Check valve for a submersible turbine pump
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United States of America Patent
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-
Jan 15, 2008
Grant Date -
May 12, 2005
app pub date -
Oct 6, 2004
filing date -
Oct 11, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a submersible turbine pump (STP) comprising a check valve located within a hydraulics cavity, wherein the STP provides the ability to depressurize the hydraulics cavity by relieving a pressure differential between an inlet side and an outlet side of the check valve. In general, the STP is comprised of a casing body comprising a check valve extraction housing and the hydraulics cavity. The check valve is located within the hydraulics cavity and is comprised of a check valve stem, an inlet side, and an outlet side. The check valve extraction housing comprises a lock-down screw adapted to attach to the check valve stem and apply a force to the check valve to open the check valve, thereby relieving the pressure differential between the inlet side and the outlet side.
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