Patent ID: 8978695
Filing Date: 2015-03-17
Classification: F16K,Y10T

Abstract:
1. 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.