Ningbo Jiaodian Sealing Industry Co., Ltd.
Back-up rings are 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 . The hard Back-up Ring material will keep the O-ring material from flowing into the gap which will prevent premature failure.
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