⁄₂

125¹⁄₂

144¹⁄₂

RFY

91³⁄₄

91³⁄₄

91¹⁄₂

137¹⁄₂

143¹⁄₂

163

RFS

1313137

2121

D

RFSY

86¹⁄₄

86¹⁄₄

112132131¹⁄₂

150

RF

8383

109129129148

RFY

95¹⁄₄

95¹⁄₄

121141147166¹⁄₂

RFS

15¹⁄₂

15¹⁄₂

18¹⁄₂

21¹⁄₂

21¹⁄₂

24¹⁄₂

F

9911131416

Y

Min. Min.

2323

34¹⁄₂

403945

1, 20!25!22, 20!25!22, 20!25!24, 20!25!24, 20!25!26, 20!25!2

Number and Size of Filter Openings

400510850

1,2201,2801,950

Weight

RF, RFY RFS

450530920

1,2601,3402,070

For intermediate and large positivedisplacement blowers, reciprocating

engines, and compressors.

Nominal capacity is based on exit velocity of approximately 5,400 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity.

Refer to page 8.8 for filter element details.

For Sizes above 16" please contact B&W Universal for pricing and availability.For RFSY Series, please contact B&W Universal for pricing and availability.

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.6Fi

lters

and

Fi

lter-S

ilenc

ers

12

34

56

78.6

8

FASH SeriesAbsolute Filter

The B&W Universal FASH Series absolute filter silencer represents the ultimate high efficiency air filtration for industrial applications. The FASH Series uses both primary pre-filter and a secondary stage final, panel filter elements, with a combined depth of 20". The combination provides exceptional efficiency on ultra-fine particulates. The combination of the primary and secondary filter elements have a large surface area for low flow resistance and high particulate retention capacity. Filtration efficiency exceeds 99.97% on particles 0.3 microns.

The FASH Series utilizes a unique fluid seal for the final (secondary) panel filter element. A channel, provided on the P-12F final filter holds a stable siliconegel providing a 100% bypass-freesystem when applied to the mostsevere of conditions.

When installed, the filters are staged, so that the less costly roughing pad, and the primary filter can be serviced more frequently than the final secondary stage filter. Under typical conditions, the pre-filter will be serviced about once a year, while the final filter may provide two or three years of service.

FASH-10-4FASH-12-4FASH-14-4FASH-14-8FASH-16-8FASH-18-8FASH-20-8FASH-20-12FASH-24-12FASH-24-16FASH-30-16FASH-30-24FASH-36-24FASH-42-36FASH-48-48

Model


Part Number

2,7504,0005,4005,4007,0008,900

11,00011,00016,00016,00020,50020,50035,50048,00063,000

Nom. Cap.CFM

101214141618202024243030364248

A

25¹⁄₂

25¹⁄₂

25¹⁄₂

40³⁄₄

40³⁄₄

40³⁄₄

40³⁄₄

616150³⁄₄

50³⁄₄

767676

101¹⁄₄

B

323232424242425050525262627278

C

323232424242425050525262627278

D

5555556161616169697575858595

101

E

3¹⁄₂

3¹⁄₂

3¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

4¹⁄₂

66

F

225240245465475485495810850850955

1,5351,8652,3203,750

Weight

224448888

121216162424

Number ofElements

Noise Attenuation

23458

131413

63125250500

1,0002,0004,0008,000


Specification details for the P-8 pre-filter and the P-12F final filter can be found on the P-8 and P-12F Specification Sheet.

The FASH Series includes an integral silencing section providing a moderate degree of noise attenuation. The FASH Series filters are constructed using heavy duty carbon steel and plate. The units are welded throughout for a rugged, long lasting, trouble-free filter system.

All FASH Series filters include weather-hoods, pressure tap, and outlet flanges with 125/150 ANSI drilled plate flanges. Interior, and exterior surfaces are primed and finish coated with enamel paint. Suitable mounting legs can be fitted in the field or provided at time of manufacture. Mounting legs will be quoted based on application preferences.

For centrifugal compressors,blowers, and gas turbines.

Nominal capacity is based on exit velocity of approximately 5,000 ft/min. Filter element capacity may be greater, but this is unrelated to unit capacity. 4" deep filter frames willhold single elements or dual elements. Weights do not include the weight of the filter elements. Weight is measured with steel weatherhoods. Louvered weatherhoods reduceweight by 7 lb per filter opening.

B

F

D C

E


A

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.7

Filte

rs a

nd

Filte

r-Sile

ncer

s1

23

45

67

8.7

8

P-8 SeriesPrefilter

P-12F SeriesFinal Filter

For New Units—MeasuringPressure DropWhen new filters or filter-silencers areinstalled, make the following two pressuredrop measurements and record the resultsfor future reference:

1 Measure the pressure drop with all filters installed.

2 Measure the pressure drop with the P-8pre-filters removed, but the P-12F finalfilters installed; this gives the pressuredrop across the final filters.

3 Subtract the second value from the first to find the pressure drop across the pre-filters.

Polyester Pad ReplacementReplace the polyester pad when visibly dirty.

Filter ReplacementAfter the units have been in service and thefilters are loaded, determine whether thefilters need to be replaced as follows:

1 Measure the pressure drop with all filtersinstalled and subtract the valuemeasured at installation, when the filterswere clean, to find the pressure dropacross both loaded filters.

2 Measure the pressure drop with the P-8pre-filters removed, but with the P-12Ffinal filters installed; subtract the valuemeasured at installation, when the finalfilters were clean; if the difference ismore than 2", replace the final filters.

3 Subtract the second value from the firstto find the pressure drop across the pre-filters. If the difference is more than 2",replace the final filters.

* The polyester pad (part number 81-0400) is a 2" thick “roughing” filter that fits on the face of the P-8 prefilter. It may be purchased separately in cartons of 12 and shouldbe replaced when it is visibly dirty. Follow the service instructions for replacement.

Seal

Filter Media

Sponge NeopreneGasket

Waterproof Glass Waterproof Glass

Separators Aluminum Aluminum

Frame 16-Gauge Galvanized Steel

16-Gauge Galvanized Steel

ConstructionPleated Media

over CorrugatedSeparators

Pleated Mediaover Corrugated

Separators

Tools Neededfor Removal

Part Number 80-0457

Removal Tool(Need 2)

Part Number 80-0457

Removal Tool(Need 2)

P-8

Silicon Fluid Seal

P-12F

P-8 Prefilter

P-12F Final Filter 81-0429

Model

81-039881-0400*

Part Number

27

47

Weight

19¹⁄₂!24¹⁄₂!8

19¹⁄₂!24¹⁄₂!11¹⁄₂

Size

Individually tested andcertified 85% efficientby N.B.S. test

Individually tested andcertified 99.97%efficient by D.O.P. testfor particle size 0.3 micron

Pressure Drop, Clean Filter

0.6" water at 1,250 CFM

0.6" water at 1,250 CFM

Pressure Drop, Clean Filter

For centrifugal compressors, blowers, engines, and gas turbines. For reciprocating compressors, contact B&W Universal for recommendations.

P-8 Prefilter P-12F Final Filter

P-8 and P-12F absolute filter elementsare not cleanable; they must be replacedwith new elements according to theseinstructions.

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.8Fi

lters

and

Fi

lter-S

ilenc

ers

12

34

56

78.8

8

Filter ElementsFilter and Filter-Silencers

B&W Universal offers a wide range of sizes and types of air filters and filter-silencers for application on air-moving equipment and internal combustion engines. This catalog covers our standard off-the shelf models. Most models are stocked for immediate shipment. Special types and configurations, as well as larger sizes that are not cataloged, are quoted upon application to meet specific requirements.

P-11DD-2W-2

P-5

Easy to specify and orderWhen you work with B&W Universal, you can simply provide the flow conditions and equipment manufacturer’s information, and we can recommend a filter or filter-silencer best suited for your application. Using your information, we can prepare a comprehensive technical proposal and price quotation.

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.9

Filte

rs a

nd

Filte

r-Sile

ncer

s1

23

45

67

8.9

8

CCS/CS SeriesFilter-Silencers

CCF/CF Series Filters

The B&W Universal Series of cartridge filters and filter silencers offer high performance filtration and silencing in a convenient economical cartridge configuration. Choose from four standard models for pipe sizes from ½" to 16" with flow capacities ranging from 15 to 7,700 CFM.

Three types of filter elements are available: pleated cellulose media, pleated felt media, or wire mesh media.

The CCF and CF series filters are high quality air filters without a silencing section. The CF Series uses a top plate to provide ease of servicing and to axially seal the filter element in place. The CCF Series uses a weather hood to protect the filter element.

The CCS and CS series filters are high quality air filters including a built-in silencing section. The CS Series uses a top plate to provide ease of servicing and to axially seal the filter element in place. The CCF Series uses a weather hood to protect the filter element.

DurabilityWeather hoods for CCF and CCS sizes 2-1/2" through 5" are rugged blue ABS composite material that is paintable. Optional painted metal weather hoods are available at extra cost. All other components are carbon steel construction with semi-gloss enamel finish.

High PerformanceUnique design options combined with the latest manufacturing techniques ensure optimum performance and long life even under the most demanding of conditions.

FunctionalChoice of filter only or filter silencer.

Easy to MaintainRemovable lightweight weather hoods (available on CCF and CCS models), or removable top plate (available on CF and CS models) for easy access and servicing of the filter element.

VersatileInterchangeable filter elements provide options for filtration performance in the same housing.

CCS Series (with weatherhood) CS Series (with top plate)

CCF Series (with weatherhood) CF Series (with top plate)

¹⁄₂

Pipe Size

³⁄₄

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

445568

10121416

34-K50-TT*34-K70-TT*34-K01-TT*34-K21-TT*34-K15-TT*34-K02-TT*34-K25-TT*34-K03-TT*34-K35-TT*34-K04-TT*34-K04-AA*34-K05-TT*34-K05-AA*34-K06-AA*34-K08-AA*34-K10-AA*34-K12-AA*34-K14-AA*34-K16-AA*

34-M50-TT*34-M70-TT*34-M01-TT*34-M21-TT*34-M15-TT*34-M02-TT*34-M25-TT*34-M03-TT*34-M35-TT*34-M04-TT*34-M04-AA*34-M05-TT*34-M05-AA*34-M06-AA*34-M08-AA*34-M10-AA*34-M12-AA*34-M14-AA*34-M16-AA*

34-L21-TT*34-L15-TT*34-L02-TT*34-L25-TT*34-L03-TT*34-L35-TT*34-L04-TT*34-L04-AA*34-L05-TT*34-L05-AA*34-L06-AA*34-L08-AA*34-L10-AA*34-L12-AA*34-L14-AA*34-L16-AA*

34-N21-TT*34-N15-TT*34-N02-TT*34-N25-TT*34-N03-TT*34-N35-TT*34-N04-TT*34-N04-AA*34-N05-TT*34-N05-AA*34-N06-AA*34-N08-AA*34-N10-AA*34-N12-AA*34-N14-AA*34-N16-AA*

CCS CS CCF CF

Part Numbers

*Specify “P” at end of part number for unit with pleated paper elements, “F” for pleated felt or “W” for wire mesh.Refer to page 8.11 for filter element details.

Sizes ¹⁄₂"–1" Use CCS or CS Series

Performance Benefits

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.10Fi

lters

and

Fi

lter-S

ilenc

ers

12

34

56

78.10

8

CCS/CS SeriesFilter-Silencers

CCF/CF Series Filters

¹⁄₂

³⁄₄

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

4 (NPT)4 (flanged)5 (NPT)5 (flanged)6810121416

P(size)

1522356075

120190275375500500750750

1,1002,2003,0004,3005,9007,700

RatedFlowCap.

(CFM)

8.008.008.009.009.009.00

13.4413.4413.4413.4413.4413.4413.4418.0020.0024.0024.0030.0030.00

D

3.133.133.133.503.503.506.756.756.756.756.756.756.759.50

18.0011.5011.5015.4415.44

H

6.006.006.006.506.506.50

10.0010.0010.0010.0010.0010.0010.0014.0014.0018.0018.0024.0024.00

B

———

1.001.001.131.134.001.814.004.004.004.004.004.004.00

N L Approx. Weight with Paper Elements

CCF CCS CF CS CCF CCS CF CS CCF CCS CF CS

——————

1.001.001.131.133.001.813.003.003.003.003.003.003.00

———

1.001.001.131.134.001.814.004.004.004.004.004.004.00

——————

1.001.001.131.133.001.813.003.003.003.003.003.003.00

3.503.503.507.507.507.637.63

10.508.38

10.5013.3121.8815.3815.3819.3819.38

6.506.506.507.887.887.88

17.6917.6917.6917.6919.6318.2519.5625.2533.8829.2529.2536.2536.25

3.503.503.507.137.137.257.25

10.138.00

10.1312.7521.3814.1914.1918.2518.25

6.506.506.507.887.887.88

17.3117.3117.3117.3119.2517.8819.1324.7533.3828.1328.1335.0635.06

998

111013121412163143526497

101

777

1010101918201921192343568391

143145

555

109

1211131115233041487579

777998

1817191820182235436775

121123

UseCCS

Series

Use CS

Series

Use CCS

Series

Use CS

Series

Use CCS

Series

Use CS

Series

Noise Attenuation, CCS/CS

58

101214141414

63125250500

1,0002,0004,0008,000


Pressure Drop, All Models

0.71.62.84.46.3

50%75%

100%125%150%

Pressure Drop(in. of H20)

Percentage of Rated Flow

All models have a ¹⁄₈" FNPT tap for installation of a gauge or manometer to monitor pressure drop. Sizes ¹⁄₂" through 3¹⁄₂" are standard with female pipe thread connection(FNPT). Sizes 4" and 5" are available with female threads or flanges. Please specify “threaded” or “flanged” when you order 4" and 5" sizes. Sizes 6" through 16" are standardwith 150# ANSI drilled plate flanges. Rated capacity is based upon exit velocity of approximately 5,500 ft/min. If pressure drop allowance permits, capacity may be increasedby as much as 50%.

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.11

Filte

rs a

nd

Filte

r-Sile

ncer

s1

23

45

67

8.11

8

CCS/CS/CCF/CFFilter Elements

Pleated Paper ElementSpecifications

High-quality industrial grade filterpaper—pleated and oven-cured duringproduction.Oven-cured plastisol end caps withmolded sealing beads.Media efficiency: 99.5% on 2 microns; 97% on 1 micron.Maximum operating temperature: 200°Ffor units with ¹⁄₂" through 16" pipe sizes.

Service InstructionsBecause of the low cost of the paperelement, it is generally treated as aconsumable and replaced when dirty.However, depending on customerpreference, the paper element may becleaned with compressed air and reused.

Compressed Air CleaningCarefully direct compressed air (100 PSImaximum) through the dry element,opposite the normal direction of flow. Aftercleaning, inspect carefully for holes orcracks. If damaged, replace element.

Pleated Felt ElementSpecifications

Durable polyester felt media—pleated.Oven-cured plastisol end caps withmolded sealing beads (larger elementsfor pipe sizes 10", 12", 14", and 16" havemetal end caps with closed cell rubbergaskets).Media efficiency: 99% on 10 microns.Maximum operating temperature: 200°Ffor units with ¹⁄₂" through 8" pipe sizes,250°F for units with 10" through 18" pipesizes using elements with metal end caps.

Service InstructionsPleated felt elements may be cleaned withcompressed air (as described for paperelements) or water and reused.

Water CleaningRap gently to dislodge accumulated dirt,soak thoroughly approximately 15 minutesin warm water and mild detergent. Rinsethoroughly under low pressure water. Airdry—do not dry with compressed air. Aftercleaning, inspect carefully for holes orcracks. If damaged, replace element.

Wire Mesh ElementSpecifications

Galvanized wire-mesh media—corrugated construction.May be cleaned and reused indefinitely.Wire mesh elements are considered“roughing” filters and are notrecommended for applications whichrequire efficient filtration of fine particles.Approximate efficiency: 93% on 10microns. Efficiency will vary withelement oil or adhesive coverage.Maximum operating temperature: 200°F for ¹⁄₂" through 16" with oil-freeadhesive (flash point of adhesive is235°F) and 300°F for ¹⁄₂" through 16"without adhesive.

Service InstructionsNew elements are delivered pre-treated with B&W Universal’s oil-free adhesive. See the back page for details. For best efficiency, wire mesh elements must be retreated after each cleaning. Spray the element on both sides with B&W Universal Oil-Free Adhesive, P/N 81-0323, following the directions on the container. For oil treatment, dip the element in SAE 30–50 motor oil and drain thoroughly before using.

CleaningTo clean wire mesh elements, wash in solvent or warm water and detergent in a container large enough for complete immersion of element. Rinse completely, drain, and either air dry or use compressed air. After cleaning and drying, retreat the element with oil-free adhesive or oil as described.

Three types of filter elements are availablefor Universal’s cartridge filters and filter-silencers. Pleated paper elements providethe highest efficiency and are consideredstandard. Pleated felt and wire meshelements are available for less demandingservice with respect to efficiency. The threetypes of elements are completelyinterchangeable and will fit all CCS, CS, CFor CCF filter housings.

¹⁄₂

³⁄₄

11¹⁄₄

1¹⁄₂

22¹⁄₂

33¹⁄₂

4568

10121416

P(Nom.)

81-047081-047081-047081-047181-047181-0471

81-1063, 81-0472 (old)81-1063, 81-0472 (old)

81-106381-1063

81-1063, 81-0474 (old)81-047581-0475 (2)81-116381-116381-116481-1164

Replacement Element Part Number

Paper Felt Wire Mesh

81-120281-120281-120281-120381-120381-1203

81-1205, 81-1204 (old)81-1205, 81-1204 (old)

81-120581-1205

81-1205, 81-1206 (old)81-120781-1207 (2)81-120981-120981-121081-1210

81-103581-103581-103581-103681-103681-1036

81-1038, 81-1037 (old)81-1038, 81-1037 (old)

81-103881-1038

81-1038, 81-1039 (old)81-1040

81-1040, (2) 81-1199 (old)81-120081-120081-120181-1201

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.12Fi

lters

and

Fi

lter-S

ilenc

ers

12

34

56

78.12

8

ILF/ILFS SeriesIn-line Filters

Durable ConstructionCarbon steel construction with a high-quality blue enamel finish.Easily removable top cover plate for access and servicing of the filter element.ASME Code construction and special materials (stainless steel) are available.

B&W Universal's ILF and ILFS Series of in-line air filters are designed to withstand the demanding requirements of pressure and vacuum applications. The ILF and ILFS filters come in standard sizes ranging from 3" to 18", with flow capacities from 275 to 9,700 CFM. Three types of filter elements are offered: pleated cellulose, pleated felt, or wire mesh media.

A

Y

C

L

4

D

Lift Handle

RemovableTop Plate

Filter Element

³⁄₄" NPT Drain

¹⁄₄" Pressure TapK

PR

R

P

3

inlet

inlet

K K

A

C

Lift Handle

RemovableTop Plate

Filter Element

¹⁄₄" Pressure Tap

³⁄₄" NPT Drain

P

R R

3

PY

L

ILF Series ILFS Series

ILF-3ILF-4ILF-5ILF-6ILF-8ILF-10ILF-12ILF-14ILF-16ILF-18ILFS-3ILFS-4ILFS-5ILFS-6ILFS-8ILFS-10ILFS-12ILFS-14ILFS-16ILFS-18

Model

34-A03-TT*34-A04-AA*34-A05-AA*34-A06-AA*34-A08-AA*34-A10-AA*34-A12-AA*34-A14-AA*34-A16-AA*34-A18-AA*34-B03-TT*34-B04-AA*34-B05-AA*34-B06-AA*34-B08-AA*34-B10-AA*34-B12-AA*34-B14-AA*34-B16-AA*34-B18-AA*

Part Number

34568

101214161834568

1012141618

P(nom.)

1414141618222228303014141416202424303636

D

24¹⁄₄

24¹⁄₄

25¹⁄₄

2839¹⁄₂

35¹⁄₂

37¹⁄₂

4143³⁄₄

43³⁄₄

23232327353437444852

L

—³⁄₈

³⁄₈

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

—³⁄₈

³⁄₈

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

¹⁄₂

R

15¹⁄₂

15¹⁄₂

1618¹⁄₄

28¹⁄₄

2223272829555¹⁄₂

678¹⁄₂

101112¹⁄₂

13

Y

2727283445424452555729292936444447586266

C

2020202224282834363620202022263030364242

A

1111111213151518191911111112141616192424

K

100110120120140295315450500505115125130170245365395605895945

Weight(est.)

275500750

1,1001,9203,0004,3005,9007,7009,700

275500750

1,1001,9203,0004,3005,9007,7009,700

RatedCap.

(CFM)

888881212121212888881212121212

Number ofBolts

The C dimension is clearance required to remove elements. Non-ASME code construction is suitable for 15" PSI maximum working pressure or 20" Hg operating vacuum.Estimated weight does not include elements. Size 3" is standard with male pipe thread connection (MNPT). Sizes 4" through 18" are standard with 125/150 lb ANSI drilled plateflanges. Rated capacity is based upon flow velocity of approximately 5,500 ft/min. If pressure drop allowance permits, capacity may be increased by as much as 50%. Refer topage 8.14 for filter element details.

*Specify “P” at end of part number for unit with pleated paper elements, “F” for pleated felt or “W” for wire mesh.

Customize to Your ApplicationOptional design features for special production and assembly conditions are available.Choose an ILF model for an "L" configuration, or an ILFS for opposed connections.Interchangeable cellulose, felt or wire media elements for desired filtration efficiency and service life. Built in taps to accommodate pressure gauges.

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.13

Filte

rs a

nd

Filte

r-Sile

ncer

s1

23

45

67

8.13

8

ILFV SeriesVacuum Service In-line Air Filters

All models have a 1/8" FNPT for installation of a gauge or manometer to monitor pressure drop.The "C" dimension is clearance required to remove filter elements.Non-ASME Code construction is suitable for 15" Hg. Vacuum.Not applicable for pressure applications.Rated capacity is based on flow velocity of approximately 5,500 ft/min.If pressure drop allowance permits, capacity may be increased by as much as 50%.Sizes 5" through 14" flange are standard with plate flanges, drilled per ANSI Standard for each size.Sizes 2" through 4" are standard with Male Pipe Threaded Inlet and outlet (MNPT).Weight does not include filter elements. See Filter Element section for details.

*Specify "P" at the end of the Part Number for Paper Element, "F" for synthetic felt media, or "W" for wire mesh media.

Filter ElementsPleated cellulose media elements offer the highest filtering efficiency and are considered as standard. Pleated felt media filter elements are offered for less demanding applications. Both element types are completely interchangeable, and will fit any size ILFV filter. See element and accessories page for replacement element part numbers.

Optional Filter Restriction GaugeB&W Universal 81-1234 filter restriction gauge provides a convenient, accurate means of monitoring filter restriction as the filter element is increasingly loaded with contaminant. In-line filters are standard with threaded connections for direct mounting of the restriction gauge.

B&W Universal’s ILFV Series of In line air filters are designed to provide an economical alternative to the ILF Series. Ten Standard connection sizes are available ranging from 2” to 14” with flow ratings from 120 to 5,900 CFM. There are three choices of filter elements available, Pleated Cellulose, Pleated Felt, or Wire Mesh. See the diagram below for additional information.

ww

w.babcock

.com

/universal

Rota

ry P

ositi

ve

Blow

er S

ilenc

ers

8.14Fi

lters

and

Fi

lter-S

ilenc

ers

12

34

56

78.14

8

Filter Elements

34568

1012141618

81-106381-106381-106381-047581-0475 (2 req'd)81-116381-116381-116481-116481-1164

81-120581-120581-120581-120781-1207 (2 req'd)81-120981-120981-121081-121081-1210

81-103881-103881-103881-104081-1040 (2 req'd)81-120081-120081-120181-120181-1201

P Size(nom.) Pleated Cellulose Felt Wire Mesh

ILF/ILFS Series

22¹⁄₂

34568

101214

81-106381-106381-106381-106381-047581-0475 (2 req'd)81-116381-1163 (2 req'd)81-116481-1164 (2 req'd)

81-120581-120581-120581-120581-120781-1207 (2 req'd)81-120981-1209 (2 req'd)81-121081-1210 (2 req'd)

——————————

P Size(nom.) Pleated Cellulose Felt Wire Mesh

ILFV Series

Oil Free AdhesiveThis is an oil-free product developed for use on viscous impingement type filters. It is a substitute for applications that do not permit oil wetting of the filter elements, such as oil-free compressors. B&W Universal Oil-Free Adhesive is available in 13 oz. aerosol spray cans.

Filter Restriction GaugeThe Filter Restriction Gauge provides a convenient, accurate means of monitoring filter pressure drops as the filter element becomes increasingly loaded with dirt. Cartridge Filters and Filter silencers are standard with threaded connections for direct mounting of the gauge.

81-0323

81-1234

ww

w.babcock

.com

/universal

UNIVERSAL

E501-1002 7J

B&W Universal is a subsidiary of The Babcock & Wilcox Company (B&W). Established in 1867, B&W is a global leader in advanced energy and environmental technologies and services for the power, industrial and renewable markets, with operations, subsidiaries and joint ventures worldwide.

For more information or to contact us, visit our website at www.babcock.com/universal.

Babcock & Wilcox Universal1925 Highway 51 - 138Stoughton, Wisconsin, U.S.A. 53589Phone: +1 888.300.4272

www.babcock.com/universal

The information contained herein is provided for general information purposes only and is not intended nor to be construed as a warranty, an offer, or any representation of contractual or other legal responsibility.

© 2017 Babcock & Wilcox Universal, Inc. All rights reserved.

ENERGY | ENVIRONMENTAL

full-line industrial catalog - turtle

Documents