Complete piston with integrated seals Prädifa series DK | Product Series

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Inside Diameter (mm)

Element Height (mm)

Groove Width

Minimum Working Temperature (C)

Maximum Working Temperature (C)

Seal Material

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Complete piston with integrated seals Prädifa series DK Complete piston with integrated seals Prädifa series DK

Complete piston with integrated seals Prädifa series DK

Where to Buy

Complete pneumatic piston, double-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), Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)
  • Maximum Operating Pressure: 16 bar
  • Minimum Operating Temperature: -35 to -10 °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 double-acting DK pneumatic piston is a two-component seal design consisting of a metallic supporting element with a vulcanized guiding ridge and sealing lips. 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 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.
• 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 double-acting pneumatic cylinders with and without cushioning, provided that no excessive lateral guidance loads will occur (long strokes and buckling).

The DK complete piston with integrated end position cushioning is available in the following compounds:
Z5051 – Industrial purpose
Z5071 – Heavy-duty
Z5067 – High temperatures
Z5086 – Medium-duty

Related Documents

Literature and Reference Materials
Pneumatic Seals--PTD3351
Complete piston DK--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
Communities, Blogs & Industry Links
Industry Pneumatics
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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
DKA012Z5051 100 12 25 6 -30 80 Z5051
DKA016Z5051 100 16 25 6 -30 80 Z5051
DKA019Z5051 100 20 26 6 -30 80 Z5051
DKA024Z5051 100 24 26 6 -30 80 Z5051
DKC520Z5050 125 20 26 5 -30 100 Z5050
DKC522Z5050 125 20 28 7 -30 100 Z5050
DKD020Z5050 130 20 29 8 -30 100 Z5050
DKE022Z5050 140 22 29 6 -30 100 Z5050
DKF020Z5050 150 20 29 10 -30 100 Z5050
DKG027Z5050 160 27 29 6 -30 100 Z5050
DKG027Z5067 160 27 29 6 -20 200 Z5067
DKL027Z5050 200 27 35 10 -30 100 Z5050
DKL030Z5050 200 30 35 10 -30 100 Z5050
DKN130Z5050 250 30 40 15 -30 100 Z5050
DKN131Z5050 250 30 40 12 -30 100 Z5050
DK1631Z5051 16 5 12 3 -30 80 Z5051
DK2031Z5051 20 6 12 3 -30 80 Z5051
DK2500Z5051 25 0 12 3 -30 80 Z5051
DK2506Z5051 25 6 12 3 -30 80 Z5051
DK3200Z5051 32 0 15 3 -30 80 Z5051
DK3200Z5086 32 0 15 3 -20 120 Z5086
DK3205Z5051 32 5 18 3 -30 80 Z5051
DK3206Z5051 32 6 15 3 -30 80 Z5051
DK3207Z5051 32 8 15 3 -30 80 Z5051
DK3207Z5067 32 8 15 3 -20 200 Z5067
DK3508Z5051 35 8 15 3 -30 80 Z5051
DK4007Z5051 40 8 18 4 -30 80 Z5051
DK4008Z5051 40 8 20 4 -30 80 Z5051
DK4009Z5051 40 10 18 4 -30 80 Z5051
DK4009Z5067 40 10 18 4 -20 200 Z5067
DK4009Z5071 40 10 18 4 -35 100 Z5071
DK4009Z5142 40 10 18 4 -10 200 Z5142
DK5008Z5051 50 8 20 4 -30 80 Z5051
DK5008Z5087 50 8 20 4 -20 120 Z5087
DK5010Z5051 50 10 18 4 -30 80 Z5051
DK5010Z5067 50 10 18 4 -20 200 Z5067
DK5010Z5071 50 10 18 4 -35 100 Z5071
DK5016Z5051 50 16 20.5 4 -30 80 Z5051
DK5020Z5086 50 0 20 4 -20 120 Z5086
DK6012Z5051 60 12 21 4 -30 80 Z5051
DK6012Z5346 60 12 21 4 -35 100 Z5346
DK6018Z5051 60 18 21 4 -30 80 Z5051
DK6312Z5051 63 12 22 5 -30 80 Z5051
DK6316Z5051 63 16 21.5 4 -30 80 Z5051
DK6316Z5071 63 16 21.5 4 -35 100 Z5071
DK7012Z5051 70 12 22 5 -30 80 Z5051
DK8013Z5051 80 12 22.5 5 -30 80 Z5051
DK8016Z5051 80 16 22.5 5 -30 80 Z5051
DK8016Z5146 80 16 22.5 5 -30 80 Z5146
DK8020Z5051 80 20 22.5 5 -30 80 Z5051
DK8020Z5067 80 20 22.5 5 -20 200 Z5067
DK2508Z5051 25 8 12 4 -30 80 Z5051
DK3210Z5051 32 8 15 6.5 -30 80 Z5051
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