Catalog AH-630

TANK HEATERSArmstrong tank heaters arewidely used in breweries,chemical and food process-ing plants, oil refineries,paper mills, tank storagefarms and in shipping andother industries.

Table of Contents

Why Armstrong Tank Heaters are Tougher on the Job 3

Technical Data and Dimensionsl FHC & FHS - Flange Mounted Hairpin. FBC & FBS - Flange Mounted Bayonetl BHC & BHS - Base Mounted Hairpinl BD - Base Mounted Direct

Features / Benefits of Armstrong Tank Heaters 8-9

Tank Heat Loss Data 10

Performance of Armstrong Tank Heaters 11

Basic Formulas and Useful Conversions 12

Tank Heater Selection Example 13

Tank Heater Selection Work Sheet 14

Model Number Selection 15

0 1998 Armstrong-Hunt, Inc.Designs and materials are subject to change without notice.

2

Tougher on the JobArmstrong tank heaters are built to withstand rigorousdemands encountered in industrial installations. Theheavy-duty features of our units were developed inresponse to a need for tank heaters that could provideefficient heat transfer without sacrificing structuralintegrity. These features include heavy-wall pipes andheaders, thick L footed fins and all welded construction.In addition, the mono-metallic construction of our unitsprecludes galvanic corrosion and the finned surface isrigid enough to withstand high pressure cleaning.

Experience gained over eighty years backs everyArmstrong tank heater. As a steam system specialist,your Armstrong representative can provide assistanceon everything from the boiler to the condensate returnsystem.

Quality products from Armstrong and the practicalknowledge to integrate them into your total steamsystem ensure an efficient and trouble-free installation.

Efficient heat transfer.

Finned pipe tank heaters are easier than bare pipe unitsto install, remove and repair. They are also morecompact and provide superior efficiency in productheating. Finned pipe tank heaters provide up to 10times as much heat transfer as an equivalent length ofbare pipe resulting in lower film or ‘skin’ temperatures.This reduces coking of the product on the heat transfersurface and discoloration of heat sensitive products.This build-up of deposits on the heater requires that

more frequent cleanings be carried out to maintainmaximum efficiency and original heat transfer designconditions.

The helically wound finned pipe is best suited for hori-zontal units with the fins being in the vertical plane. Thisincreases the natural convection currents, which in-creases heat transfer and continuously wipes the coilsurface to maintain cleanliness.

Options to match your applications.

Armstrong tank heaters are available in four standardconfigurations:

l Flange Mounted Hairpin - Types FHC and FHS0 Flange Mounted Bayonet - Types FBC and FBS*Base Mounted Hairpin - Types BHC and BHS*Base Mounted Direct - Type BD

These four configurations offer a range of choices to suitmost area coverage and thermal performance require-ments. Each type includes a number of length, widthand fin pitch options. All units are available in seamlesscarbon steel pipe construction. The hairpin and bayonettypes are available in stainless steel. Liquid heatedunits and custom designs are also available.

Critical to the heating and maintenance of temperaturesfor a broad variety of products, Armstrong tank heatersare widely used in breweries, chemical and food pro-cessing plants, oil refineries, paper mills, tank storagefarms and in shipping and other industries.

From left to right, Base Mounted Hairpin, Flange Mounted Bayonet, Flange Mounted Hairpin and Base Mounted Direct.

F l a n g e M o u n t e d H a i r p i n T y p e F H C a n d F H S

Overall= "L" + 12%”

Standard Sizes

m*I

TYPE

q, I . 1

TYPE T mA

BE/l:,1B

[ia)-

3%

-

5 VI6

-nst-:ru(

5 FPI

7 790

103116129142-155168181135161187213239265291317343

FHS-2 8FHC-2

FHS-4:HC-4 10 i%6

,.I , __.. , .__ , 126 1315 143.8 1 55.5 1 67.21 132 1 138 1 144

Mater15 of ConstructionPipes: lti" NPS Sch. 10, 304L SS (1.66" OD x 0.109" Wall)Fins: 0.020” Thick Helically Wound 304 SS ‘L’ FootReturn Bends: A-403 Long Radius 304 L SS Sch. 10

Mechanical Design: 450 psig, 650 “F, Hydro Test 675 psi

Pipes: 1%" NPS Sch. 80 Seamless Steel(1.66" OD x 0.191" Wall)Fins: 0.036” Thick Helically Wound Steel ‘L’ FootReturn Bends: A-234 Long Radius Forged Steel Sch. 80Mounting Flange: A-l 05 Forged Steel, 150 lb Raised FaceMechanical Design: 450 psig, 650 “F, Hydro Test 675 psi

4

Flange Mounted Bayonet Type FBC and FBS

Overall = “L” + 16”

L YE” x 2” Long Slot

Standard Sizes

’ MPT

N P E FlatgeB C Nominal Surface Area (sq ft) Weight (Ibs)

Size (in) (is) ( l a ) L~#h 3 FPI 4 FPI 5 FPI 3 FPI 4FPI 5 FPI

2 5.8 7.4 9.1 33 34 353 8.7 11.2 13.6 39 41 424 11.6 14.9 18.1 45 47 505 14.5 18.6 22.7 51 54 57

:BC-125 4 3A 3A 6 17.4 22.3 27.2 57 60 647 20.3 26.0 31.8 63 67 728 23.2 29.8 36.3 69 74 799 26.1 33.5 40.8 75 80 86

10 29.0 37.2 45.4 81 87 932 7.9 10.1 12.3 50 52 543 11.8 15.1 18.4 59 62 654 15.7 20.2 24.6 67 71 755 19.7 25.2 30.7 76 81 86

:BC-200 6 1 1 ; 23.6 30.2 36.9 85 91 9627.6 35.3 43.0 94 101 107

8 31.5 40.3 49.2 102 110 1189 35.4 45.4 55.3 111 120 128

10 39.4 50.4 61.5 120 130 1392 9.2 11.8 14.3 60 62 653 13.8 17.7 21.5 72 75 794 18.4 23.5 28.7 84 89 945 23.0 29.4 35.8 97 102 108

:BC-250 6 lvil6 27.6 35.3 43.0 109 115 1237 32.2 41.2 50.2 121 129 1378 36.8 47.1 57.4 133 142 1519 41.4 53.0 64.5 145 155 166

10 46.0 58.9 71.7 158 168 180

lrlaterials of Construction:BC-125 Pipes: 1%” NPS Sch. 40 Seamless Steel (1.66” OD x 0.140” Wall:BC-200 Pipes: 2” NPS Sch. 40 Seamless Steel (2.375” OD x 0.154” Wall):BC-250 Pipes: 2Y2” NPS Sch. 40 Seamless Steel (2.875” OD x 0.203” Wail):ins: 0.036” Thick Helically Wound Steel ‘L’ Footnner Distributing Pipe: Sch 80 A-53F Steelind Caps: A-234 Forged Steel Sch. 40fiounting Flange: A-l 05 Forged Steel, 150 lb Raised Facetiechanical Design: 450 psig, 650 “F, Hydro Test 675 psi

(Note: Sch 80 Construction is Available)

ANPE F lange

Size (in

:BS-125 4

:BS-200 6

:BS-250 6

IB

in)-

8 23.8 30.1 36.4 72 76 799 26.8 33.8 40.9 77 81 85

1 10 1 29.8 1 37.6 1 45.5 1 83 1 87 1 911 2 1 6.9 1 8.7 1 10.5 1 46 1 47 1 48

3 10.4 13.0 15.7 53 54 564 13.8 17.4 31 0 59 61 635 17.3 21.7 26.2 66 69 716

' 720.7 26.1 31.5 73 76 7824.2 30.4 36.7 80 83 86

8 27.6 34.8 42.0 86 90 949 31.1 39.1 47.2 93 97 101

10 34.5 43.5 52.5 100 105 109

Materials of ConstructionFBS-125 Pipes: 1%” NPS Sch. 10, 304LSS (1.66” OD x 0.109” Wall)FBS-200 Pipes: 2” NPS Sch. 10, 304L SS (2.375” OD x 0.109” Wall)FBS-250 Pipes: 2% ” NPS Sch. 10,304L SS (2.875” OD x 0.120” Wall)Fins: 0.020” Thick Helically Wound 304 SS ‘L’ FootInner Distributing Pipe: Sch 10, 304L SSEnd Caps: A-403,304L SS, Sch 10Mounting Flange: A-l 82,304L SS, 150 lb Raised FaceMechanical Design: 450 psig, 650 “F, Hydro Test 675 psi

(Note: Type 316L SS Construction is Available)

5

Base Mounted Hairpin Type BHC and BHS

2’/8,, r- Overall =“L” + 13” ~7

1) 15 ft. and 20 ft. units have center supports.II

2) Header ends are beveled for on-site butt welding.

Standard Sizes

20 355 456 557 570 660 7495 118 152 186 208 238 268

BHC-8 22 1 3 % 10 237 304 371 389 449 508,5 355 456 557 576 666 75520 473 608 742 757 877 995

5 148 190 232 258 295 332B H C - 1 0 2 4 16% ” 296 380 464 484 559 633

15 444 570 696 717 830 94120 592 760 928 943 1093 1241

Materials of Construction

Pipes: 1 Vi” NPS Sch. 40 Seamless Steel (1.66” OD x 0.140” Wall)Fins: 0.036” Thick Helically Wound Steel ‘L’ FootHeaders: 2” NPS Sch. 40 seamless steel (2.375” OD x 0.154” Wall)Return Bends: A-234 Long Radius Forged Steel Sch. 40Mechanical Design: 450 psig, 650 “F, Hydro Test 6 7 5 psi

(Note: Sch. 80 Construction is Available)

m, .TYPE

BHS-4

BHS-6

BHS-8

BHS-10

m:linimumYlanhaleSize (in)

16

18 10%

22

24 16 !‘z

wW

(in)

Weight (Ibs)

299 328 357l-l_-440 484 527575 633 691

Materials of Construction

Pipes: 1%” NPS Sch. 10, 304L SS (1.66” OD x 0.109” Wail)Fins: 0.020” Thick Helically Wound 304 SS ‘L’ FootHeaders: 2” NPS Sch. 40, 304L SS (2.375” OD x 0.154” Wall)Return Bends: A-403 Long Radius 304L SS Sch. 10Mechanical Design: 450 psig, 650 “F, Hydro Test 675 psi

(Note: Type 316L SS Construction is Available:

Base Mounted Direct Type BD

Overall = “L” + liti” - 1) 15ftand20ftunitshavecentersupporis.2) Header ends are beveled for on-site butt welding.

Standard Sizes

TYPE

BD-2

ED-3

BD-4

ED-5

Materials of Construction

Surface Area (s 19 ff)3FPI 4FPI

30 3859 7689 114

118 15245 5789 114

134 171178 22859 76

118 152I?? 228237 30474 95

148 190222 285296 380

5 FPI4 7

93140186

70139209278

93186279371116232348464-

Weight (Ibs)

3 FPI

60104156201

86154227295112203298j8&138251369482-

4FPI 5FP

68 75121 135179 201231 26197 109

177 199261 294340 384127 142233 262343 388449 508157 175288 325425 481557 631

Dipes: 1%” NPS Sch. 40 Seamless Steel (1.66” OD x 0.140” Wall)-ins: 0.036” Thick Helically Wound Steel ‘L’ Footieaders: 2” NPS Sch. 40 Seamless Steel (2.375” OD x 0.154” Wallrllechanical Design: 450 psig, 650 OF, Hydro Test 675 psi

(Note: Sch. 80 Construction is Available)rhese units are available only in Carbon Steel

7

Armstrong Tank HeatersApplication FlexibilityFour types of tank heaters are offered in severalmaterials and sizes to suit your specific requirements.

Space SavingsFlange mounted heaters are installed onvarious standard manhole sizes. Yousave internal space because only theheating element itself is inside. Steamand condensate connections areoutside of the tank.

eat Transfer Efficienttiff, helically wound L fin

design for an efficient and longlasting heat transfer surface.

Vertical fin surface providesuniform heating of liquid with aminimum of coking due to hotspots.

/

urability Over Long LifePipes and headers are of heavyconstruction (minimum Sch 40 pipefor steel and Sch 10 for stainlesssteel). Greater thickness means astronger, more corrosion resistantdesign which lasts longer.

Corrosion ResistancePipes, headers and connections are welded togetherfor a tough, single material joint. Eliminating dissimi-lar materials precludes galvanic corrosion, therebylengthening service life.

Base Mounted Hairpin Types BHC and BHS show

.-

Minimum Installation WeldingArmstrong base mounted tank heaters are installed andremoved easily through manholes, eliminating the needfor time-consuming welding inside the tank.

- Fast, D irect ConnectionHeaters are ready for connection to the steam andcondensate systems as supplied. Numerous types ofconnections are available.

- Base mounted heaters come with supports to allow for aproper distance between the tank bottom and the heatingsurface. This also helps to minimize the need for internalwelding. Longer units are provided with mid-supportmembers to further minimize inside welding and ensurerigid footing.

9

Tank Heat LOSS Data (Conditions are uninsulated and zero wind velocity)

7 0 0

6 0 0

5 0 0

4 0 0

3 5 0

3 0 0

2 5 0

2 0 0

1009 08 0

7 0

6 0

5 0

30 40 50 60 70 80 90 100

Ambient Air Temp “F

Note: If the tank contents need to be heated up before thedesired maintenance temperature is reached, calculate tankheat loss at the average tank temperature and add thefollowing heatup load (Btu/hr).

Wtof Fluid (lb) x S. H. (Btu/lb/"F) x [Maint. Temp "F - Initial Temp "F]HeatupTime

The resulting unit, when heatup load is provided for, willeasily hold tank temperature once it has been attained.

Tank Wall Area (sq ft) = 3.142 x Diameter (ft) x Length

Roof Area (sq ft) = 0.785 x Diameter2

Capacity(U.S. Gallons) = 5.874 x Diameter’ x Length

Capacity (Bbl) = 0.14 x Diameter* x Length

Wind Velocity Correction(uninsulated tanks only)

5 mph 1.80

10 mph 2.26

15 mph 2.62

20 mph 2.91

25 mph 3.16

30 mph 3.38

Insulation Thickness Correction

1 I, 0.20IV*” 0.15

2" 0.10

3" 0.08

Roof Heat Loss Rate = 0.5 x Wall Loss Rate

Heat Loss From Liquid SurfaceIn Open Top Tank (Still Air At 60 “F)

Btulhrlsq ft Surface

TankTemp “F

90100110120130140150160170180190200300400

WaterSurface

13020529040055071095012301600205026003300

OilSurface

1001351702052402753103453804154504858601450

70

Performance of Armstrong Tank Heaters

1000900800

700

600

500

400

300

200

1009080

IO98

7

6

I I I I I n I I I I -1

I Tf’= (0.75 x.Avg. L&id Temp. ; (0.25 xkteam TimD. “F) I \ I I

Approximate Viscosity ConversionTo Centistokes (CS)

Seconds Saybolt Universal (SSU)

A. SSU between 32 and 100CS = 0.226 SSU - 195 / SSU

B. SSU over 100cs = 0.220 ssu - 135 / ssu

Seconds Saybolt Furol (SSF)

A. SSF between 25 and 40CS = 2.24 SSF - 184 I SSF

B. SSF over 40CS = 2.16 SSF - 60 / SSF

Redwood No. 1 (Standard) SecondsA. Seconds between 34 and 100

CS = 0.260 Set - 179 / Set

B. Seconds over 100CS = 0.247 Set - 50 / Set

Redwood No. 2 (Admiralty) SecondsCS = 2.7 Set - 2000 I Set

Engler Time SecondsCS = 0.147 Set - 374 / Set

Engler DegreesCS = 7.79 Deg - 7 / Deg.

Centipoise = Centistokes x Sp. Gr.

Specific Gravity: Liquids Lighter7141.5 400 140

= “API t 131.5 = “BRIX t 400 = “Be+130

Specific Gravity: Liquids HeavierThan Water

145=_= “Tw t 200145-“B6 200

10 11 12 13 14 15 16 17 18 19 20

“u” Btu/hr (sq ft) (OF)

11

Basic Formulas - Tank Heaters

Tank Heater Surface Area Required (sq ft) = Total Heat Load (Btu/hr)

Where:Total Heat Load =

LMTD (Deg. F) =

=

U x LMTD

Heat Up Load (If Required) + Wall Losses + Roof (or Surface) Losses (Deg F)

Logarithmic Mean Temperature Difference

(Steam Temp - Initial Liquid Temp) - (Steam Temp - Final Liquid Temp)

log.? Steam Temp - Initial Liquid TempSteam Temp - Final Liquid Temp

If No Heat Up Is Required, Use MTD = Steam Temp- Maintenance Temp

Steam Consumption (Iblhr) = Heat Load Btu/hrLatent Heat of Steam (Btu/hr)

Length

Area

Volume

Mass

‘ressure

Velocity

mmMultiply

mmmininftftm2cm2in2m*/mft*/ftft’m3in3

ft3

@(US)

gal(lMP)litre

kglbPakPakPakPakPamm of waterin of waterin of waterin of waterft of waterm/smlminmi/hr (mph]ft/S

ft/min

mB Y

0.039370

3.28080.08333325.40012.0000.3048010.7640.155000.00694443.28080.304800.09290335.315 ft30.00057870 ft30.028317 m30.13368 ft31.2009 gal(US)0.26417 gal(US)2.2046 lb0.45359 kg0.0040147 in of water4.0147 in of waterD.33456 Ft of waterD.14504, lbf/in* (psi)0.29530 in of Hg0.039370 in of water0.24908 kPa0.036126 Ibf/in*

0.0024582 atmosphere!2.9890 kPa3.2808 fvs (fps)3.2808 ft/min (fpm)1.4667 ft/S

0.30480 m/s

0.016667 ft/S

To Obtaininftftmminmft*in*ft*ft*/ftmYmm*

j

MassFlow

VolumeFlow

Density

SpecificHeat

Energy

Power

Heat

Multiply<g/scg/hrb/sb/hr

m3ls

R3lS

RVminlitre/sUSGPM

kg/m3g/cm3lb/in3lb/n3

I

III

I11II

I,

II

II

III

\I1III

kJ/kg “Ckcallkg “CBtu/lb “F

kJkWhrkcaln Ibfhp hr3tu3tu3tuJ

Ntcal/hrR IbWhr

IPBtulhrBtulhr

kJ/kgBtulhr

12

BY

7936.6

2.20463600.00.45359

2118.960.0000.0004719515.8500.063092

ITo Obtain

Ib/hrIb/hrIb/hrkg/hr

ftYmin (cfm]ftYminmVsUSGPMlitre/s

0.06242862.4281728.016.018

0.238851 .oooo4.1868

I b/WI b/n3I b/n3kg/m3

Btu/lb “FBtu/lb “FkJ/kg “C

0.94782 Btu3412.1 Btu3.9683 Btu0.0012851 Btu2544.4 Btu1.0551 kJ0.0002931 kWhr0.25200 kcal0.00027778 W hr

3.4121 Btu/hr3.9683 Btu/hr0.0012851 Btu/hr2544.4 Btulhr0.29307 W0.25200 kcal/hr

0.42992 Btullb2.3260 kJ/kg

Temperature

1.8Ct32=F(F - 32)/l .8 = CC t 273.15 = KF + 459.69 = R

Fin Spacing

FPI = 25.4/mm Pitchmm Pitch = 25.4/FPI

Metric Equivalents

Pa = N/m2 = kg/s2 mN = kg m/s2J=WsLiter = dm3kp = kgfkplm2 = mm of waterBar=lOOkPaCentipoise = mPa.s

Tank Heater Se lect ion Examp le

1. Statement of Problem

A. Heat No. 5 fuel oil from 40°F 40 110°F in 24 hours.B. Continue to maintain 110°F in an uninsulated tank

with a wind velocity of 10 mph and an ambienttemperature of 10°F.

C. Tank is 48 ft. in diameter and 41 ft. high.D. Tank manhole diameter is 24 inches.E. Steam is available at 100 psig saturated (338°F).F. No. 5 fuel oil properties are:

1. Density at 75 “F = 7.83 lb/Gal.2. Specific heat = 0.41 Btu/lb/“F.3. Viscosity at 80 “F = 390 Centipoise.4. Viscosity at 160 “F = 25 Centipoise.

G. Carbon Steel Base Mounted Hairpin Units required(Type BHC).

II. Determine Heat Load

A.

B.

C.

D.

E.

Basic Data Calculations.1. Tank Capacity = 5.874 x Diameter* x Height =

5.874 x (48 ft)* x 41 ft = 554,882 U.S. Gallons.2. Weight of Fluid in Tank = Capacity x Density =

554,882 GAL x 7.83 lb/GAL = 4,344,726 lb.3. Average Liquid Temperature =

40°F + 110°F = “75°F2

4. Tank Wall Area = 3.142 x 48 x 41 = 6183 sq ft.5. Tank Roof Area = 0.785 x 48* = 1809 sq ft.

Heatup Load =Weight of Fluid x Specific Heat x Temp. Rise

Heatup Time4,344,726 lb x 0.41 Btu/lb/“F x 70 Deg. F

24 hr= 5,195,568 Btu/hr

Tank Wall Heat Loss1. For an average liquid temperature of 75°F

and an ambient temperature of 10°F.Wall Losses are 102 Btu/hr/sq ft.

2. Wind Velocity Correction Factor is 2.26.3. Wall Heat Loss = 102 Btu/hr/sq ft x 6183 sq ft

x 2.26 = 1,425,305 Btu/hr.

Tank Roof Heat Loss = 102 Btu/hr/sq ft x **.5 x1809 x 2.26 = 208,505 Btu/hr.

Total Heat Load = Heatup + Wall + Roof Losses =5,195,568 Btu/hr + 1,425,305 Btu/hr + 208,505Btu/hr = 6,829,378 Btu/hr.

13

II. Determine Tank Heater Fin Pitch and Surface Required

A. Basic Data Calculations1.

2.

3.

Film Temperature of Liquid at Fin Interface =(0.75 x Average Liquid Temperature) + (0.25 xSteam Temperature) = (0.75 x 75 “F) + (0.25 x338 “F) = 141 “F.Using a viscosity chart and the two points given,viscosity at film temperature 141 “F = 42Centipoise.Logarithmic Mean Temperature Difference(LMTD) between steam and liquid =(338” - 40”) - (338” - 110’) = 261.4 Deg. F

log, (338’=- 40”)(338” - 110’)

8.

C.

At a viscosity of 42cp a 4 Fins Per Inch surface isrequired yielding a heat transfer coefficient (U) of16.33 Btulhrlsq ftl”F.

Surface Area Required =Total Heat Load = 6,829,378 = 1600 sq ft

U x LMTD 16.33 x 261.4

IV. Determine Number and Size of Units to Do the Job

V. Determine Steam Consumption

A. Max. Stm. Consumption =

=

=

Total Heat LoadSteam Latent Heat6,829,378

8807761 Ib/hr

B. Maint. Stm. Consumption =

=

=

Wall and Roof LossesSteam Latent Heat1,633,810

8801857 Ib/hr

*

**

Note that if no heatup load is required, Average LiquidTemperature = Maintenance Temp. In this example,that would be 110°F.Roof Heat Loss Rate is 50% of Wall Heat Loss Rate.

A. Units RequiredIn order to give adequate coverage for this size oftank, a minimum of 4 units should be employed.Options would therefore be:(4) Four BHC-8-4FPI-15 Total Surface = 456 x 4 = 1824 sq R(5) Five BHCSQFPI-15 Total Surface = 342 x 5 = 1710 sq ft(6) Six BHC-4-4FPI-20 Total Surface = 304 x 6 = 1824 sq ft(6) Six BHC-8-4FPI-10 Total Surface = 304 x 6 = 1824 sq ftUltimate selection of the number of units depends uponthe degree of uniform heat distribution required.

Tank Heater Selection Work SheetTank Information Tank Reference Number

Tank TypeTank MaterialDimensions feetInsulated? if yes, how thick? inchesOpen Top?Tank Level (% full) or Fluid VolumeDesign Ambient Air Temperature “FDesign Wind Velocity (if outside and not insulated) - m p h

Steam information

Fluid Information

Steam Pressure - - - p s i gSaturated? if not, what temperature?

Type of FluidProperties (not required for water)1.

“F

Specific Gravity at “For Density Ib/cu ft at “For Density lb/US Gal at “FSpecific Heat Btu/lb/“F at “FViscosity (at least one value required, preferably two)units

at “Fat “F

2.3.

Heating Requirements A. Through Load USGPM at “F not applicableB. Heat-Up Load from “F to “F i n hours n o t a p p l i c a b l eC. Maintenance Load to Hold “FD. Total Heat Load (if known) Btu/hr

Tank Heater Requirements 1.

2.

Materials of ConstructionA. Carbon SteelB. Type 304L Stainless SteelC. Type 316L Stainless Steel

Type of UnitA. Flange Mounted (preference? Hairpin -Bayonet 1B. Base Mounted (preference? Hairpin -Direct )

if flange mounted, is std. flange size OK? _ i f n o t , s p e c i f y s i z e

Other Information

14

Model Number Se lect ion

FH n Flange Mounted HairpinFB w Flange Mounted BayonetBH w Base Mounted HairpinBD n Base Mounted Direct

S n 304L Stainless SteelNumber of Finned Pipes

For TypesFHC, FHS, BHC, BHS, BD

orPipe Size

For Types - FBC, FBS

15

Other Heat Transfer Products

Used for preheating of com-bustion air in utility/powerboilers (cold end temperaturecontrol), recovery boilers,MSW boilers, hog fuel boilers,etc. Coils are removable froman airtight outer case for easeof cleaning and maintenance.

Armstrong-Hunt air coolingunits can be supplied in mostmetals or combination ofmetals to suit particularprocess requirements. Forcooling liquids or condensingvapors using ambient air.

Armstrong manufacturesheavy-duty heating coils forindustrial applications. Bothsteam and liquid compatible,the coils are ideal for applica-tions requiring strength,durability and high-pressurecleanability. Armstrong coilscan be customized to meetsize and material requirementsfor your specific application.

Armstrong’s Industrial Unit/Door Heaters incorporate thesame heavy-duty cores as ourseries 6000 Coils. Featuresinclude standard industrialmotors, aluminum fans, heavy-gauge cabinets, fan guards, aselection of louvered and high&velocity discharges andseveral coating options.

Limited Warranty and RemedyArmstrong-Hunt, Inc. warrants to the original user that those productssupplied by it and used in the service and in the manner for which theyare intended shall be free from defects in materials and workmanshipfor a period of one (1) year after installation, but not longer than fifteen(15) months from date of shipment. Except as may be expresslyprovided for in a written agreement between Armstrong-Hunt, Inc. andthe user, which is signed by both parties, Armstrong-Hunt, Inc. DOESNOT MAKE ANY OTHER REPRESENTATIONS OR WARRANTIES,EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANYIMPLIED WARRANTY OF MERCHANTABILITY OR ANY IMPLIEDWARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.

The sole and exclusive remedy with respect to the above limitedwarranty or with respect to any other claim relating to the products orto defects or any condition or use of the products supplied byArmstrong-Hunt, Inc. however caused, and whether such claim isbased upon warranty, contract, negligence, strict liability or any othertheory, is limited to Armstrong-Hunt, Inc.3 repair or replacement of thepar-l or product, excluding any labor or any other cost to remove orinstall said part or product or, at Armstrong-Hunt, Inc.‘s option, torepayment of the purchase price. Notice of any such claim must begiven in writing to Armstrong-Hunt, Inc. within fifteen months after thefirst installation or use of the products. In no event shall Armstrong-Hunt, Inc. be liable for special, direct, indirect, incidental or consequen-tial damages, including, but not limited to, loss of use or profits or tointerruption of business activity.

*.ckng Armstrong-Hunt, Inc.

8100 Armstrong Road, Milton, Florida 32583 - USA Phone: (800) 292-2645 Fax: (850) 623-6255@z L

648 Moeller Street, P.O. Box 355, Granby, Quebec J2G 8E5 - Canada Phone: l-800-663-3889 Fax: (514) 375-3787

Steam Traps \ Humidifiers \ Steam Coils \Valves \ Water Heaters \ Pumping Traps \ Air Vents

www.armstrong-intl.com

Bulletin AH-630 2/98 Printed in U.S.A.