Anti-extrusion rings

The anti-extrusion rings are used in dynamic and static sealings, for applications of rods or pistons.
Their function is to reduce the seal creep(ring or four lobes) when the pressures and mechanical play is important.

There are three standard profiles anti-extrusion ring

AES: Anti-extrusion Spiral
AEM: Massive Anti-extrusion
ACS: Anti-extrusion Concave