Back up ring
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Detailed Product Description
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Back-up rings are plastic or rubber rings used to prevent the
O-ring from entering the clearance gap. When high pressures are
exerted on the O-ring, its soft rubber material can be forced into
the clearance gap causing the O-ring to extrude (see our O-ring
brochure for examples of O-ring failure). The hard back-up ring
material will keep the O-ring material from flowing into the gap
which will prevent premature failure. Type of Back up ring: BRT3,
BRT4 , N4B , N4W , T3P , T3G .
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