Complete piston with integrated seals Prädifa series DR | Product Series

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Complete piston with integrated seals Prädifa series DR Complete piston with integrated seals Prädifa series DR

Complete piston with integrated seals Prädifa series DR

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Complete pneumatic piston with inductive position interrogation and mechanical cushioning function, double-acting.

Technical Specifications

  • Thermal Application Type: Standard Moderate Temperature (-35 to 100°C), Low Temperature (< -35 C)
  • Media: Pneumatic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)
  • Maximum Operating Pressure: 12 bar
  • Minimum Operating Temperature: -35 to -20 °C
  • Maximum Operating Temperature: 100 to 150 °C
  • Maximum Surface Speed: 1 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: Yes
  • Pressure Rating: Pneumatic Pressure (< 16 bar)
Safety Warning

Full Product Description

The double-acting DR pneumatic piston is a multi-component seal design consisting of a multi-part metallic supporting element with a vulcanized guiding ridge, sealing lips and an integrated magnet for inductive position sensing. The complete piston performs four functions: sealing, guiding, position sensing and end position cushioning.
The extemely slim complete piston is suitable for use in diverse cylinder designs and with various sensors. The combination of all functions – sealing, guiding, cushioning, sensing – in a single component ensures ease of installation and additionally offers handling and logistics cost benefits.

• Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
• Use of different types of sensors (inductive) is possible.
• 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.
• Low assembly height of the complete piston enables short cylinder designs.
• Versatile complete piston for nearly all cylinder designs.

Range of application:
Complete piston with end cushioning for double-acting pneumatic cylinders, provided that no excessive lateral guidance loads will occur (long strokes and buckling).

The DR complete piston with integrated end position cushioning is available in the following compounds:
Z4004 – Industrial purposes
Z4005 – Medium-duty
Z4012 – Low temperatures

Related Documents

Literature and Reference Materials
Pneumatic Seals--PTD3351
Installation Guidelines for Piston Seals--PTD3351
Magnetic piston with integrated cushioning DR--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
DRA020Z4004 100 20 17.9 8.5 -35 100 Z4004
DRA020Z4018 100 20 17.9 8.5 -35 100 Z4018
DRA020Z4019 100 20 17.9 8.5 -20 150 Z4019
DRA020Z4020 100 20 17.9 8.5 -35 100 Z4020
DR1604Z4004 16 4.5 6.5 2.950 -35 100 Z4004
DR1604Z4005 16 4.5 6.5 2.950 -20 150 Z4005
DR2006Z4004 20 6 7.5 3.950 -35 100 Z4004
DR2006Z4005 20 6 7.5 3.950 -20 150 Z4005
DR2006Z4012 20 6 7.5 3.950 -35 100 Z4012
DR2507Z4004 25 7 7.5 3.950 -35 100 Z4004
DR2507Z4005 25 7 7.5 3.950 -20 150 Z4005
DR3208Z4004 32 8 10.9 5.5 -35 100 Z4004
DR3208Z4005 32 8 10.9 5.5 -20 150 Z4005
DR4008Z4004 40 8 11.9 5.5 -35 100 Z4004
DR4008Z4005 40 8 11.9 5.5 -20 150 Z4005
DR5010Z4004 50 10 13.8 6.5 -35 100 Z4004
DR5010Z4018 50 10 13.8 6.5 -35 100 Z4018
DR5010Z4019 50 10 13.8 6.5 -20 150 Z4019
DR5010Z4020 50 10 13.8 6.5 -35 100 Z4020
DR6312Z4004 63 12 13.8 6.5 -35 100 Z4004
DR6312Z4005 63 12 13.8 6.5 -20 150 Z4005
DR6312Z4018 63 12 13.8 6.5 -35 100 Z4018
DR6312Z4019 63 12 13.8 6.5 -20 150 Z4019
DR8016Z4004 80 16 15.9 7.5 -35 100 Z4004
DR8016Z4018 80 16 15.9 7.5 -35 100 Z4018
DR8016Z4019 80 16 15.9 7.5 -20 150 Z4019
DR8016Z4020 80 16 15.9 7.5 -35 100 Z4020
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