Back-up rings are installed to prevent the extrusion of an elastomeric O-ring in its housing groove under certain operating conditions.

FEP-encapsulated O-rings should be used whenever the chemical resistance of an elastomer is inadequate for long-term sealing.

Back-up rings

Manufactured from Fluolion®

  • For use when system pressure exceeds 10 MPa
  • For use when low strength O-rings are installed
  • For use when adverse mechanical conditions prevail

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FEP encapsulated O-rings

When chemical resistance of elastomer is inadequate

  • Seamless FEP sheath completely covers elastomeric core
  • Elastomeric core of fluorocarbon or silicone
  • Can be used with food and pharmaceuticals

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