Backup Rings
Back-up Rings, also known as anti-extrusion rings, are made and used to give the O-Ring additional support and strength to reduce any risk of extrusion by the O-Ring while it is under pressure in the housing. There are five common styles of Back-up rings. These are, Solid, Split, Contoured, Single Turn and Spiral cut.
The Back-up Ring will be made of a firmer, more rigid material than the O-Ring being used. However, the Back-up will still be elastic enough to deform while under the stress to make sure the extrusion gap is closed.
As Back-up Rings are made to be used with O-Rings, they will come in standard manufactured sizes to suit whatever size O-Ring you are using.
We can also manufacture custom Back-up Rings to suit the size of your need.