O-Ring Extrusion GAP CHART

Back-up Rings are installed on the downstream side of an O-Ring to help prevent premature failure and leakage. If the o ring cannot resist increasingly higher pressure.

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Back-up Rings for o-rings

  
 

Back-up Rings

Back-up Rings are installed on the downstream side of an O-Ring to help prevent premature failure and leakage. If the sealing ring cannot resist increasingly higher pressure, part of the seal will be forced into the diametrical gap. Back-up rings are used to block the clearance gap and provide support for the seal. Applications which fall on the right side of the curve require use of back-up rings.

PTFE* Back-up Washers
GAP CHART

 

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