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Profile ZDP is a double-acting piston/cylinder seal. It consists of an elastomer body made of NBR in the centre. A fabric with a special NBR/SFR compound is laminated into the running surface. This ensures that a good lubricating film is maintained between the seal and the cylinder wall, even after long periods of standstill under high pressure. This lubrication deposit reduces the breakaway force and considerably improves the service life of the seal. To prevent gap extrusion, the profile is additionally reinforced on the outer diameter with one polyacetate-based angular support ring on each side, which also provides guidance for the piston.Set code SN250 = support ring slotted, Set code = SN254 endless support ring
Can be used in mineral oil, HFA, HFC and HFB fluids
Standard materials:
To avoid damage to the seal, it must not be pulled over sharp edges. The profile ZDP with the set number SN250 can be mounted on one-piece pistons from a diameter of 60 mm, below that we recommend a split groove design. For set number SN254, a split groove design is generally necessary. For special applications (high temperature, speed, specific pressure load or use in HFA, HFB fluids etc.) please contact our application engineering department.
For use in HFA, HFC and HFB fluids, please note the temperature limits of -5°C and +60°C.
Hydraulic pit cylinders and tunnel boring machines
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