Vibration Control Products V.a Open Spring Mounts Type OM Type OM are free standing, open coil mounts. The spring is positioned between a steel bottom load plate, bonded to a neo- prene noise stop pad, and a steel top load plate. The spring is held in with two drilled and tapped steel restraints. The supported Dimensional Data mm Load Range Kg Nom Defl mm Type A B C D E F G OM/1A/25 20 70 92 80 30 0 4 -500 25 OM/1/25 65 87 20 90 88 2 4 97-09 25 OM/1/50 85 87 20 90 220 2 4 22-907 50 OM/1/75 70 05 42 30 245 2 4 22-907 75 OM/1/100 260 205 225 200 350 2 4 45-36 00 equipment is held between a levelling nut and retaining screw. The mounts may be fixed down utilising the pre-drilled holes in the base plate. Alternatively, the neoprene pad will act as a friction pad. Open Spring Type OM Retaining screw F dia Levelling nut Top load plate Spring pressure plate Lower spring restraint Bottom load plate Ribbed neoprene pad Client equipment Maximum unloaded height E G mm Dia holes for holding down bolts B C A D
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Open Spring MountsType OMType OM are free standing, open coil mounts. The spring is positioned between a steel bottom load plate, bonded to a neo-prene noise stop pad, and a steel top load plate. The spring is held in with two drilled and tapped steel restraints. The supported
Dimensional Datamm
Load Range
Kg
Nom Deflmm
Type A B C D E F GOM/1A/25 �20 70 92 80 �30 �0 �4 ��-500 25
OM/1/25 �65 87 �20 90 �88 �2 �4 97-�09� 25
OM/1/50 �85 87 �20 90 220 �2 �4 22-907 50
OM/1/75 �70 �05 �42 �30 245 �2 �4 22-907 75
OM/1/100 260 205 225 200 350 �2 �4 45-�36� �00
equipment is held between a levelling nut and retaining screw. The mounts may be fixed down utilising the pre-drilled holes in the base plate. Alternatively, the neoprene pad will act as a friction pad.
Open Spring Type OM
Retaining screw F dia
Levelling nut
Top load plate
Spring pressure plate
Lower spring restraint
Bottom load plate
Ribbed neoprene pad
Client equipment
Max
imum
unl
oade
d he
ight
E
G mm Dia holes forholding down bolts
BC
A
D
V.�b
Restrained Spring Mounts With External Levelling Type RMEType RME are free standing restrained mounts with external levelling. The springs are positioned between a steel bottom load plate, bonded to a neoprene stop pad and a steel top load plate. The spring is held in with two drilled and tapped steel restraints.
The supported equipment is held between the top load plate and a lock nut. The mounts may be fixed down utilising the pre-drilled holes in the base plate. Alternatively, the neoprene pad will act as a friction pad.
Single SpringType RME/1A/25 & RM/1/25
Double SpringType RME/2/25
Dimensional Data mm
Load Range
Kg
Nom Deflmm
J
Type A B C D E F G HRME/1A/25 �65 �90 230 90 60 �4 �2 �40 ��-500 25 -
Restrained Spring Mounts With Internal Levelling Type RMIType RMI are free standing restrained mounts with internal levelling. The springs are positioned between a steel bottom load plate, bonded to a neoprene stop pad, and a steel top load plate. The spring is held in with two drilled and tapped steel restraints.
The supported equipment is positioned on the top load plate. Mounting holes can be pre-drilled in the top plate if requested. The mounts may be fixed down utilising the pre-drilled holes in the base plate. Alternatively, the neoprene pad will act as a friction pad.
Dimensional Data mm Load Range
KgNom Defl
mmType A B C D F G J
RMI/1A/25 �65 �90 230 90 �4 �45 - ��-500 25
RMI/1/25 �90 220 250 90 �4 �95 - 97-�09� 25
RMI/2/25 330 370 4�0 �30 �4 205 70 �93-2�82 25
RMI/1/50 �90 220 250 90 �4 230 - 22-907 50
RMI/1/75 2�0 240 280 �30 �4 260 - 22-907 75
RMI/1/100 330 358 408 200 �4 425 - 45-�36� �00
Dia Fixing Holes
4 Off M�0 Equipment Mounting Holes
A
B
C
D
F
ABC
D E
Single Spring Type RMI/1A/25 & RM/1/25
Double SpringType RMI/2/25
Levelling Bolt
Rubber Isolation Bush
Baseplate with Sound Insulating
Max
imum
Fre
e H
eigh
tH H
Max
imum
Fre
e
Levelling Bolt
Rubber Isolation Bush
Baseplate with sound insulating pad
V.�d
Type NH neoprene hangers comprise a rubber-in-shear mount located in a steel housing. The mount is moulded from high grade synthetic rubber with added anti-ozone and anti-oxidant agents. A threaded insert is embedded in the top of the rubber. A load plate (suf-fix ‘L’) may be fitted into the steel housing to hold the suspended load to a fixed position during installation.
Dimensional Data mmWeight
Range KgNominal De-
flectionmmMount Type A B C D E
NH/1 80 70 70 8 �2 9-72 4
NH/2 �00 90 90 �2 �4 �8-360 5
NH/3 80 70 70 8 �2 9-72 9
NH/4 �00 90 90 �2 �4 �8-360 �0
Neoprene HangersType NH
Neoprene HangerType NH
Type NH
Drop rod byothers
D Tapped mount for for clients drop rodDrop rod by others
CA
B
E Hole in steel housing
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Type SH spring hangers comprise steel springs mounted in a steel housing. The springs are retained between steel top and bottom load plates. Type SH requires the lower hanger rod to pass through the spring with the rod held on top of the spring with a nut and washer. Type SHA is supplied with a drop rod passing through the spring fixed to the top of the spring with a nut. A tapped adaptor is supplied to fit in a drop rod by others.
Spring HangersType SH/SHA
Dimensional Data mm Weight Range
Kg
Nominal Deflec-
tionmm
Mount Type A B C D E
SHA/1/25/1 �00 50 50 �0 �2 7-�37 �5
SHA/1/25/2 �50 �00 80 �2 �2 ��-228 25
SHA/1/25/3 200 �00 �00 �2 �2 34-637 25
SH/1/25/1 �50 �00 80 - �4 ��-500 25
SH/1/25/2 250 �50 �00 - �4 97-�09� 25
SH/1/50/1 250 �50 80 �2 �8 ��-454 50
SH/1/50/2 350 �50 �00 �6 �8 45-909 50
SH/1/75/1 250 �50 80 �2 �8 ��-454 75
SH/1/75/2 350 �50 �00 �6 �8 455-909 75
SH/1/100/1 370 2�0 �80 �2 �4 ��-299 �00
SH/1/100/2 400 235 250 �6 20 300-600 �00
SH/1/100/3 485 260 300 �6 20 60�-�600 �00
A load plate (suffix ‘L’) may be fitted to all hangers to hold the suspended load to a fixed position during installation.
Lock nut “B” (M24)
Lock nut “A” (M24)
Type SHA
12mm max. Hanger rod nut and washer by others
Drop rod supplied with hanger
Tapped adaptor for clients hanger rod
D Dia drop rod by others
E Hole size B x C
A
Type SH
Lower hanger rod,nut and washer by others
Upper hanger rod,nut and washer by
E Hole size
A
B x C
D DIA
V.�f
Type SNH spring hangers comprise steel springs mounted in a steel housing with a neoprene insert located in the top of the mount. The springs are re-tained between steel top and bottom load plates. The hanger rods, by others, are passed through the spring and neoprene components and held with a nut and washer.
Spring & Neoprene Hangers Type SNH
A load plate (suffix ‘L’) may be fitted to all hangers to hold the suspended load to a fixed position during installation.
Type SNH
Dimensional Data mm Weight RangeKg
Nominal Deflection
mmMount Type A B C D ESNH/1/25/1 �50 �00 80 - �4 ��-��00 25
SNH/1/25/2 250 �50 �00 - �4 425-2400 25
SNH/1/50/1 250 �50 �00 �2 �8 ��-454 50
SNH/1/50/2 350 �50 �00 �6 �8 455-909 50
SNH/1/75/1 250 �50 �00 �2 �8 ��-454 75
SNH/1/75/2 350 �50 �00 �6 �8 455-909 75
SNH/1/100/1 370 2�0 �80 �2 �4 ��-299 �00
SNH/1/100/2 400 235 250 �6 20 300-600 �00
SNH/1/100/3 485 260 300 �6 20 60�-�600 �00
Dimensional Data
Type A B C DHOS/0 �50 �00 80 M�2 Exceptionally M16
HOS/1 250 �50 �00 M�6 Exceptionally M20
Lock nut “B” (M24)
Lock nut “A” (M24)
Lower hanger rod, nut and washer by others
Upper hanger rod, nut and washer by others
B x CE hole size
A
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Type NM are neoprene-in-shear mounts moulded from high grade synthetic neoprene with added anti-ozone and anti-oxidant agents. A threaded insert is embedded in the top of the mount and a pre-drilled steel load plate in the bottom of the mount.
Neoprene isolation pads are normally supplied ribbed in standard sizes of 465x465mm. The pads are re-sistant to ozone, fuel oil, cutting fluid etc. Other elas-tomers are available.
Pads can be supplied cut to smaller sizes. The thick-ness can be increased by bonding layers together. Type NP2 pads can be made up of two layers of NP� bonded to both sides of a galvanised plate
Type NP1
Type NP2
Rubber Isolation PadsType NP
Product Code Weight Range Kg
Nominal Deflection
mmNP� 2.0 - 12.0 kg/cm2 2.0
NP2 2.0 - 12.0 kg/cm2 4.0
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Type CMA
Dimensional Data mm Weight Range
Kg
Nominal Deflection
mmType A B C D E F G H
CMA 64 83 �02 64 - 59 3� �0 7-2�0 �5
CMB 99 ��0 �30 62 - �02 �65 �� ��-364 25
CMC �24 �48 �73 73 - �30 �90 �4 34-864 25
CMD �96 2�0 242 �4� 65 �65 235 20 340-259� 25
Captive Mounts Type CM
Type CMB & CMC
Type CM mounts are enclosed spring mounts, comprising of plated springs se-cured in a neoprene sealed housing. Type CMA has a zinc plated top cap and a neo-prene bottom plate. Types CMB, CMC and CMD have a die cast alloy housing with an epoxy powder paint finish.
The top cap is separated from the bottom housing with neoprene snubbers. Caution should be taken to ensure the mounts are installed upright, with lateral forces mini-mised, so that contact between the top and bottom housings is not enough to de-generate the performance of the housed springs.
Lock nutH Levelling bolt
E F
ree
heig
ht
F
CBA
D
G Dia fixing holes
Tapped centre fixing H Type CMD
Lift nut
F A
ppro
x
E F
ree
Hei
ght
H Levelling bolt
G Dia fixing
D
ABC
H Levelling bolt
Lock nut
F
E F
ree
Hei
ght
G Dia fixing holes
ABC
D J
V.��
An inertia base is normally required when vibrating plant is required to be isolated with high deflection mounts, typically above 10mm deflection. If plant, such as a pump, is placed on springs without a frame base, it will be unstable.
An inertia base is a frame base into which concrete is poured, which increases the mass of the base, conse-quently damping down the inertial forces of the plant. The increased mass of the concrete in the base also lowers the centre of gravity of the combined structure, decreasing the base dimensions required to achieve stability. The height of the frame of the base must be at least of the longest dimension between sup-porting mounts.
Type TIB Inertia bases comprise a frame section manufactured from folded steel sheet typically mm thick. Mounting plates are manufactured from �0mm thick plate. Reinforcing bars are fitted into the bases. The base would normally be finished with grey or red primer - other finishes can be applied as required. Concrete would be supplied and poured into the bas-es by others.
The base should be placed on a fixed former prior to pouring. Following curing of the concrete, the base should be lifted and the mounts fitted. Height adjust-ment and levelling of the base can be achieved by adjusting the fixed nut on the mounts, maintaining a minimum dimension of 25mm between the bottom of the base and the supporting structure. We would recommend that the base is temporarily fixed solid by chocks between the bottom of the base and the sup-porting structure prior to installation of equipment on the base. Following fitting of the supported equipment the chocks should be removed and the base levelled. The bases may be fitted with open springs, restrained springs or neoprene mounts.
Inertia BasesType TIB
Dimension & Weight Table150mm High Base 200mm High Base 300mm High BaseWidthmm
The above sizes are typical but we can manufacture to any size required. Please note a clearance of at least �50mm should be allowed around the base to allow ad�ustment of the levelling nuts.
Concrete Grade 25
(By Others)
Optional depending on base size
Length
Wid
th
Fixed nut height adjuster
Height25 min
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Vibration Limitation Guide
Vibration Limitation Guide
EquipmentFloor Span
Solid Floor Up To 6 Metres Up To 12 Metres
Isolator Type
Minimum Deflection
Inertia Base
Isolator Type
Minimum Deflection
Inertia Base
Isolator Type
Minimum Deflection
Inertia Base
PumpsUp To 5KW NM �0 No NM �0 No OM 25 Yes
Over 5KW OM 25 Yes OM 25 Yes OM 50 Yes
FansUnder 3KW NM/NH �0 No OM/SH 25 No OM/SH 25 No
Under 20KW Over OM 25 No OM 25 No RM 50 No
500-300rpm OM 25 No RM 50 No RM �00 No
Under 300rpm OM 25 No RM 75 No RM �00 No
Over 20KW Over OM 25 No OM 25 No OM 75 Yes
500-300rpm OM 25 No RM 50 No RM �00 Yes
Under 300rpm OM 25 No RM 75 No RM �25 Yes
Refrigeration Reciprocating
ChillersRM 25 No RM 50 No RM 75 Yes
Centrifugal Chill-ers
NM �0 No RM 25 No RM 50 Yes
Absorbtion Ma-chines
NM �0 No RM 25 No RM 50 No
Screw Compres-sors
RM with NP2
25 No RM with NP2
25 No RM with NP2
50 No
Refrigeration & Air Compressors
OM 25 No RM 50 Yes OM 75 Yes
Air Cooled CondensorsUnder 500rpm NM �0 No NM �0 No RM 75 No
Over 500rpm NM �0 No NM �0 No RM 50 No
Cooling TowersUnder �500KW NP/NM 5 No RM 25 No RM 50 No
Over �500KW NP/NM �0 No RM 50 No RM �25 No
Engine Driven Under 20KW NM �0 No OM 25 Yes OM 75 Yes
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