Piston sealing set Prädifa series OA, Polon® | South Africa

Piston sealing set Prädifa series OA, Polon® | Product Series

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Piston sealing set Prädifa series OA, Polon®

Where to Buy

Piston sealing set for pneumatic cylinders, double-acting, PTFE slipper seal design. Low friction.

Technical Specifications

  • Maximum Operating Temperature: 80 to 230 °C
  • Thermal Application Type: Expanded Low and High Temperature (< -35 to 140°C), Low Temperature (< -35 C), High Temperature (< 205°C), Standard Moderate Temperature (-35 to 100°C)
  • Media: Pneumatic
  • Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®), Ultra-High Molecular Weight Polyethylene (UHMW-PE)
  • Maximum Operating Pressure: 16 bar
  • Minimum Operating Temperature: -200 to -20 °C
  • Maximum Surface Speed: 4 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Pressure Rating: Pneumatic Pressure (< 16 bar)
Safety Warning

Full Product Description

The double-acting OA piston sealing set featuring a Slipper Seal® design consists of a PTFE piston sealing ring and an elastomer O-ring as a preloading element. The seal design is intended for pneumatic applications. The symmetrical cross section of the sealing ring is designed for uniform formation of the lubricant film during the stroke in both directions. The OA sealing set is particularly well suited for double-acting pistons.

Due to the material combination of the slide ring (PTFE) and O-ring (elastomer), this product is suitable for a wide range of applications, especially for aggressive media and/or high temperatures. For pneumatic applications, the piston sealing ring is preferably made from a carbon-filled PTFE compound in order to avoid chemical reactions with the aluminum components of the cylinder. Alternatively, several compounds can be selected, depending on the specific applications profile.

• Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
• Good sealing performance in extremely small assembly conditions.
• Can also be used for single-acting applications.
• Good wear resistance.
• Minimal break-away and dynamic friction and no stick-slip tendency ensures uniform otion even at low speeds.
• Good energy efficiency due to low friction.
• Very good emergency running properties in low-lube conditions.
• Assembly on one-part piston is possible.
• High temperature resistance assured by suitable O-ring compound selection.
• Adaptable to nearly all media thanks to high chemical resistance of the sealing ring and arge O-ring compound selection.
• Short axial assembly length.
• Installation in closed and undercut housings.
• Available in diameters from 4 to 3000 mm.
• Machined small-volume series and samples available with short lead times.

Range of application:
Piston sealing set for pneumatic applications.

Related Documents

Literature and Reference Materials
Pneumatic Seals--PTD3351
Compound Data Sheet NBR N0674
Installation Guidelines for Piston Seals--PTD3351
Slipper Seal®--Piston sealing set OA--PTD3350
Storage and Cleaning of Elastomer Seals--PTD3032
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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