Composite sealing washer Prädifa series WO | Product Series

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Outside Diameter (mm)

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Seal Material

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Composite sealing washer Prädifa series WO Composite sealing washer Prädifa series WO Composite sealing washer Prädifa series WO

Composite sealing washer Prädifa series WO

Where to Buy

Composite sealing washer for medium-pressure applications with advanced bonding geometry

Technical Specifications

  • Media: Hydraulic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)
  • Maximum Operating Pressure: 1500 bar
  • Minimum Operating Temperature: -30 to -20 °C
  • Maximum Operating Temperature: 100 to 200 °C
  • Maximum Surface Speed: 0 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Thermal Application Type: High Temperature (< 205°C), Standard Moderate Temperature (-35 to 100°C), Expanded Low and High Temperature (< -35 to 140°C)
  • Pressure Rating: Extremely High Pressure (> 500 bar)

Full Product Description

The WO composite sealing washer is designed for radial sealing below the screw head in the area of the smooth (non-threaded) screw shaft. This provides three functionally relevant sealing areas. WO consists of a metal washer and an elastomer sealing lip with a circular cross section and additional mechanical connection to the inside edge of the supporting washer. The serrations achieve a positive connection of the elastomer with the supporting washer and prevent the phenomenon of sheared sealing lips which is frequently encountered with composite sealing washers.

Range of application:
Static sealing of flanges or screw heads.

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
Contact & Support Information
Application Data Sheet (ADS)
Literature and Reference Materials
Multiway Coolant Valve Seal
Composite Sealing Washers--PTD3358
Composite sealing washer WO--PTD3358
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Products Inside Diameter (mm) Outside Diameter (mm) Element Height (mm) Groove Width Minimum Working Temperature (C) Maximum Working Temperature (C) Seal Material
WO0134Z5413 18.8 33.58 1.63 1.63 -30 100 Z5413
WO0813Z5413 7.77 13.49 1.27 1.27 -30 100 Z5413
WO0815Z5195 7.65 15.32 1.27 1.27 -30 100 Z5195
WO1015Z5255 9.73 15.32 1.27 1.27 -20 130 Z5255
WO1427Z5296 13.66 22.35 1.27 1.27 -20 200 Z5296
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