spiral multiturn backup o ring

PTFE Backup rings PTFE backup rings are used for static and dynamic applications. It's better used for static sealing applications with corresponding O-ring. The use of PTFE backup ring will help control O-ring extrusion in high pressure applictions. PTFE ...

...backup ring is a flat, split, spiral or wave washer type accessory Back-up Rings are flat, split, spiral or contoured washer type fittings used to protect an O-Ring seal from extrusion at higher pressures and temperatures. A Back-up Ring works by blocking or reducing the extrusion gap, thus preventing the o-ring from extruding. product name Backup Ring...