Complete piston with integrated seals Prädifa series EK | Product Series

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Inside Diameter (mm)

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Maximum Working Temperature (C)

Seal Material

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Complete piston with integrated seals Prädifa series EK Complete piston with integrated seals Prädifa series EK

Complete piston with integrated seals Prädifa series EK

Where to Buy

Complete pneumatic piston, single-acting.

Technical Specifications

  • Thermal Application Type: High Temperature (< 205°C), Standard Moderate Temperature (-35 to 100°C)
  • Media: Pneumatic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM)
  • Maximum Operating Pressure: 16 bar
  • Minimum Operating Temperature: -30 to -20 °C
  • Maximum Operating Temperature: 80 to 200 °C
  • Maximum Surface Speed: 1 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Pressure Rating: Pneumatic Pressure (< 16 bar)
Safety Warning

Full Product Description

The single-acting pneumatic complete piston EK 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 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 selection.
• Also available as double-acting version.
• Low assembly height of the complete piston enables 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).

The EK complete piston with integrated seals is available in the following compounds:
Z5051 - Industrial applications

Related Documents

Literature and Reference Materials
Pneumatic Seals--PTD3351
Complete piston EK--PTD3351
Installation Guidelines for Piston Seals--PTD3351
Product Demos & Tutorials
How to Properly Store and Clean Elastomer Seals
Mixing the right ingredients: Material Development at Parker-Prädifa
Parker Final Exam in Physics / Sealing Systems Put to the Test
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Products Outside Diameter (mm) Inside Diameter (mm) Element Height (mm) Groove Width Minimum Working Temperature (C) Maximum Working Temperature (C) Seal Material
EKC520Z5050 125 20 17.6 5 -30 100 Z5050
EKE022Z5050 140 22 19.6 6 -30 100 Z5050
EKL027Z5050 200 27 24.55 10 -30 100 Z5050
EK2508Z5051 25 8 7.9 3 -30 80 Z5051
EK3208Z5051 32 8 10.65 3 -30 80 Z5051
EK4009Z5051 40 10 12.4 4 -30 80 Z5051
EK4014Z5051 40 14 13.4 4 -30 80 Z5051
EK5010Z5051 50 10 12.8 4 -30 80 Z5051
EK5014Z5051 50 14 13.4 4 -30 80 Z5051
EK5016Z5051 50 16 14 4 -30 80 Z5051
EK6332Z5051 63 27 14.1 4 -30 80 Z5051
EK8013Z5051 80 12 15.2 5 -30 80 Z5051
EK8016Z5051 80 16 15.2 5 -30 80 Z5051
EK8027Z5051 80 27 15.35 5 -30 80 Z5051
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