C-Type / Hydraulic Industrial Shock Absorber

Hydraulic Buffer / COMPENSER®

With the C-Type, LEBEN provides a (gas) hydraulic industrial shock absorber (hydraulic buffer) for applications in light to medium mechanical industry.

Hydraulic Industrial Shock Absorber

The hydraulic industrial shock absorber of the C-series (COMPENSER®) is the ideal hydraulic buffer for storage and retrieval machines or smaller conveyor systems, crane systems, test stands etc. in light to medium mechanical engineering.

Due to its short design, this hydraulic buffer (COMPENSER®) can be used in a space-saving manner as limitation of the end position (as emergency end stop) in industrial applications. In addition, the low reset force allow operational push-in cycles at creep speed. A wide range of additional equipment is available for this hydraulic industrial shock absorber. Maintenance and simple repairs can be carried out on-site by the customer’s own staff due to the modular design of this damper.


  • installation position: horizontal mounting (standard), vertical mounting on request
  • low reset force
  • short design length
  • high buckling safety
  • surface: housing galvanized (standard) or painted, piston rod hard chromium plated (standard)
  • low-viscosity COMPENSOL®
  • flange optionally on front or back, or foot mounting
  • 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 600 kNm

The piston rod 2 enters the metering tube 3. The damping medium flows from the pressure chamber 6 through the throttle orifices 4 of the metering tube 3 into the volume balance chamber 5. The nitrogen gas between the outer tube 7 and the metering tube 3 is compressed and stores the energy required for the reset of the piston rod. When the piston rod 2 returns to the initial position, the damping medium flows back into the pressure chamber 6.

1 Impact cap 2 Piston rod 3 Metering tube 4 Throttle orifices
5 Volume balance chamber 6 Pressure chamber 7 Outer tube 8 Rear flange


Hydraulic Industrial Buffer


  • Auxiliary accumulator for reducing the resetting force and separating the damping medium phase from the nitrogen gas phase, e.g. in operational load cycles
  • Sensor for signalling the operational readiness of the shock reducing element (inductive, magnetic, optical or as a mechanical limit switch – also available explosion-proof according to ATEX)
  • Integrated monitoring of filling levels
  • Pressure sensor (diaphragm or piston pressure switch) for monitoring the internal pressure
  • Sensor for position monitoring of the stroke
  • Integrated temperature monitoring
  • 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
  • Protective bellow as the best possible protection against dust, dirt or corrosive media
  • Maintenance-free mechanical reset of the piston rod by means of a compression spring
  • Safe usage in automotive & food industry by appropriate COMPENSOL®
  • SpecialCOMPENSOL® for use in extreme temperature ranges
  • Valve to minimize the reset time
  • Valve for minimizing the push-in force during operational load activity
  • 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
  • PU impact cap for noise reduction
  • 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
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