Piston sealing set Prädifa series OT | Product Series

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Inside Diameter (mm)

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Piston sealing set Prädifa series OT

Piston sealing set Prädifa series OT

Where to Buy

Piston sealing set, slipper seal, double-acting, especially suitable for aggressive media and/or high temperatures

Technical Specifications

  • Maximum Operating Temperature: 110 to 200 °C
  • Thermal Application Type: High Temperature (< 205°C), Low Temperature (< -35 C), Standard Moderate Temperature (-35 to 100°C)
  • Media: Hydraulic
  • Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®)
  • Maximum Operating Pressure: 400 bar
  • Minimum Operating Temperature: -50 to -25 °C
  • Maximum Surface Speed: 4 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Pressure Rating: High Pressure (< 500 bar)
Safety Warning

Full Product Description

The double-acting piston sealing set profile OT featuring a Slipper Seal® design stands out by its minimal break-away and dynamic friction and is therefore also suitable for low-lube conditions. The seal design enables fast reaction in reciprocating pressure loads.
The material combination of the slipper ring (PTFE) and the O-ring (elastomer) makes this product suitable for a wide Range of application:s, especially for aggressive media and/or high temperatures. Multiple compounds can alternatively be selected according to the individual application profile.

• Good sealing performance in extremely small assembly conditions.
• Can also be used for single-acting applications.
• Excellent wear resistance.
• Minimal break-away and dynamic friction and no stick-slip tendency ensures uniform motion even at low speeds.
• Good energy efficiency due to low friction.
• Assembly on one-part piston is possible.
• Insensitive to pressure peaks.
• High temperature resistance assured by suitable O-ring compound selection.
• High extrusion resistance.
• Adaptable to nearly all media thanks to high chemical resistance of the sealing ring and large O-ring compound selection.
• Dimensions according to ISO 7425-1.
• Short axial assembly length.
• Installation in closed and undercut housings.
• Available in diameters from 4 to 3000 mm.
• Additional sizes of machined products available on short notice.

Range of application:
Wide Range of application:s, especially for aggressive media and/or high temperatures.
The OT piston sealing set is particularly suitable for double-acting pistons in control cylinders, servo-controlled systems and machine tools.

Related Documents

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
Literature and Reference Materials
PTFE Seals Design Guide--PTD3354
Installation Guidelines for Piston Seals--PTD3350
Slipper Seal®-- Piston sealing set OT--PTD3354
Storage and Cleaning of Elastomer Seals--PTD3032
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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
OT125005200231E 125.0 104.0 8.1 8.1 -25 110 PS052
OT125005200232E 125.0 104.0 8.1 8.1 -25 110 PS052
OT130005200231D 130 114.5 6.3 6.3 -30 110 Polytetrafluorethylene additives
OT250031400231E 250 229 8.1 8.1 -30 110 Ultra High Molecular Weight Polyethylene
OT300031400231E 300 279 8.1 8.1 -30 110 Ultra High Molecular Weight Polyethylene
OT360031400231F 360 335.5 8.1 8.1 -30 110 Ultra High Molecular Weight Polyethylene
OT180005200231E 180 159 8.1 8.1 -30 110 PS052
OT200005200231E 200 179 8.1 8.1 -30 110 PS052
OT250005200231E 250 229 8.1 8.1 -30 110 PS052
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