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Profile ZQP is a double-acting piston/cylinder seal. It is a further development of the type ZCP. 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. As a result, a good lubricating film is maintained between the seal and the cylinder wall, even after extended downtimes 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 lateral polyacetate-based angular support ring each, which, as semi-active support rings, allow even higher pressurisation, but only provide limited guidance of the piston. Set code SN250/SN270 = support ring slotted, set code = SN254/SN274 endless support ring
Can be used in mineral oil, HFA, HFC and HFB fluids
Standard materials:
To avoid damaging the seal, it must not be pulled over sharp edges. The profile ZQP with the set number SN250/SN270 can be mounted on one-piece pistons from a diameter of 60 mm, below that we recommend a split groove design. With kit number SN254/SN274, 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, especially telescopic rams with bottom valves
Do you need support in selecting the right seal or do you have any questions? We will be happy to help you directly!