Back up ring

Listing ID #3589804

Backup Rings prevent extrusion of O Rings In high pressures usually above 1500 PSI & compensate for loose fitting components. If only one backup ring is used, the O Ring should be placed between the pressure source & the backup ring. One backup ring should be used on each side of the O Ring in double acting assemblies if possible two backups should be used even in single acting assemblies.