Back-Up Rings

A Back Up Ring is a ring of hard, extrusion resistant material such as high-durometer nitrile, nylon, or PTFE, which is designed to fit between an O-ring or U-Seal and an extrusion gap, to prevent the extrusion of the Seal leading to Seal failure.

Seal House stocks a comprehensive range of Metric and Imperial Back Up Rings to suit O-rings in both contoured-face 90 durometer Nitrile or Urethane.

Seal House also stocks a range of U-Seal Back Up Rings to suit either Piston or Gland application.

Seal House can machine Back Up rings to suit almost any application.