Valve with replaceable seal element
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United States of America Patent
Stats
-
May 8, 1990
Grant Date -
N/A
app pub date -
Mar 8, 1989
filing date -
Mar 8, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve assembly comprises a rigid seat and a valve for opening and closing the seat. The valve comprises a rigid valve body and an elastomeric seal element mounted on the valve body. The seal element includes smoothly concave seat-engaging surface which tapers in a forward direction. An annular recess formed in a rear surface of the seal element extends to a depth at least one-third of the distance from a rear end to a front end of the concave surface to define therewith a flexible lip. The walls of the recess are oriented such that pressures present behind the valve intensify the engagement of the seal element with both the seat and valve body.
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