Flowline flapper valve
AssigneeS.P.M. Flow Control, Inc.
InventorsBrian Witkowski, Nuder Said
Life of this patent
Estimating the term…
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.
Claims22
A check valve assembly, comprising:
- a body having a central cavity intersected by upstream and downstream flow passages;
- a shoulder formed in the body;
- a holder positionable onto the shoulder, the holder including a lip extending around its periphery to facilitate complimentary engagement with the shoulder
- a flapper pivotally secured to the holder, the flapper movable between a closed position, to block fluid flow through the upstream flow passage, and an open position, to enable fluid flow through the upstream flow passage;
- and
- a seat disposed proximate the upstream flow passage, the seat including exterior threads threadingly engaging corresponding internal threads on the upstream flow passage, the seat includes a downstream side having a larger diameter than an upstream side of the seat and the diameter of the seat threads to define a flange having an upstream facing shoulder, wherein the seat is configured to engage the flapper when the flapper is in the closed position.
A check valve assembly, comprising:
- a body having a central cavity intersected by upstream and downstream flow passages;
- a shoulder formed in the body;
- a holder positionable onto the shoulder, the holder including a lip extending around its periphery to facilitate complimentary engagement with the shoulder
- a flapper pivotally secured to the holder, the flapper movable between a closed position, to block fluid flow through the upstream flow passage, and an open position, to enable fluid flow through the upstream flow passage;
- and
- a seat disposed proximate the upstream flow passage, the seat includes a downstream side having a larger diameter than an upstream side of the seat to define a flange having an upstream facing shoulder, wherein the seat is configured to engage the flapper when the flapper is in the closed position, and the upstream facing shoulder is spaced apart from and forming a gap between an upstream wall of the central cavity.
A check valve assembly, comprising:
- a body having a central cavity intersected by upstream and downstream flow passages;
- the upstream flow passage having a set of internal threads adjacent the cavity and a downstream facing shoulder upstream from the internal threads;
- a seat having upstream and downstream sides, a central orifice extending therethrough, an outer surface having a set of external threads that engage the internal threads in the upstream flow passage, the upstream side of the seat having a seal and abutting the downstream facing shoulder and the downstream side of the seat having a larger diameter than an upstream side of the seat defining a flange, the flange having an upstream facing shoulder that is spaced apart to form a gap between an upstream wall of the cavity;
- a support shoulder extending at least partly around an interior of the access bore;
- a holder supported on the shoulder, the holder having a central opening and a hinge block;
- an anti-rotation device on the holder to resist rotation of the holder;
- and
- a flapper pivotally secured to the hinge block and movable between an open position, to facilitate fluid flow through the upstream flow passage, and a closed position, to block fluid flow through the upstream flow passage.
A check valve assembly, comprising:
- a body having a central cavity intersected by upstream and downstream flow passages, the upstream passage having a counterbore that defines a downstream facing shoulder;
- a seat having upstream and downstream sides and a central orifice extending therethrough, and an external flange on the downstream side of the seat that is spaced apart from an upstream wall of the cavity by a gap, the upstream side of the seat having a seal and abutting the downstream facing shoulder of the body;
- a support shoulder;
- a fastener extending through a hole in the support shoulder into engagement with the seat to prevent rotation of the seat;
- a holder having a central opening and supported on the support shoulder;
- a straight edge portion extending on the support shoulder and engaged by a corresponding lip on the holder to prevent rotation of the holder;
- and
- a flapper pivotally secured to the at least one hinge block on the holder, the flapper disposed in the cavity for movement between an open position and a closed position for blocking flow through the orifice of the seat.
A holder for a flapper used in a check valve assembly, the check valve assembly comprising a body having a central cavity intersected by upstream and downstream flow passages, a seat disposed proximate and secured to the upstream flow passage by threads, the seat including a downstream side having a larger diameter than the threads and an upstream side of the seat to define a flange having an upstream facing shoulder, a shoulder having a predetermined first width and includes a ledge portion having a width larger than the first width, and a flapper pivotally secured to the holder and movable between an open and closed position to block fluid flow through the upstream flow passage, the holder comprising:
- a lip to facilitate complimentary engagement with the shoulder, wherein a portion of the lip has an increased width to facilitate complementary engagement with the ledge portion to prevent rotational movement of the holder.
A method of assembling a check valve assembly, the valve assembly having a body with a central cavity intersected by upstream and downstream flow passages, the method comprising:
- pivotally securing a flapper to a holder member, the holder member including a lip extending around an outer periphery of the holder member, a portion of the lip having an increased width;
- securing a seat having a central orifice in the upstream flow passage, the seat including a downstream side having a larger diameter than an upstream side of the seat to define a flange having an upstream facing shoulder, wherein the method further comprises positioning the seat such that a gap is formed between the seat and an upstream wall of the cavity;
- inserting the holder member and flapper and positioning the holder member on a shoulder, the shoulder having a predetermined first width and including a ledge portion having a width larger than the first width;
- and
- aligning the lip with the shoulder to facilitate complimentary engagement therewith to prevent rotational movement of the holder member and position the flapper within the central cavity for movement between an open and closed position to facilitate fluid flow therethrough.
Dependencies are inferred from the claim text.