Hi-Tech Seals, Inc. Datasheets for Back-up Rings

Back-up rings or anti-extrusion rings are washer-like devices used to prevent seals from extruding through gaps while under pressure. Seals are installed in the downstream side of the gland.
Back-up Rings: Learn more

Product Name Notes
Back-up Ring -- BNM
Back-up Ring -- BTM
Back-up Ring -- BUM
Back-up rings are plastic or rubber rings used to prevent the O-ring from entering the clearance gap. When high pressures are exerted on the O-ring its soft rubber material can...
Cast Iron Piston Rings -- CI Piston cups are molded packing that have a single sidewall, complete with a sealing lip. The sealing is done by the outer lip, which is beveled and holds pressure unidirectionally.
Anti-Extrusion Rings -- Butt Cut Backup Style Ring
Anti-Extrusion Rings -- Scarf Cut Backup Style Ring
Anti-Extrusion Rings -- Solid Contoured Backup Style Ring
Anti-Extrusion Rings -- Solid Flat Backup Style Ring
Anti-Extrusion Rings -- Spiral Cut Backup Style Ring
The primary function of anti-extrusion rings is to take up space in a groove, and/or prevent extrusion of material at high pressures. Anti-extrusion rings can also be used to assist...