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What materials are Parbak backup rings made from?

April 26, 2017backup Materials parbak Rings

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What materials are Parbak backup rings made from?

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Parbaks are generally made in N1444-90, a 90 durometer nitrile (NBR) rubber material specifically developed for use as a backup ring material. Backup rings are also available in N0300-90 (NBR,) E0652-90 (EPDM,) V0709-90 (FKM,) V1238-95 (high pressure FKM,) and V8588-90 (Parofluor.