Back Up Rings

Back up rings are used alongside O-rings and other soft seals to prevent extrusion in high-pressure sealing environments. Placed in the groove behind the primary seal, they provide additional support and help maintain sealing integrity under pressure. Commonly made from PTFE or other rigid materials, back up rings improve performance in demanding hydraulic and pneumatic systems. They are widely used in valves, cylinders, pumps, and heavy-duty equipment where pressure spikes or large gaps are present.

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Back Up Rings
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Back Up Rings
The PTFE back up rings are proven components used for sealing both low and high-pressure systems. Any system pushing the pressure limits on an elastomer seal, back-up rings are an inexpensive option to increase seal pressure capabilities or increase radial extrusion gaps behind the seal.
The back-up rings come standard in Virgin PTFE but can be made from any filled PTFE compound to increase the pressure capabilities.
PEEK, POM, and Nylon back up rings are also made.
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