The Parker Prädifa PZ pneumatic  piston seal has been developed for use in pneumatic cylinders and in valves. The double-acting piston seal requires only very small housing dimensions and is therefore especially suitable for compact cylinders.

• Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
• Good sealing performance in extremely small assembly conditions.
• It can also be used for single-acting applications.
• Good wear resistance.
• Low static and dynamic friction thanks to the miniaturized design.
• Smooth running due to the optimum lubricant-retaining sealing lip geometry.
• Suitable for fully automatic installation.
• Assembly on the one-part piston is possible.
• High-temperature resistance in case of suitable compound selection.
• Excellent media resistance in case of suitable compound selection.
• Short axial assembly length.
• Installation in closed housings.

Range of application

 Compounds

Standard: N3571, NBR compound (≈ 70 Shore A).

For low temperatures: N8602, NBR compound (≈ 70 Shore A). For high temperatures: V3681, FKM compound (≈ 80 Shore A).

Installation

The Parker Praedifa profile PZ pneumatic piston seals can be easily mounted into the grooves by simply pulling them over the piston.

To avoid damaging the seal, sharp edges should be removed from the piston and the cylinder tube.

For oil-free conditions, it is important to obtain a full lubrication film inside the cylinder tube prior to assembly to ensure the long service life of the seal.

For piston guidance, we recommend our profile F2 piston guidance tape. For dimensions of pistons and clearances, please refer to our profile F2.