Type GRB
Belt Roll Bellows
A rolling rubber bellow is positioned between a load plate on top and the piston below. The rolling rubber is made of a high quality elastomer with vulcanized reinforced steel belts. Cover plate and piston are made from cast aluminum. The sealing surfaces are machined. All other surfaces are blasted. Due to this concept very low vertical and lateral stiffness is realized in order to get much more lower natural frequencies in comparison to other air types.
This air spring is nearly perfectly designed to be used in a wide scope of application, especially for high dynamically operated machines and test bench systems or really rough environment conditions.
Application
passive vibration isolation:
- metrological instruments
- electron microscopes
- measuring buildups
- high requirement for the degree of isolation
- laser technology equipment
- measurement setups
active vibration isolation:
- suspension of large seismic masses (>20t)
- high dynamic application
Offered Sizes
*The natural frequency of model VD slightly varies from the standard value. Please contact us for detailed specifications.
| Type | Operating Pressure [bar] | Load Capacity [kN] | Vertikal Natural Frequency (dyn.) [Hz] |
|---|---|---|---|
| GRB 780 /-MD /-VD* GRB 780 /-MD /-VD* GRB 780 /-MD /-VD* | 4 6 8 | 52 78 104 | 1,7 1,6 1,5 |
| GRB 1240 /-MD /VD* GRB 1240 /-MD /VD* GRB 1240 /-MD /VD* | 4 6 8 | 83 124 165 | 1,5 1,4 1,3 |
| GRB 1820 /MD /VD* GRB 1820 /MD /VD* GRB 1820 /MD /VD* | 4 6 8 | 122 184 244 | 1,4 1,3 1,3 |
| GRB 2480 /MD /VD* GRB 2480 /MD /VD* GRB 2480 /MD /VD* | 4 6 8 | 165 248 329 | 1,5 1,4 1,4 |
| GRB 2480-1200 ZV /AV GRB 2480-1200 ZV /AV GRB 2480-1200 ZV /AV | 4 6 8 | 165 248 329 | 0,85 0,80 0,75 |
| GRB 2480-840 GRB 2480-840 GRB 2480-840 | 4 6 8 | 165 248 329 | 1,05 1,00 0,95 |