초록 ▼

A check valve apparatus provides an overall valve body which can be placed in any typical flow line, a removable seat being provided at the inner portion of the valve body, the seat having a center orifice through which fluids can flow. The seat can be attached using a plurality of temporary tensile

A check valve apparatus provides an overall valve body which can be placed in any typical flow line, a removable seat being provided at the inner portion of the valve body, the seat having a center orifice through which fluids can flow. The seat can be attached using a plurality of temporary tensile connectors, and the seat having a recess which receives a valving member therein. The valving member pivots in the seat and is weighted to a degree which aids in closure under static flow conditions. A closure spring can be added to further insure closure of the valve when desirable. In the preferred embodiment, the valving member pivots in the valve seat a distance less than ninety degrees, thus insuring valve closure during back flow conditions, the valving member projecting at least some degree into the line of flow of the fluid stream.

대표청구항 ▼

A pipeline check valve, comprising: a. a valve body provided with a recess, said valve body having a flow opening therethrough communicating with said recess; b. a removable valve seat, said valve seat provided with a fluid opening therethrough, said valve seat corresponding to said recess and being

A pipeline check valve, comprising: a. a valve body provided with a recess, said valve body having a flow opening therethrough communicating with said recess; b. a removable valve seat, said valve seat provided with a fluid opening therethrough, said valve seat corresponding to said recess and being attachable to said valve body within said recess with said flow opening of said body and said fluid opening of said seat aligning to allow fluid flow through said aligned openings; c. a valving member in operative connection with said valve seat, said valving member being capable of effecting a substantially fluid tight seal with said fluid opening in said valve seat when fluid flows through said opening of said valve seat in a backflow direction; and d. temporary attachment means for securing said removable valve seat to said valve body, said attachment means comprising: i. a plurality of openings in said valve seat; ii. a corresponding plurality of aligning openings in said valve body; iii. at least one mounting bolt inserted through said aligned openings connecting said valve seat with said valve body; and iv. a retainer member being entirely attached during operation to said removable valve seat on the downstream face side thereof, with said valving member occupying a pivotal position during operation between said retainer member and said valve seat, said retainer providing a plurality of openings corresponding to and aligning during operation with said plurality of openings provided in said valve body and through said valve seat.