Dynamic ball valve sealing device for three-way valves
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United States of America Patent
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-
May 11, 2010
Grant Date -
Dec 25, 2008
app pub date -
Jun 21, 2007
filing date -
Jun 21, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A ball valve having improved sealing between the valve member and the valve body is presented. Improved sealing is realized by providing a sealing member that is allowed to float on the outer surface of the valve member in the closed position. By being able to float on the outer surface, the sealing member can compensate for any variations in the valve member as a result of machining tolerances or variations in position of the valve member due to changes in pressure within the valve, thereby providing dynamic sealing The dynamic sealing is also provided by configuring the valve member such that it causes the sealing member to be exposed to a higher biasing force in the closed position than in the open position.
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Family
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Cited Art Landscape
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