Composite sealing washer Prädifa series WO | Product Series

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Inside Diameter (mm)

Outside Diameter (mm)

Element Height (mm)

Groove Width

Minimum Working Temperature (C)

Maximum Working Temperature (C)

Seal Material

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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)
Safety Warning

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

Literature and Reference Materials
Composite Sealing Washers--PTD3358
Composite sealing washer WO--PTD3358
Contact & Support Information
Application Data Sheet (ADS)
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 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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