Parker Prädifa Piston Sealing Set ZK

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The Parker Prädifa piston sealing set profile ZK consists of a one-part rubber-fabric sealing ring provided with a back-up ring to prevent extrusion. The dynamic surface of the seal is reinforced with a special fabric. Thus it retains favorably the lubricating film between seal and cylinder wall, even after long standstill periods under high pressure. The breakaway friction and the dynamic friction will be reduced, and there will be considerably less wear of the seal.

Field of application 

Working pressure: ≤ 500 bar

Working temperature: HFA-, HFB and HFC-fluids: +5  to + 60ºC Mineral oil: -20 to +100ºC

Surface speed: ≤ 0,1 m/s

Piston seal for single-acting cylinders in mining hydraulics, e. g. single legs or positioning cylinders.



For the Parker Praedifa piston sealing set profile ZK we recommend open housings. To avoid damaging care
should be taken that the seals are not pulled over sharp edges during installation.


The standard compound for the sealing part is an NBR-based elastomer (Z5017) with the fabric-reinforced dynamic surface. (SFR8-compound). The back-up rings are made of a polyacetal-based material (W5001).

For special requirements (pressure, temperature, speed etc.) please contact our Consultancy Service, so that suitable materials and/or designs

D d L Item number 
150 133 20 ZK 0150 00251
180 163 20 ZK 0180 00251
183 170 15 ZK 0183 00251
200 180 20 ZK 0200 00251
220 200 20 ZK 0219 00251




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