Systems and methods for servicing ball valves
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United States of America Patent
Stats
-
Nov 4, 2003
Grant Date -
Apr 17, 2003
app pub date -
Oct 17, 2001
filing date -
Oct 17, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A temporary ball valve support structure is utilized to apply pressure to the ball in a ball valve so that a seal is maintained between the ball and the upstream seal member in the ball valve to prevent fluid from leaking from the valve while the valve is being serviced. The temporary ball valve support allows a downstream seal member and the ball valve retainer housing assembly to be removed. This allows the outer seal and retainer to be replaced and/or serviced without allowing fluid to escape from the tank or pipe. First and second ball support members are alternately used to force the ball member against the upstream seal member.
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