Backup O Ring Sizes

The most important criteria that influence the maximum operating pressure at which o rings in static radial sealing can be used.

Backup o ring sizes. Rubber contoured backup ring size chart. O ring face seal braze adapters. O rings are o shaped ring packings. Ptfe back up ring size standards an6244 an6246 ms27595 ms28774 ms28782 and ms28783.

This is the standard anti extrusion device for o rings and other seals. Elastomer back up rings fit standard usa and custom o ring sizes. Standard back up ring ms28774 sizes. 132 d 8 o ring surface finishing 133 back up rings 135 e general information 136 f back up ring types 136 f 1 overview 137 f 2 back up ring types for external sealing piston 138 f 3 back up ring types for internal sealing rod 139 g technical information 139 g 1 materials 139 g 2 technical data 140 g 3 design recommendations.

D 3 ptfe o rings d 4 polyurethane o rings d 5 fleximold o rings large dimensions d 6 round cord rings butt vulcanized d 7 o ring surface finishing 115 back up rings 117 e general information 118 118 119 120 f back up ring types f 1 overview f 2 back up ring types for external sealing piston f 3 back up ring types for internal sealing rod. Backup o rings ensure that the primary o ring continues to provide the proper seal between opposing parts even under pressure. When first installed o rings are specked to fit perfectly but when continually exposed to pressure and high temperatures they lose material weaken and extrude beyond the groove in which they rest. O ring face seal to straight thread o ring.

To view dimensions of all american standard sizes for backup rings scroll down to see our backup ring size chart. They are appropriately compressed by fitting into grooves and prevent leakage of various fluids including oil water air and gas. Rubber contoured backup ring size chart. This is the standard anti extrusion device for o rings and other seals.

Rubber contoured backup ring size chart. O ring face seal to 37 flare. Ptfe back up rings can be solid split spiral or custom for ease of install. Rubber contoured backup ring size chart.

O ring face seal to pipe. Elastomer back up rings are typically contoured to conform to an o ring. O rings and back up rings maintain sealing contact force by radial or axial deformation in the seal housing between two machine components. In a sealing application backup rings provide added extrusion resistance and prevent damage to o rings and seals when subjected to high pressures larger extrusion gaps and or high temperatures.