Back-up Ring

Back-up Ring

  • Prevents O-Ring extrusion
  • Prolongs O-Ring service life
  • Allows O-Rings to be utilized in higher pressure applications, where larger extrusion gaps are required and where there are reciprocating or rotating movements
  • Compatible with virtually all media and gases
  • Easy installation
  • Wide range of geometries to meet the needs of all applications
  • Sizes to meet all standards
  • Non-standard sizes also available

Back-up Ring

Back-up Rings are protective and supporting elements with no sealing function. Made from extrusion-resistant materials such as Turcon®, Zurcon®, Hi-Mod® or PEEK they usually have a rectangular cross section and are installed in a groove with an elastomer O-Ring. Due to their tight fit in the housing, Back-up Rings prevent extrusion of the pressurized elastomer sealing element into the clearance or extrusion gap.

Applications


Using Back-up Rings allows O-Rings to be utilized in higher pressure applications, where larger extrusion gaps are required and where there are reciprocating or rotating movements. They also compensate for large temperature fluctuations.

Technical Data
Operating Pressure40 MPa / 5,800 psi
Speed2 m/s / 6.5 ft/s
Temperature Range-200 °C to +260 °C / -392 °F to +500 °F
ClearanceAs per ISO 3601
MediaCompatible with virtually all media and gases

Local Contact

To speak to a local oil & gas specialist, call the number listed for your region:

Americas
+1 713 461 3495

Asia
+65 6577 1778

Europe
+44 (0)1224 355345

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