Seal Extrusion
Extrusion is a Common source of seal failure in both static and dynamic applications.The o-ring illustrated failed when it was extruded from the groove. Part or all of the seal is forced from the froove by high continuous or pulsating pressure on the seal. If left uncorrected, the entire cross-section will eventually disintegrate.
Follow these easy rules to minimize the risk of seal extrusion:
1. Choose a seal configuration and material designed to withstand the anticipated pressure.
2. Make sure the clearance between adjacent surfaces is appropriate for the hardness of the material. Clearance should be minimized and must not exceed recommended limits for the rubber hardness