vibration isolation product selection guide for hvac...

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VIBRATION ISOLATIONProduct Selection Guidefor HVAC Equipment

Table of ContentsVibration Isolation and Control ................................................................................................................

EQUIPMENT TYPESRefrigeration Machines and Chillers .......................................................................................................Air Compressors and Vacuum Pumps ....................................................................................................Pumps .............................................................................................................................................................Axial, Plenum, Cabinet, and Centrifugal Inline Fans ...........................................................................Centrifugal Fans ...........................................................................................................................................Cooling Towers ............................................................................................................................................Boilers .............................................................................................................................................................Propeller Fans ..............................................................................................................................................Ducted Rotating Equipment ......................................................................................................................Packaged AH, AC, H and V Units .............................................................................................................Engine-Driven Generators .........................................................................................................................Heat Pumps, Fan Coils, Computer Room Units ....................................................................................Condensing Units ........................................................................................................................................Packaged Rooftop Equipment .................................................................................................................

PRODUCTSThe Fiberglass Advantage ........................................................................................................................ASHRAE TYPE 1: Fiberglass or Neoprene Pad ..................................................................................... KIP Fiberglass Pad | NP / NG, RSP Neoprene Pads, KIP-RT Isolation RailsASHRAE TYPE 2: Floor Isolator or Hanger ............................................................................................ AC Fiberglass Mount | RD, RDS, RQ Neoprene Mounts FH Fiberglass Hanger | RH Neoprene HangerASHRAE TYPE 3: Spring Floor Isolator or Hanger ............................................................................... FDS Free-Standing Isolator SFH Fiberglass Hanger | SRH Neoprene Hanger | SH HangerASHRAE TYPE 4: Restrained Spring Isolator ........................................................................................ TITAN | FMS | FLS | FLSS | FHSASHRAE TYPE 5: Thrust Restraints ......................................................................................................... HSRASHRAE TYPE 6: Air Mounts .................................................................................................................... KAM | CAM

KINFLEX Flexible Connectors ..................................................................................................................

BASE TYPE A: Direct Isolation ..................................................................................................................BASE TYPE B: Structural Rails ................................................................................................................... SBB | SFBBASE TYPE C: Concrete Inertia Base ..................................................................................................... CIBBASE TYPE D: Curb-Mounted Base ........................................................................................................ KSR | KSCR | ESR | ESSR

ESSR Sound and Vibration Curb ..............................................................................................................

Riser Supports, Anchors, and Guides .....................................................................................................

Seismic Restraint .........................................................................................................................................

Piping/Hanger Selection Data (U.S) ........................................................................................................Piping/Hanger Selection Data (SI) ...........................................................................................................

Isolation Notes for Specific Equipment ..................................................................................................

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Back

Vibration Isolation and Seismic Control Basics:Mechanical vibration and vibration-induced noise are common sources of occupant complaints in modern buildings. Vibration is caused by reciprocating motion from rotating components within mechanical equipment. All reciprocating, or rotating equipment should be isolated to reduce transmission of vibration into the structure. Kinetics Noise Control provides technical assistance in the selection and specification of tailor-made isolation systems and vibration isolation products that enable building owners to install complex heating, ventilation and air-conditioning systems without the worry of vibration problems.

If you have a Vibration Issue: Isolator deflections shown in the following pages are based on the data published in the 2015 ASHRAE Handbook. Recommended isolator type, base type, and minimum static deflection are reasonable and safe recommendations for most HVAC equipment installations. Additional assistance from one of our many qualified representatives or acoustical consultants can also be very useful in resolving these problems.

Engineering Expertise:Building codes are constantly updated with stricter requirements for seismic, wind and blast protection. Kinetics offers a complete line of restrained vibration isolators to satisfy current building code requirements as well as complete engineering support. Our highly skilled engineering staff focus on labor savings and constructability in line with current directions in mechanical construction. We offer streamlined and cost effective engineered solutions along with professional and structural engineering stamps to meet any specification requirements in all 50 states. Kinetics’ unsurpassed expertise will ensure success with highly complex hospital, gov-ernment and military projects as well as the unique challenges of design/build projects.

2

Equipment Type:

Refrigeration Machines and Chillers*

EquipmentCategory

Reciprocating

Centrifugal, scroll

Screw

Absorption

Air-cooled recip., scroll

Air-cooled screw

ASHRAEType

4

4

4

4

4

4

BaseType

A

A

A

A

A

B

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

4

4

4

4

4

4

BaseType

A

A

A

A

A

B

20 to 30 ft (6 - 9 m)

ASHRAEType

4

4

4

4

4

4

BaseType

A

A

A

A

A

A

Up to 20 ft (6 m)

ASHRAEType

2

1

1

4

1

4

BaseType

A

A

A

A

A

A

Slab on Grade

ASHRAE TYPE 1: Fiberglass or Neoprene PadSee page 12 for more details

KINETICS KIP Fiberglass PadKINETICS NP Neoprene PadKINETICS NG Neoprene Pad KINETICS RSP Neoprene Pad

IsolatorDefl.

2.50" (64)

1.50" (38)

2.50" (64)

1.50" (38)

2.50" (64)

2.50" (64)

IsolatorDefl.

1.50" (38)

1.50" (38)

2.50" (64)

1.50" (38)

1.50" (38)

2.50" (64)

IsolatorDefl.

0.75" (19)

0.75" (19)

1.50" (38)

0.75" (19)

1.50" (38)

1.50" (38)

IsolatorDefl.

0.25" (6)

0.25" (6)

1.00" (25)

0.25" (6)

0.25" (6)

1.00" (25)

KIP

ASHRAE TYPE 2: Floor Isolator or HangerSee page 13 for more details

KINETICS AC Fiberglass MountKINETICS RDS Neoprene MountKINETICS RQ Neoprene MountKINETICS FH Fiberglass HangerKINETICS RH Neoprene Hanger

RDS

ASHRAE TYPE 4: Restrained Spring IsolatorSee page 15 for more details

KINETICS TITANKINETICS FMSKINETICS FLSKINETICS FLSS

TITAN

BASE TYPE A: Direct Isolation

No base, isolators attached directly to equipment.

BASE TYPE B: Structural Steel Rails or BaseSee page 17 for more details

KINETICS SBB Structural Rail BaseKINETICS SFB Structural Beam Base

RSP FH

*Data from 2015 ASHRAE Handbook. See back cover for additional notes on Refrigeration Machines.

3

Equipment Type:

Air Compressors and Vacuum Pumps*

EquipmentCategory

Tank-mounted horizontal

≤10 HP

≥10 HP

Tank-mounted vertical

Base-Mounted

Large Reciprocating

ASHRAEType

3

3

3

3

3

BaseType

A

C

C

C

C

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

3

3

3

3

3

BaseType

A

C

C

C

C

20 to 30 ft (6 - 9 m)

ASHRAEType

3

3

3

3

3

BaseType

A

C

C

C

C

Up to 20 ft (6 m)

ASHRAEType

3

3

3

3

3

BaseType

A

C

C

C

C

Slab on Grade

IsolatorDefl.

1.50" (38)

1.50" (38)

1.50" (38)

1.50" (38)

1.50" (38)

IsolatorDefl.

1.50" (38)

1.50" (38)

1.50" (38)

1.50" (38)

1.50" (38)

IsolatorDefl.

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)

IsolatorDefl.

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)

ASHRAE TYPE 3: Spring Floor Isolator or HangerSee page 14 for more details

KINETICS FDS Free-Standing IsolatorKINETICS SL Housed IsolatorKINETICS SM Housed Isolator KINETICS SFH Fiberglass HangerKINETICS SRH Neoprene HangerKINETICS SH Hanger

FDS

BASE TYPE C: Concrete Inertia BaseSee page 17 for more details

KINETICS CIB



SFH

*Data from 2015 ASHRAE Handbook. See back cover for additional notes on Compressors.**For seismic & wind applications, use ASHRAE TYPE 4

4


KINETICS TITANKINETICS FMSKINETICS FLSKINETICS FLSSKINETICS FHS

TITAN

Equipment Type:

Pumps*

EquipmentCategory

Close-Coupled

≤7.5 HP

≥7.5 HP

Large Inline

5 to 25 HP

≥25 HP

End Suction/Split Case

≤40 HP

50 to 125 HP

≥150 HP

Packaged Pump Systems

ASHRAEType

3

3

3

3

3

3

3

3

BaseType

C

C

A

A

C

C

C

C

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

3

3

3

3

3

3

3

3

BaseType

C

C

A

A

C

C

C

A

20 to 30 ft (6 - 9 m)

ASHRAEType

3

3

3

3

3

3

3

3

BaseType

C

C

A

A

C

C

C

A

Up to 20 ft (6 m)

ASHRAEType

2

3

3

3

3

3

3

3

BaseType

B

C

A

A

C

C

C

A

Slab on Grade

IsolatorDefl.

0.75" (19)

1.50" (38)

1.50" (38)

2.50" (64)

1.50" (38)

2.50" (64)

3.50" (89)

2.50" (64)

IsolatorDefl.

0.75" (19)

1.50" (38)

1.50" (38)

1.50" (38)

1.50" (38)

1.50" (38)

2.50" (64)

1.50" (38)

IsolatorDefl.

0.75" (19)

0.75" (19)

1.50" (38)

1.50" (38)

0.75" (19)

0.75" (19)

1.50" (38)

0.75" (19)

IsolatorDefl.

0.25" (6)

0.75" (19)

0.75" (19)

1.50" (38)

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)




KINETICS SBB Structrual Rail BaseKINETICS SFB Structural Beam BaseKINETICS Inline Pump Stands


KINETICS CIB



FDS SFH


KINETICS AC Fiberglass MountKINETICS RD Neoprene MountKINETICS RQ Neoprene MountKINETICS FH Fiberglass HangerKINETICS RH Neoprene Hanger

RQFH

*Data from 2015 ASHRAE Handbook. See back cover for additional notes on Pumps.**For seismic & wind applications, use ASHRAE TYPE 4

5


KINETICS Inline Pump StandsKINETICS FMSKINETICS FLSKINETICS FLSSKINETICS FHS KINETICS TITAN

FHS Inline Pump Stand

Installation Video

Equipment Type:

Axial, Plenum, Cabinet, and Centrifugal Inline Fans*

EquipmentCategory

Up to 22 in. diameter

24 in. diameter and up

≤2.0 in. SP

Up to 300

301 to 500

500 and up

≥2.1 in. SP

Up to 300

301 to 500

500 and up

ASHRAEType

3

3

3

3

3

3

3

BaseType

C

C

C

B

C

C

C

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

3

3

3

3

3

3

3

BaseType

A

C

C

B

C

C

C

20 to 30 ft (6 - 9 m)

ASHRAEType

3

3

3

3

3

3

3

BaseType

A

C

B

B

C

C

C

Up to 20 ft (6 m)

ASHRAEType

2

3

3

3

3

3

3

BaseType

A

B

B

B

C

C

C

Slab on Grade

IsolatorDefl.

0.75" (19)

3.50" (89)

2.50" (64)

1.50" (38)

3.50" (89)

2.50" (64)

2.50" (64)

IsolatorDefl.

0.75" (19)

3.50" (89)

2.50" (64)

1.50" (38)

3.50" (89)

2.50" (64)

1.50" (38)

IsolatorDefl.

0.75" (19)

3.50" (89)

1.50" (38)

1.50" (38)

3.50" (89)

1.50" (38)

1.50" (38)

IsolatorDefl.

0.25" (6)

2.50" (64)

0.75" (19)

0.75" (19)

2.50" (64)

1.50" (38)

0.75" (19)

RP

MR

PM




KINETICS SBB Structrual Rail BaseKINETICS SFB Structural Beam Base


KINETICS CIB



FDS SFHASHRAE TYPE 2: Floor Isolator or HangerSee page 13 for more details

KINETICS AC Fiberglass MountKINETICS RD Neoprene MountKINETICS RDS Neoprene MountKINETICS RQ Neoprene MountKINETICS FH Fiberglass HangerKINETICS RH Neoprene Hanger

RDS FH

*Data from 2015 ASHRAE Handbook.**For seismic & wind applications, use ASHRAE TYPE 4

6

ASHRAE TYPE 4/TYPE 5: Restrained Spring IsolatorSee page 15 for more details

KINETICS TITANKINETICS FMSKINETICS FLSKINETICS FLSSKINETICS FHS KINETICS HSR (TYPE 5)

HSR

FH

Equipment Type:

Centrifugal Fans*

EquipmentCategory

Up to 22 in. diameter

24 in. diameter and up

≤40 HP

Up to 300

301 to 500

501 and up

≥50 HP

Up to 300

301 to 500

501 and up

ASHRAEType

3

3

3

3

3

3

3

BaseType

B

B

B

B

C

C

C

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

3

3

3

3

3

3

3

BaseType

B

B

B

B

C

C

C

20 to 30 ft (6 - 9 m)

ASHRAEType

3

3

3

3

3

3

3

BaseType

B

B

B

B

C

C

C

Up to 20 ft (6 m)

ASHRAEType

2

3

3

3

3

3

3

BaseType

B

B

B

B

C

C

C

Slab on Grade

IsolatorDefl.

1.50" (38)

3.50" (89)

2.50" (64)

1.50" (38)

3.50" (89)

2.50" (64)

2.50" (64)

IsolatorDefl.

0.75" (19)

3.50" (89)

2.50" (64)

0.75" (19)

3.50" (89)

2.50" (64)

1.50" (38)

IsolatorDefl.

0.75" (19)

3.50" (89)

1.50" (38)

0.75" (19)

3.50" (89)

1.50" (38)

1.50" (38)

IsolatorDefl.

0.25" (6)

2.50" (64)

1.50" (38)

0.75" (19)

2.50" (64)

1.50" (38)

1.00" (25)

RP

MR

PM




KINETICS CIB-LKINETICS CIB-HKINETICS CIB-SS



FDS SFH


KINETICS AC Fiberglass MountKINETICS RD Neoprene MountKINETICS RQ Neoprene MountKINETICS FH Fiberglass HangerKINETICS RH Neoprene Hanger

RQ


KINETICS TITANKINETICS FMSKINETICS FLSKINETICS FLSSKINETICS FHS KINETICS LDR

FHS

*Data from 2015 ASHRAE Handbook. See back cover for additional notes on Fans.**For seismic & wind applications, use ASHRAE TYPE 4***For curb mounted fans see BASE TYPE D

7

BASE TYPE D: Curb-Mounted BaseSee page 18 for more details

KINETICS KSR Isolation RailKINETICS KSCR Isolation CurbKINETICS ESR Isolation Curb

Equipment Type:

Cooling Towers and Boilers*

Cooling Towers

Up to 300

301 to 500

501 and up

Boiler Type

Fire-tube

Water-tube, copper fin

ASHRAEType

4

4

4

4

4

BaseType

A

A

A

B

B

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

4

4

4

4

1

BaseType

A

A

A

B

A

20 to 30 ft (6 - 9 m)

ASHRAEType

4

4

4

4

1

BaseType

A

A

A

B

A

Up to 20 ft (6 m)

ASHRAEType

1

1

1

1

1

BaseType

A

A

A

A

A

Slab on Grade

IsolatorDefl.

3.50" (89)

2.50" (64)

0.75" (19)

2.50" (64)

0.25" (6)

IsolatorDefl.

3.50" (89)

2.50" (64)

0.75" (19)

1.50" (38)

0.12" (3)

IsolatorDefl.

3.50" (89)

2.50" (64)

0.75" (19)

0.75" (19)

0.1 2" (3)

IsolatorDefl.

0.25" (6)

0.25" (6)

0.25" (6)

0.25" (6)

0.1 2" (3)



TITAN



KIP RSP





*Data from 2015 ASHRAE Handbook. See back cover for additional notes on Cooling Towers.

8

Installation Video

RP

M

KINETICS CTRCooling Tower Rails

Designed to fit between the cooling tower and the support strcuture, CTR significantly reduces vibration trans-mitted from the cooling tower to the structure below.

Equipment Type:

Propeller Fans and Ducted Rotating Equipment*

Propeller Fans

Wall-Mounted

Roof-Mounted

Ducted Rotating Equip.

Small fans,

fan-powered

boxes

ASHRAEType

1

4

3

3

BaseType

A

D

A

A

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

1

4

3

3

BaseType

A

B

A

A

20 to 30 ft (6 - 9 m)

ASHRAEType

1

1

3

3

BaseType

A

A

A

A

Up to 20 ft (6 m)

ASHRAEType

1

1

3

3

BaseType

A

A

A

A

Slab on Grade

IsolatorDefl.

0.25" (6)

1.50" (38)

0.50" (13)

0.75" (19)

IsolatorDefl.

0.25" (6)

1.50" (38)

0.50" (13)

0.75" (19)

IsolatorDefl.

0.25" (6)

0.25" (6)

0.50" (13)

0.75" (19)

IsolatorDefl.

0.25" (6)

0.25" (6)

0.50" (13)

0.75" (19)



TITAN



KIP RSP





FDS SFH

≤600 cfm

≥601 cfm

*Data from 2015 ASHRAE Handbook.

9



Equipment Type:

Packaged AH, AC, H and V Units; Engine-Driven Generators*

Horsepower and Other

≤10 HP

≥15 HP

≤4 in. SP

>15

>4 in. SP

ASHRAEType

3

3

3

3

3

3

3

BaseType

A

C

A

A

C

C

C

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

3

3

3

3

3

3

3

BaseType

A

A

A

A

C

C

C

20 to 30 ft (6 - 9 m)

ASHRAEType

3

3

3

3

3

3

3

BaseType

A

A

A

A

C

C

C

Up to 20 ft (6 m)

ASHRAEType

3

3

3

3

3

3

3

BaseType

A

A

A

A

B

B

B

Slab on Grade

IsolatorDefl.

0.75" (19)

3.50" (89)

2.50" (64)

1.50" (38)

3.50" (89)

2.50" (64)

2.50" (64)

IsolatorDefl.

0.75" (19)

3.50" (89)

2.50" (64)

1.50" (38)

3.50" (89)

2.50" (64)

1.50" (38)

IsolatorDefl.

0.75" (19)

3.50" (89)

2.50" (64)

1.50" (38)

3.50" (89)

1.50" (38)

1.50" (38)

IsolatorDefl.

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)

0.75" (19)

RPM

All

Up to 300

301 to 500

500 and up

Up to 300

301 to 500

500 and up

Packaged AH, AC, H, and V Units






KINETICS CIB



FDS SFH

*Data from 2015 ASHRAE Handbook. See Back for additional notes on Air-Handling Equipment.**For seismic & wind applications, use ASHRAE TYPE 4 ***For rooftop mounted equipment use BASE TYPE D

10



TITAN

Equipment Type:

Heat Pumps, Fan-Coils, Computer Room Units; Condensing Units; Packaged Rooftop Equipment*

EquipmentType

Heat Pumps, Fan-Coils, Computer Room Units

Condensing Units

Packaged Rooftop Equipment

ASHRAEType

3

4

N/A

BaseType

A/D

A/D

N/A

30 to 40 ft (9-12 m)

Equipment Location

Floor Span

ASHRAEType

3

4

N/A

BaseType

A

A

N/A

20 to 30 ft (6 - 9 m)

ASHRAEType

3

4

3

BaseType

A

A

D

Up to 20 ft (6 m)

ASHRAEType

3

1

1

BaseType

A

A

A/D

Slab on Grade

IsolatorDefl.

1.50" (38)

1.50" (38)

N/A

IsolatorDefl.

0.75" (19)

1.50" (38)

N/A

IsolatorDefl.

0.75" (19)

0.75" (19)

0.75" (19)

IsolatorDefl.

0.75" (19)

0.25" (6)

0.25" (6)

FDS SFH



KIP




KINETICS LDRKINETICS FHSKINETICS FHSLKINETICS CRAC

LDRRSP

*Data from 2015 ASHRAE Handbook. See back for additional notes on Packaged Rooftop Equipment.

11





ASHRAE TYPE 1: Fiberglass and Neoprene Pads

KINETICS KIP Fiberglass Isolation PadDescription: A high-density matrix of compressed molded fiberglass; individually coated with a flexible, moisture-impervious elastomeric membrane, designed to allow controlled air movement in the fiber media.

Application: Recommended as support mounts for high speed fans, pumps, and chillers, on grade, having operating speeds of 1750 RPM and higher.

Capacity: Provide load-bearing capacities from 5 to 500 PSI (0.35 to 35 kg per sq. cm) of pad surface area.

KINETICS KIP-RTIsolation RailsDescription: Elastomeric-coated, molded and precom-pressed fiber glass isolation strips

Application: Packaged Rooftop Equipment

Dimensions: 1.75" wide x 0.5" thick x 48" long

KINETICS NP / NG, RSPNeoprene Isolation PadsDescription: Single ribbed or crossed, double ribbed elastomer-in-shear pads, in combination with steel shims when required, having minimum static deflections as tabulated. Application: Isolate noise, shock, and high frequency vibration, generated by mechanical equipment and industrial machinery located on a grade-supported structural slab.

Capacity: NP/NG: Designed to permit 60 or 120 PSI (4.2 or 8.4 kg/cm2) loading at maximum rated deflec-tions. RSP: Designed to permit 60 psi (4.2 kg/cm2) loading at a maximum rated deflection of 0.15" (4 mm)

Dimensions: NP/NG pads are available in 4", 6", or 9" (102, 152, 228 mm) squares with capacities from 400 to 9,700 lbs. (181 to 4400 kg), or in full 18" (457 mm) square sheets which can be cut or drilled to meet field require-ments. RSP: 18" x 18" x 3/4" (457 mm x 457 mm x 19 mm) thick sheets, scored into 2" x 2" x 3/4" (51 mm x 51 mm x 19 mm) thick pads

Deflection: NP Pads 0.04" to 0.09" (1 mm to 2 mm) NG Pads 0.13" to 0.19" (3 mm to 5 mm)

The Fiberglass AdvantageKinetics Noise Control manufactures both fiberglass and neoprene isolators. Fiberglass isolators offer the following advantages:

• UV resistant for outdoor use Constant location performance through seasonal temperature changes• Varying densities and sizes to suit a variety of load requirements• Constant pad performance, unaffected by age or high temperatures• Ask local rep for fiberglass advantage demonstration

12

ASHRAE TYPE 2: Floor Isolator or Hanger

KINETICS AC Fiberglass Isolation MountDescription: A molded inorganic fiberglass isolation pad bonded to a steel load transfer plate and to a formed steel bolt-down bracket and include an equipment anchor bolt with a neoprene grommet to prevent metal-to-metal contact.

Application: Recommended for the isolation of vibration produced by utility ventilating fans, vane axial fans, high speed motors, roof-mounted exhaust fans, and similar mechanical equip-ment.

Capacity: 40 to 900 lbs. (18 kg to 409 kg)

Deflection: 0.18 in. to 0.70 in. (4 mm to 18 mm)

KINETICS RD, RDS and RQNeoprene Isolation MountsDescription: One-piece molded neoprene mounts with encapsulated metal inserts. Available in a housed seismic version.

Application: Recommended for the isolation of vibration produced by small pumps, vent sets, and low pressure packaged air-handling units.

Capacity: 55 lbs. to 4,000 lbs. (25 kg to 1814 kg)

Deflection: RD up to 0.5" (13 mm)RQ up to 0.13" (3 mm)

KINETICS FH Fiberglass Isolation HangerDescription: A coded, mold-ed, inorganic fiberglass iso-lation pad attached to a steel load transfer plate and to a stamped or welded hanger bracket.

Application: Recommended for the isolation of vibration produced by suspended mechanical or electrical equipment, in-line and exhaust fans, ductwork, or piping.

Capacity: 250 to 900 lbs. (18 kg to 409 kg)

Deflection: 0.18 in. to 0.27 in. (4 mm to 7 mm)

KINETICS RHNeoprene Isolation HangerDescription: A coded elatomer in-shear insert with a load plate, assembled into a stamped or weld-ed hanger bracket.

Application: Recommended for the isolation of vibration produced by suspended mechanical or electrical equipment, in-line and exhaust fans, ductwork, or piping.

Capacity: up to 2,000 Ibs (907 kg)

Deflection: 0.20" to 0.57" (5mm to 15 mm)

RQ

RD

13

RDS

KINETICS FDS Free-Standing Spring IsolatorDescription: A high deflection, free-standing, unhoused, large diameter, laterally stable steel springs assembled into an upper load plate and lev-eling assembly.

Application: Recommended for control of both high and low frequency vibration produced by reciprocating air or refrigera-tion compressors, pumps, packaged air-handling and air-conditioning equipment, centrifugal and axial fans, and internal combustion engines.

Capacity: 35 to 23,200 lbs. (16 kg to 10,523 kg)

Deflection: 1 in. to 4 in. (25 mm to 102 mm)

KINETICS SFH, SRH, SHSpring Isolation Hangers

Description: Free-standing, laterally stabile steel spring in series with a pre-compressed molded fiberglass insert (SFH), elastomer-in-shear insert (SRH), or elastomeric washer (SH) complete with a load plate (SFH/SRH only) and assembled in a stamped or welded steel bracket.

Hangers will allow support rod misalignment through a 30° arc without short-circuiting. Isolation brackets will carry a 500% overload without failure.

Application: Recommended for the isolation of vibration produced by suspended mechanical equipment, in-line fans, exhaust fans, cabinet fans, pumps, ductwork, and piping.

Capacity: 35 lbs. to 3,850 lbs. (16 kg to 1,747 kg)

Deflection: 1" to 2.40" (25 mm to 61 mm), and4.05 to 4.75” (104 mm to 112 mm)

SFHSH

SRH

ASHRAE TYPE 3: Spring Floor Isolator or Hanger

14

Patented No-Short Self-Centering Cap: Featured on 1" and 2" spring isolation hangers. Indexed steps in spring cap keep the washer and rod centered in the cap.

KINETICS FLS/FLSS Restrained Spring IsolatorsDescription: FLS/FLSS Free-standing, large diameter, laterally stable steel springs assembled into welded steel housing assemblies fabricated to limit vertical movement of the isolated equipment. The housings provide a constant free and operating height to facilitate installation.

Application: Recommended for the isolation of vibration produced by equipment carrying a large fluid load which may be drained, such as boilers and chillers, and for the isolation of outdoor components such as cooling towers and air-cooled condensers.

Capacity: up to 23,200 lbs. (10,523 kg)Deflection: up to 4 in. (102 mm)

KINETICS FMS (U.S. Patent No. 7,028,969)

Modular Restraint/IsolatorDescription: The unit is comprised of arestraint module and an optional vibration isolation module. This modular design allows the engineer to design for seismic or wind forces inde-pendent of the load and deflection requirements of the vibration isolator.

Application: Ideal for cooling towers, chillers, boilers or other equipment where the potential for wide weight variations during service is anticipated.


KINETICS FHS Restrained Spring IsolatorDescription: FDS Free-Standing Isolator with a steel housing assembly to limit lateral and vertical movement of the supported equipment during an earthquake without degrading the vibration isolation of the spring during normal equipment operating conditions.

Application: Recommended for mechanical equipment located near critically quiet areas when there is a possi-bility that the equipment to be isolated will be subjected to the external forces associated with an earthquake.


ASHRAE TYPE 4: Restrained Spring Isolator

15

KINETICS TITAN (U.S. Patent No. 9,316,279)

Vibration Isolator/RestraintDescription: Comprised of two interfacing but independent elements; two or more high deflection, free-standing, housed, large diameter, laterally stable steel springs, and a seismically rated housing.

The steel springs and elastomeric snubber element are each replaceable without having to lift or otherwise remove the supported equipment.

Application: Recommended for equipment mounted on a structural frame or concrete inertia base where the top plate of the isolator can be fully utilized.


KINETICS LDR Light Duty Rail SystemDescription: A low-cost solution designed to isolate residential style condensing units and other light weight equipment.

Application: Recommended for the isolation of rooftop condensing units to eliminate vibration from penetrating into the structure below and disturbing the occupants.

Capacity: up to 810 lbs. (10,523 kg)Deflection: 1" (25 mm)

KINETICS KAM and CAMAir Vibration Isolation Mounts

Description: Pneumatic, elastomeric vibration mounts. The CAM is available in four (4) sizes supporting loads up to 7,500 lbs. The KAM is available in seven (7) sizes with capacities from 500 to 22,000 lbs. per mount.

Application: Recommended for mechanical equipment and industrial process equipment requiring low natural frequency isolation, as well as protecting sensitive equip-ment from disturbing floor-borne vibration.

ASHRAE TYPE 5: Thrust Restraint

KINETICS HSRThrust Restraint

Description: A high deflection, large diameter, laterally stable steel coil spring assembled into a threaded rod and bracket assembly.

Application: Used to counteract the discharge force created by fans during operation. Recommended for all fan heads, suspended fans, and all base-mounted and suspended air-handling equipment operating at 2 inches or greater total static pressure (TSP). HSR Thrust Restraints are always installed in pairs and often work in conjunction with inertia bases for floor-mounted fans to counteract fan thrust.

Capacity: 35 to 1,975 lbs. (16 to 896 kg)

Deflection: 1 in. to 2 in. (25 mm to 51 mm)

ASHRAE TYPE 6: Air Springs

KINETICS KINFLEXFlexible ConnectorsDescription: Prevent stresses due to expansion and contraction, isolate against the transfer of noise and vibration, and compensate for misalignment.

Application: Used on both hot and chilled water circulation lines, suction and discharge sides of pumps, and header connections.

KINFLEX Seismic V-Loops solve the problems of pipe motion caused by thermal pipe growth and the movements associated with seismic activity. Seismic V-loops limit amount of space required for installation and hold in more heat then to traditional large pipe loops.

16

BASE TYPE A: Direct IsolationUsed when equipment is unitary and rigid and does not require additional support. Direct isolation can be used with large chillers, some fans, packaged air-handling units, and air-cooled condensers. If there is any doubt that the equipment can be supported directly on isolators, use structural bases (type B) or inertia bases (type C), or consult the equipment manufacturer.

BASE TYPE B: Structural Rails

KINETICS SFB Structural Frame BaseDescription: Welded structural frame bases with channels, angles, or WF beams, which are complete with outboard height-saving isolator brackets and prelocated equipment anchor bolts.

Application: Recommended for support and isolation of reciprocating chillers, close coupled pumps, vent sets, packaged air handling units, centrifugal fans, evaporative condensers, and similar types of equipment.

KINETICS SBB Structural Beam BaseDescription: Structural steel beam sections, with welded-on isolator support brackets, and pre-located and drilled anchor bolt holes for bolting to equipment to be supported.

Application: Recommended for support and isolation of absorption chillers, hermetic centrifugal chillers, package boilers, cooling towers, and similar types of equipment.

BASE TYPE C: Concrete Inertia Base

KINETICS CIB Concrete Inertia BaseDescription: A unique structural design which integrates perimeter channels, isolator support brackets, reinforcing rods, anchor bolts and concrete fill into a controlled load transfer system, utilizing steel in tension and concrete in compression, resulting in high strength and stiffness with minimum steel frame weight.

Application: Recommended for use with open-type centrifugal chillers, reciprocating air and refrigeration compressors, chillers, and heat pumps, close-coupled and base-mounted pumps, centrifugal fans, internal combustion engines, and similar types of equipment.

17

Installation Video

KINETICS KSRRoof Curb RailDescription: Noise and vibration control roof curb rail featuring horizontal and vertical seismic and wind restraints, multiple spring deflection options, custom taylored fit (compatible with most curb-mounted equipment), and continuous air- and water-tight seal.

Application: Recommended for support and isolation for unitary-packaged air-handling and refrigeration equipment, and exhaust fans, ordinarily mounted directly on non-isolated roof curb systems.

KINETICS KSCR and ESRVibration Isolation CurbsDescription: Complete assemblies designed to resiliently support equipment at the specified elevation and which constitute a fully enclosed air and weather-tight system.

Standard Features• Seismic and wind restraint • Up to 4" (102 mm) deflection, powder-coated steel

springs with 50% overload capacity• Supply and return flexible connector support • Environmentally inert elastomeric seal for an air and wa-

ter-tight closure between the curb and rail• High profile, non-interference aluminum rail (only KSCR)• Accessible ports for each isolator to inspect, level, or

change springs after equipment placement (only ESR)

Options• Deflections over 4" (102 mm)• Interface for sloped or multi-pitched roofs• Additional height for plenums & silencers• Exterior thermal insulation• Acoustical treatments• Certification of seismic and wind load engineering

Vibration from fans and compressors (source 1) and vibration from casing- radiated noise caused by duct turbulence and the airborne noise of the fans and compressors (source 2) are controlled with high deflection, laterally stable coil spring isolators and high frequency neoprene noise pads.

Duct-borne noise from the supply and return air fans (source 3) are controlled using an aerodynamic acoustical silencer on the supply fan and an acoustical plenum on the return air side both with minimal pressure drop.

Breakout noise through the bottom of the rooftop unit (source 4) is controlled by the NOISEBLOCK™ STL acoustical panel located in the floor of the ESSR.

KINETICS ESSRSound and Vibration Isolation CurbESSR is the only isolated curb system that addresses all four noise sources associated with packaged rooftop equip-ment. The ESSR incorporates all the features of our ESR vibration isolation curb with our aerodynamic acoustical silencers; return air plenums and NOISEBLOCK™ STL panels. This gives you a noise control system that addresses all the noise and vibration concerns of your packaged rooftop equipment: vibration from the rotating equipment and casing radiation, duct-borne noise from supply and return fans, and breakout noise from the fans and compressors into the space below.

18

BASE TYPE D: Curb-Mounted Base

Riser Supports, Anchors, and GuidesKINETICS® riser supports, anchors, and guides isolate the pipe from the structure to minimize noise and vibration transmission, while also allowing the pipe to expand and contract with minimal change in the support forces. Kinetics offers custom enginerring services to assist in the design of your riser system. Please see Kinetics Pipe Riser Selection Guide for details.

19

Non-Isolated Pipe Guide

Isolated Pipe Guide

Pipe Anchor

Spring Isolator

Isolation Hanger

Seismic Restraint

KINETICS QuakeLocTM

Seismic Cable Restraint KitsPiping, duct, electrical cable trays, and suspended equipment

• Reduces Installation Time and Cost• Contractor Friendly Design• IBC Code Compliant

AccessoriesKHRC Adjustable Angle Rod Stiffeners: Securely attach a length of steel angle to a conventional hanging threaded rod.

KSBC Seismic Beam Clamp: Attach seismic restraints to roof or floor support I-beams.

KINETICS HS SeriesSeismic SnubbersDescription: Heavy structural steel assemblies de-signed to minimize equipment motion within the prod-uct’s design capabilities without failing.

Seismic Snubbers are designed to be used in pairs and serve to keep supported equipment contained when the equipment is subjected to lateral or vertical forces along any axis.

Seismic Mounting BracketsKINETICS KSMS: Solid-mount equipment to the building structureKINETICS KSMG: Resiliently mount and restrain equipment to the building structureKINETICS KSMF: Solid-mount mushroom fans to the curb

Seismic restraint systems limit movement and keep equipment captive during a seismic event. Proper utilization of these systems can reduce the threat to life and minimize long-term costs due to equipment damage and associated loss of service. Additional seismic restraint products can be found within ASHRAE Type 4 (page 15) and Base Type D (page 18).

20

KINETICS QuakeStrutTM

Rigid Seismic BracingFM Approved Class 1950

QuakeStrut-1 is used when you are through bolting to strut and offers an economical rigid bracing options. QuakeStrut-2 is the full assembly with all of the hardware to connect to strut.

QuakeStrut-1 QuakeStrut-2

PIPING/HANGER SELECTION DATA (U.S.)

Piping Weight and Spacing - WaterPipe Size (in.)Pipe ScheduleMax. Spacing (ft.)Insulation (in.)*Wt. per Lin. Ft. (lb.) Pipe Water Insulation TotalWt. @ 10 ft. Spacing (lb.)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended. Rod Size (in.)**Wt. @ 20 ft. Spacing (lb.)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (in.)**Max. Spacing (ft.)Wt. @ Max. Spacing (lb.)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (in.)**

2420321.5

94.9184.0

10.7289.62896

3500-

30001.00

-

----

32-

----

2020301.5

78.8126.1

9.0213.92139

2200250022500.88

-

----

30-

----

1830281.5

82.299.8

8.2190.21902

2200200022500.88

-

----

28-

----

1630271.5

62.779.2

7.3149.21492

1700200016000.75

2984

3500-

30001.00

27-

----

1430251.5

54.759.8

6.5121.01210

1250120012500.752419

2465250025000.88

253024

3500-

35001.00

2.54011

1.0

5.82.11.1

9.090

125120100

0.38-

----

1199

125120100

0.38

240101.0

3.71.50.96.161

7070

1000.38

-

----

1061

7070

1000.38

1.540

91.0

2.70.90.84.4

-

-----

----

940

7070

-0.38

1.2540

71.0

2.30.60.73.6

-

-----

----7

26

3535

-0.38

140

71.0

1.70.40.62.7

-

-----

----7

19

3535

-0.25

840191.5

28.621.74.2

54.5545

6007205000.50

-

----

191036

1000120012500.62

64017

1.5

19.012.53.4

34.9349

3704655000.50

-

----

17594

600720750

0.50

540161.5

14.78.73.0

26.4264

3704652500.50

-

----

16421

5004655000.50

440141.0

10.85.51.5

17.8178

2452202500.50

-

----

14250

3704652500.50

340121.0

7.63.21.3

12.1121

125120100

0.38-

----

12145

2452202500.38

1240231.5

53.748.5

6.0108.21082

1250102510000.622163

2200250022500.88

232487

2865250025000.88

1040201.5

40.634.2

5.179.9799

8008507500.621598

1700200016000.75

201598

1700200016000.75

Piping Weight and Spacing - SteamPipe Size (in.)Pipe ScheduleInsulation (in.)*Wt. per Ft. (lbs.) Pipe Insulation TotalWt. @ 10 ft. Spacing (lb.)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (in.)**Wt. @ 20 ft. Spacing (lb.)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (in.)**Max. Spacing (ft.)Wt. @ Max. Spacing (lb.)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (in.)**

24202.0

94.9

14.5109.41094

1250120012500.622187

22002500

22501.00

394266

----

20202.0

78.8

12.391.1911

1000102510000.621822

22002000

22500.88

393552

----

18302.0

82.2

11.293.4934

1000102510000.621867

22002000

22500.88

373454

----

16302.0

62.7

10.172.8728

8007207500.6214561700

2000

16000.75

352548

286525002750

1.00

14302.0

54.7

8.963.6636

6257207500.6212731250

2000

16000.75

322036

220020002250

1.00

2.5401.55.8

1.87.676

7070

1000.38

---

--

14107

125120100

0.38

2401.53.7

1.65.353

7070

1000.38

---

--

1369

7070

1000.38

1.5401.52.7

1.44.141

3535

-0.38

---

--

1250

7070

-0.38

1.25401.52.3

1.33.636

3535

-0.38

---

--

1036

3535

-0.38

1401.51.7

1.22.9

-

-------

--

926

3535

-0.25

8402.0

28.6

5.934.6346

3704655000.50691625720

7500.62

24829

1000850

10000.62

6402.0

19.0

4.823.8238

2452202500.50477500720

5000.50

21501

5007205000.50

5402.014.7

4.218.9189

2452202500.50

---

--

19359

3704655000.50

4401.5

10.8

2.513.3133

125120100

0.38---

--

17227

2452202500.50

3401.57.6

2.19.797

125120100

0.38---

--

15145

245220100

0.38

12402.0

53.7

8.261.9619

6257207500.6212381250

2000

12500.75

301857

2200200022500.88

10402.0

40.6

7.147.7477

5007205000.50954

10001025

10000.62

261240

1250200012500.75

*Insulation weight based on industry standard insulation.**Rod size recommendation and max. hanger spacing based on MSS SP-69 Approximate Flanged Fitting Weights (lb.)

Pipe Size(In.)

11.52

2.53456810121416182024

BonnetCheckValve

--

263646801201553004506759001200137117723000

BonnetGateValve

9273750661091401702504706909501250165020003100

Elbow81218273356789716026039052072598013001850

Tee1118243540749111718229040060075093011001850

Flange4457915192332527093120140175250

21

PIPING/HANGER SELECTION DATA (SI)

Piping Weight and Spacing - WaterPipe Size (mm)Pipe ScheduleMax. Spacing (m)Insulation (mm)*Wt. per M (kg) Pipe Water Insulation TotalWt. @ 3 m Spacing (kg)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended. Rod Size (mm)**Wt. @ 6 m Spacing (kg)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (mm)**Max. Spacing (m)Wt. @ Max. Spacing (kg)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (mm)**

610209.838

141.3274.0

15.9431.21294

3500-

300025

-

----

9.8-

----

508209.138

117.3187.813.4

318.5955

220025002250

22-

----

9.1-

----

457308.538

122.4148.6

12.2283.2

850

220020002250

22-

----

8.5-

----

406308.238

93.3117.910.9

222.1666

170020001600

191332

3500-

3000258.2

-

----

356307.638

81.489.0

9.7180.1540

125012001250

191080

246525002500

227.6

1371.7

3500-

350025

64403.425

8.63.11.6

13.340

125120100

10-

----

3.444.9

125120100

10

51403.025

5.52.21.39.027

7070

10010

-

----

3.027.7

7070

10010

38402.725

4.01.31.26.5

-

-----

----

2.718.1

7070

-10

32402.125

3.40.91.05.3

-

-----

----

2.111.8

3535

-10

25402.125

2.50.60.94.0

-

-----

----

2.18.6

3535

-6

203405.838

42.632.3

6.281.1

243

600720500

13-

----

5.8469.9

100012001250

16

152405.238

28.318.6

5.152.0156

370465500

13-

----

5.2269.4

600720750

13

127404.938

21.912.94.5

39.3118

370465250

13-

----

4.9190.9

500465500

13

102404.325

16.18.22.2

26.580

245220250

13-

----

4.3113.4

370465250

13

76403.725

11.34.81.9

18.054

125120100

10-

----

3.765.8

245220250

10

305407.038

80.072.19.0

161.1483

125010251000

16966

220025002250

227.0

1128.1

286525002500

22

254406.138

60.550.9

7.6119.0357

800850750

16714

170020001600

196.1

724.8

170020001600

19

Piping Weight and Spacing - SteamPipe Size (mm)Pipe ScheduleInsulation (mm)*Wt. per m (kg) Pipe Insulation TotalWt. @ 3 m Spacing (kg)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (mm)**Wt. @ 6 m Spacing (kg)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (mm)**Max. Spacing (m)Wt. @ Max. Spacing (kg)KNC Hanger Model No. SH/SRH/SFH -1 SH/SRH/SFH -2 SH/SRH/SFH -4Recommended Rod Size (mm)*

6102051

141.321.6

162.9489

125012001250

16978

220025002250

2511.9

1935

----

5082051

117.318.3

135.6407

100010251000

16814

220020002250

2211.91611

----

4573051

122.416.7

139.1417

100010251000

16834

220020002250

2211.3

1567

----

4063051

93.415.0

108.4325

800720750

16650

170020001600

1910.7

1156

286525002750

25

3563051

81.413.394.7284

625720750

16568

125020001600

199.8

924

220020002250

25

644038

8.62.711.334

7070

10010

-

----

4.349

125120100

10

514038

5.52.47.924

7070

10010

-

----

4.031

7070

10010

384038

4.02.16.118

3535

-10

-

----

3.723

7070

-10

324038

3.41.95.316

3535

-10

-

----

3.016

3535

-10

254038

2.51.84.3

-

-----

----

2.712

3535

-6

2034051

42.68.8

51.4154

370465500

13308

625720750

167.3

376

1000850

100016

1524051

28.37.1

35.4106

245220250

13212

500720500

136.4

227

500720500

13

1274051

21.96.228.1

84

245220250

13-

----

5.8163

370465500

13

1024038

16.13.7

19.859

125120100

10-

----

5.2103

245220250

13

764038

11.33.1

14.443

125120100

10-

----

4.666

245220100

10

3054051

80.012.292.2277

625720750

16554

125020001250

199.1

842

220020002250

22

2544051

60.510.571.0213

500720500

13426

100010251000

168.0

562

125020001250

19

*Insulation weight based on industry standard insulation.**Rod size recommendation and max. hanger spacing based on MSS SP-69 Approximate Flanged Fitting Weights (kg)

Pipe Size(mm)2538516476102127152203254305356406457508610

BonnetCheckValve

--

11.816.320.136.354.470.3136.1204.1306.2408.2544.3621.9803.81360.8

BonnetGateValve

4.112.216.822.730.049.463.577.1

113.4213.2313.0430.9567.0748.4907.21406.1

Elbow3.65.48.212.215.025.435.444.072.6117.9176.9235.9328.9444.5589.7839.1

Tee5.08.210.115.918.133.641.353.182.6131.5181.4272.2340.2421.8499.0839.1

Flange1.81.82.33.24.16.88.610.414.523.631.842.254.463.579.4113.4

22

Isolation Notes for Specific Equipment*Kinetics Noise Control strongly recommends 2015 ASHRAE Hand-book, Chapter 48 Noise and Vibration Control as a companion to this product selection guide.

Refrigeration MachinesLarge centrifugal, screw, and reciprocating refrigeration machines may generate very high noise levels; special attention is required when such equipment is installed in upper-story loca-tions or near noise-sensitive areas. If equipment is located near extremely noise-sensitive areas, follow the recommendations of an acoustical consultant.

CompressorsThe two basic reciprocating compressors are duct structures. (1) single- and double-cylinder vertical, horizontal or L-head, which are usually air compressors; and (2) Y, W, and multi-head or multi-cylin-der air and refrigeration compressors. Single- and double-cylinder compressors generate high vibratory forces requiring large inertia bases (type C) and are generally not suitable for upper-Story loca-tions. If this equipment must be installed in an upper-story location or at-grade location near noise-sensitive areas, the expected max-imum unbalanced force data must be obtained from the equipment manufacturer and a vibration specialist consulted for design of the isolation system.

When using Y, W, and multi-head and multi-cylinder compressors, obtain the magnitude of unbalanced forces from the equipment manufacturer so the need for an inertia base can be evaluated.

Base-mounted compressors through 5 hp and horizontal tank-type air compressors through 10 hp can be installed directly on spring isolators (type 3) with structural bases (type B) if required, and compressors 15 to 100 hp on spring isolators (type 3) with in-ertia bases (type C) with a mass I to 2 times the compressor mass.

PumpsConcrete inertia bases (type C) are preferred for all flexible- coupled pumps and are desirable for most close-coupled pumps, although steel bases (type B) can be used. Close-coupled pumps should not be installed directly on individual isolators (type A) because the impeller usually overhangs the motor support base, causing the rear mounting to be in tension. The primary require-ments for type C bases are strength and shape to accommodate base elbow supports. Mass is not usually a factor, except for pumps over 75 hp, where extra mass helps limit excess movement due to starting torque and forces. Concrete bases (type C) should be designed for a thickness of one-tenth the longest dimension with minimum thickness as follows: (1) for up to 30 hp, 6 in; (2) for 40 to 75 hp, 8 in; and (3) for 100 hp and up, 12 in.

Pumps over 75 hp and multistage pumps may exhibit excessive motion at start-up (“heaving”); supplemental restraining devices can be installed if necessary. Pumps over 125 hp may generate high starting forces; a vibration specialist should be consulted.

Cooling TowersThese are normally isolated with restrained spring isolators (type 4) directly under the tower or tower dunnage. High deflection isolators proposed for use directly under the motor-fan assembly must be used with extreme caution to ensure stability and safety

under all weather conditions.

Packaged Rooftop Air-Conditioning EquipmentThis equipment is usually installed on lightweight structures that are susceptible to sound and vibration transmission problems. The noise problems are compounded further by curb-mounted equipment, which requires large roof openings for supply and return air.

Type D vibration isolators are shown for all spans up top 20 ft, but extreme care must be taken for equipment located on spans of over 20 ft, especially if construction is open web joists or thin, light-weight slabs. The recommended procedure is to determine the additional deflection caused by equipment in the roof. If additional roof deflection is 0.25 in. or less, the isolator should be selected for 10 times the additional roof deflection. If additional roof deflection is over 0.25 in, supplemental roof stiffening should be installed to bring the roof deflection down below 0.25 in, or the unit should be relocated to a stiffer roof position.

For mechanical units capable of generating high noise levels, mount the unit on a platform above the roof deck to provide an air gap (buffer zone) and locate the unit away from the associated roof penetration to allow acoustical treatment of ducts before they enter the building.

Some rooftop equipment has compressors, fans, and other equipment isolated internally. This isolation is not always reliable because of internal short-circuiting, inadequate static deflection, or panel resonances. It is recommended that rooftop equipment over 300 lb be isolated externally, as if internal isolation was not used.

Fans and Air-Handling EquipmentConsider the following in selecting isolation systems for fans and air-handling equipment:

1. Fans with wheel diameters of 22 in. and less and all fans operating at speeds up to 300 rpm do not generate large vibra-tory forces. For fans operating under 300 rpm, select isolator deflection so the isolator natural frequency is 40% or less than the fan speed. For example, for a fan operating at 275 rpm, 0.4 x 275 = 110 rpm. Therefore, an isolator natural frequency of 110 rpm or lower is required. This can be accomplished with a 3 in. deflection isolator (type 3).

2. Flexible duct connectors should be installed at the intake and discharge of all fans and air-handling equipment to reduce vibration transmission to air duct structures.

3. Inertia bases (type C) are recommended for all class 2 and 3 fans and air-handling equipment because extra mass allows the use of stiffer springs, which limit heaving movements.

4. Thrust restraints (type 5) that incorporate the same deflection as isolators should be used for all fan heads, all suspended fans, and all base-mounted and suspended air-handling equip-ment operating at 2 in. or more total static pressure. Restraint movement adjustment must be made under normal operational static pressures.

*Reprinted with permission from 2015 ASHRAE Handbook.

VIB ISO │ 05/18Kinetics Noise Control, Inc. is continually upgrading the quality of our products. We reserve the right to make changes to this and all products without notice.

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