Choosing Backup Rings: A Guide
Maggie
July 29, 2026
July 29, 2026
What Are Backup Rings and Why Are They Important? Backup rings, also known as anti-extrusion rings, are rigid sealing components installed alongside elastomer O-rings to prevent seal extrusion when systems operate under elevated pressure. In hydraulic, pneumatic, chemical processing, aerospace, and heavy industrial equipment, pressure can force an O-ring into the clearance gap between mating components. Once extrusion begins, the
