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STANDARD BACK UP RING

Used primarily as an anti-extrusion device, standard back-up rings are used in both static and dynamic sealing. Made of materials that are resistant to pressure induced flow, the back-up ring keeps a seal from extruding into the clearance gap between mating parts.

 

CONTOURED BACK-UP RING

Contoured back-up rings are anti-extrusion devices used in both static and dynamic sealing environments. They’re also useful when mating part clearances are not tightly controlled. In either case, they can extend the useful life of O-Rings. Contoured back-up rings have a slightly concave face on one side, providing uniform contact with the entire diameter of the O-Rings they are used with. Sizes correspond with AS568 O-Rings. Whenever possible, the use of two back-up rings is recommended, even in single-acting applications.

Stock material is 90 durometer nitrile. The temperature range is -40°F to +250°F

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