Method and apparatus for sealing valve stems
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United States of America Patent
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-
Dec 3, 1985
Grant Date -
N/A
app pub date -
Dec 21, 1983
filing date -
Dec 21, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve is provided with an improved seal between the valve body and the rotatable valve stem. A high pressure fluid seal is formed by a pressure-responsive lip seal. A spring positioned between the lip seal and the valve stem sealing surface provides a substantially axially directed force to a metal O-ring, which biases the lip seal into sealing engagement with the valve body and stem under relatively low pressure.
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