Industrial Shock Absorber / COMPENSER®

With the S-Type, LEBEN provides a hydraulic industrial buffer (shock absorber) for applications in mostly heavy mechanical engineering.

Hydraulic Buffer

The preferred field of application for the (gas) hydraulic industrial shock absorber (COMPENSER®) of the S-series is in the medium and heavy engineering sector. As a heavy duty shock absorber it is used in large crane systems (e.g. harbour crane, shipyard crane or container crane), metallurgical plants, rolling mills, loading systems or as end stop integrated in a rail buffer stop. Maintenance and simple repairs can be carried out by the customer’s own personnel on site due to the modular design of this buffer.


  • installation position: any
  • short design length
  • very high buckling safety
  • robust guidance and bearing
  • high resetting force
  • surface: housing painted in RAL 1023 (standard), piston rod double hard chromium plated (standard)
  • low-viscosity COMPENSOL®
  • flange optionally at front or rear
  • optionally constant reaction force over the entire stroke or increasing reaction force in the beginning stroke range
  • very short activation time after impact
  • temperature range -40 to +80 ° C
  • energy absorption up to 3.450 kNm

Industrial Shock Absorber BufferThe gas-filled inner tube 2 enters the cylinder. The damping medium flows from the pressure chamber 6 through the throttle orifices 8 of the metering tube 7 into the volume balance chamber 5. The separating piston 4 simultaneously moves in the direction of the impact cap 1 and compresses the nitrogen gas filling. In the gas space 3, the energy is stored which is required for the reset of the inner tube. When the inner tube 2 returns to the initial position, the separating piston 4 moves in the opposite direction and presses the damping medium back into the pressure chamber 6.

Heavy Duty Shock Absorber

  • Tube-in-tube construction
  • Auxiliary accumulator for reducing the resetting force, e.g. in operational load cycles
  • Sensor for signalling the operational readiness of the shock reducing element (inductive, magnetic and explosion-proof according to ATEX)
  • Integrated monitoring of filling levels
  • Maintenance connection for filling damping medium and nitrogen gas
  • Specific materials, e.g. stainless steel for a highly corrosive environment or use in the food industry
  • High-quality corrosion protection according to DIN EN ISO 12944 up to corrosion class C5M
  • Housing: painted (e.g. seawater resistant or zinc-free) or nickel-plated. / Piston rod: bronze hard chrome coating
  • Protective bellow as the best possible protection against dust, dirt or corrosive media
  • Leakage-free usage by highly viscous COMPENSOL®
  • Safe usage in automotive & food industry by appropriate COMPENSOL®
  • SpecialCOMPENSOL® for use in extreme temperature ranges
  • Valve to minimize the reset time
  • Drive energy absorption (throttling)
  • End position damping
  • Optional round or square flange on front or rear position
  • Foot mounting (welded or flanged)
  • Special mounting (e.g. eyes) according to the desired geometry of the customer
  • Special impact cap on customer request and for special applications (catching impact cap in case of two colliding impact caps)
  • Safety rope attached to the piston rod
  • Special seals for use in extreme temperature ranges