This unique range of open spring mounting uses an integral rubber and fixing of the spring which sets them apart from all other designs. Loose spring and plats are now history and high frequency and noise attenuation is provided regardless of whether rubber seating pad is used or not.
Originally designed for use with type IPF inertia pouring frames the mountings are now widely used to isolate vibration from every conceivable type of rotating and reciprocating machine. Some examples being air handing units axial and centrifugal fans, low level pipe work. Ductwork condensing units, pumps generating sets, chillers, etc. where control of transient motion is required open spring mountings can be used in conjunction with our viscous dampers type.
Design Features:
| Size | Load range (kg) | Nominal Deflection (mm) |
|---|---|---|
| SMI-OSM-25 | 30-2300 | 25 |
| SMI-OSM-50 | 100-1300 |
Isolation Efficiency at Typical Machine Speeds:
| M/C Speed (rpm) | Efficiency % | ||
|---|---|---|---|
| 15 mm DEFL | 25 mm DEFL | 50 mm DEFL | |
| 300 | Do not use | 34.0 | 75.2 |
| 500 | 68.7 | 83.3 | 92.3 |
| 150 | 88.1 | 93.2 | 96.7 |
| 1000 | 93.7 | 96.3 | 98.2 |
| 1200 | 95.5 | 97.4 | 98.7 |
| 1500 | 97.3 | 98.4 | 99.2 |
| 1750 | 98.0 | 99.8 | 99.4 |
| 2000 | 98.5 | 99.1 | 99.5 |
Note - These above figures are theoretical values only based on the vertical natural frequency of the spring system assuming in infinity stiff structural supports. The effects of high frequency spring coil resonances on low frequency performance are also ignored.
