
	Anti Vibration Mounts

OS

Open Spring Mountings - Special Range Sizes OS25, OS50, OS75 and OS100

For Building Services Applications

Home ››
Mounts ››
Product Range ››

Home

Product Range

Spring Mountings
and Hangers

Rubber
Mountings
and Hangers

Combined Spring
and Rubber
Mountings

Mats, Pads
and Frames

Marine, Offshore
and Shock
Products

Building Services
Products

Industrial and
Rubber Products

Acoustic
Building Products

Contact Our
Head Office

Contact Our
USA Office

Customer
Feedback

About Us

Quality

Downloads

Catalogue
Request

Originally designed for use with Type IPF Inertia Pouring Frames, the OS Mountings are now widely used to isolate vibration from every conceivable type of rotating and reciprocating machine. Where control of transient motion is required Open Spring Mountings can be used in conjunction with our Viscous Dampers Type SFD.

For applications requiring bolting down the rubber seating pad and grommets ensure that there is no direct metal path between the machine and the seating, thus enhancing the high frequency noise isolation.

Design Features:

Nominal 25, 50, 75 and 100 mm deflection colour coded helical steel springs to BS1726 Class B with 50% overload capacity and O/D equal to at least 85% of working height.
Can be bolted to supporting structure or free standing on 6 mm thick ribbed rubber seating pad (fitted as standard).
Fully height adjustable.
Zinc plated metals.
No snubbing gives maximum efficiency.

Typical Applications:

Axial and Centrifugal Fans.
Air Handling Units.
Low level pipework.
With Inertia bases type IPF for pumps, generating sets and compressors etc.

Application Notes:

Isolation Efficiency at Typical Machine Speeds:

MACHINE SPEEDS (rpm)	EFFICIENCY %
MACHINE SPEEDS (rpm)	25 mm DEFL.	50 mm DEFL.	75 mm DEFL.	100 mm DEFL.
300	34.0	75.2	84.7	89.0
500	83.3	92.3	95.0	96.3
750	93.2	96.7	97.8	98.4
1000	96.3	98.2	98.8	99.1
1200	97.4	98.7	99.2	99.4
1500	98.4	99.2	99.5	99.6
1750	98.8	99.4	99.6	99.7
2000	99.1	99.5	99.7	99.8

The above figures are theoretical values only based on the vertical natural frequency of the sprung system assuming infinitely stiff structural supports.

The effects of high frequency spring coil resonances on low frequency performance are also ignored.