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 two functions: sealing and guiding.
- Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
- 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 the optimum lubricant-retaining sealing lip geometry.
- 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 selections.
- 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 and without end position cushioning, provided that no excessive lateral guidance loads will occur (long strokes and buckling).
Operating pressure | ≤ 16 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, resp. 78 Shore A for diameters > 100 mm.
Installation
The Parker Praedifa profile EK 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.
It must be assured that the sealing lips do not touch the cylinder bottom and the cylinder cap at the limit stops (see also dimension „Ø dm“).
D | d | H | Order code |
25 | 8 | 7.9 | EK2508Z5051 |
32 | 8 | 10.65 | EK3208Z5051 |
40 | 10 | 12.4 | EK4009Z5051 |
40 | 14 | 13.4 | EK4014Z5051 |
50 | 10 | 12.8 | EK5010Z5051 |
50 | 14 | 13.4 | EK5014Z5051 |
50 | 16 | 14 | EK5016Z5051 |
63 | 27 | 14.1 | EK6332Z5051 |
80 | 12 | 15.2 | EK8013Z5051 |
80 | 16 | 15.2 | EK8016Z5051 |
80 | 27 | 15.35 | EK8027Z5051 |
125 | 20 | 17.6 | EKC520Z5050 |
140 | 22 | 19.6 | EKE022Z5050 |
200 | 27 | 24.55 | EKL027Z5050 |
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