Closure seal for high pressure vessel
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United States of America Patent
Stats
-
Aug 7, 1984
Grant Date -
N/A
app pub date -
Aug 3, 1983
filing date -
Aug 3, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Sealing between an access opening in a pressure vessel and a closure member fitted in the opening is provided by an O-ring of perfluoroelastomer in an annular groove formed in a surface of the closure member. The sidewall of the groove on the low pressure side of the seal has a concave curvature in cross section so as to form a 'hook' or lip which retains the O-ring in the groove and prevents creeping extrusion of the O-ring under prolonged exposure to high temperature and pressure fluid on the high pressure side of the seal, even with a clearance between the closure member and the access opening of up to approximately 1 percent of the diameter of the O-ring cross section.
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