Flowline flapper valve
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United States of America Patent
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-
Sep 11, 2012
Grant Date -
Oct 21, 2010
app pub date -
Apr 20, 2010
filing date -
Apr 20, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A check valve assembly has a body having a central cavity intersected by upstream and downstream flow passages. A seat is secured by a threaded engagement in the upstream flow passage. An access bore intersects the cavity and has a support shoulder formed in it. A holder is supported on the support shoulder. A flapper is pivotally secured to the holder and located in the cavity for movement between an open position and a closed position blocking flow through the seat. A straight edge portion in the access bore engages a straight edge portion of the holder to prevent rotation of the holder. A fastener extends through a hole in the support shoulder into engagement with the seat to prevent rotation of the seat.
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