SEAL ARRANGEMENT WITH CORROSION BARRIER AND METHOD

摘要

A guard barrier arrangement is used in an O-ring seal arrangement to limit reactive species in coming into contact with an O-ring. The arrangement is supported in a chamber passage for exposure to the reactive species. An o-ring is compressed so as to peripherally resiliently bias the guard ring arrangement further into the chamber passage configuration toward the chamber interior to limit access of the reactive species to the o-ring. The passage configuration can use a narrowing surface arrangement against which the barrier arrangement is urged. The barrier can include an annular configuration that can change responsive to being biased into the chamber passage configuration.