Parker Prädifa Piston Seals DE

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The single-acting Parker Prädifa pneumatic complete piston DE is a two-component seal design, consisting of a metallic carrier with a vulcanized guiding surface and sealing lip. The complete piston performs three functions: sealing, guiding, and end-position cushioning.

  • Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
  • Cushioning buffers on the piston´s front faces with integrated ventilation ducts provide for mechanical cushioning of the cylinders.
  • Multi-functional element: seal, guiding, and cushioning element.
  • Immediate response (full pressure load) thanks to incorporated venting channels.
  • Good wear resistance.
  • Ideal corrosion protection thanks to complete elastomer covering.
  • Smooth running due to optimum adjustment of the functional lips.
  • Easy attachment to the piston rod without additional sealing elements.
  • Easy installation due to integrated static sealing function.
  • Excellent media resistance in case of suitable compound selection.
  • Also available as a double-acting version.
  • The low assembly height of the complete piston enables the short cylinder designs.
  • Versatile complete piston for nearly all cylinder designs.

Range of application

Complete piston for single-acting pneumatic cylinders with end cushioning provided that no excessive lateral guidance loads will occur (long strokes and buckling).

Operating pressure ≤ 12 bar
Operating temperature -30 °C to +80 °C
Sliding speed ≤ 1 m/s
Media Compressed air, both lubricated and oil-free (after greasing for fitting)

Compounds

The standard compound is an elastomer (NBR-based) with a hardness of approx. 71 Shore A and vulcanized to a metal disc.

Installation

The profile DE complete piston is fixed to the piston rod with a locknut to avoid loosening. For use with dry and oil-free air, the piston and cylinder tube must be relubricated with a suitable long-life lubricant.

D d H Order code
6 2 2.8 DE0602Z5144
8 3 3.7 DE0803Z5117
10 3 3.7 DE1003Z5117
12 4.5 4.4 DE1203Z5117
16 4.5 4.4 DE1603Z5117
20 6 5.5 DE2005Z5117
25 7 6.4 DE2506Z5117
32 8 7.5 DE3208Z5117
40 8 8.5 DE4008Z5117
50 10 10 DE5010Z5117
63 12 10 DE6312Z5117
80 16 11.4 DE8016Z5117
100 20 12.9 DEA020Z5117

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