Clapper check valve with a valve seat seal member

Patent metadata

Field	Value
Publication number	US-11512781-B2
Application number	US-201917291606-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	Nov 8, 2018
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A valve assembly includes a valve body that defines an internal flow passageway between an inlet and an outlet, and a valve seat disposed in the valve body with a sealing surface perpendicular to the flow passageway. The valve assembly further includes a clapper pivotally correlated to the valve seat having a closed configuration extending across the valve seat configured to substantially close off the flow passageway, and an open configuration configured to substantially allow fluid flow in the flow passageway from the inlet to the outlet through the valve body. An annular valve seat seal is disposed within an annular groove formed in a surface of the valve seat, where the annular valve seat seal is disposed at an interface between the valve seat and the clapper when the clapper is in the closed configuration.

First claim

What is claimed is:

1. A valve assembly comprising:
a valve body defining an internal flow passageway between an inlet and an outlet;
a valve seat disposed in the valve body and including a sealing surface that is perpendicular to a longitudinal axis of the internal flow passageway;
a clapper pivotally correlated to the valve seat between a closed configuration and an open configuration, wherein
when the clapper is in the closed configuration, the clapper extends across the valve seat and is configured to substantially close off the internal flow passageway, and
when the clapper is in the open configuration, the clapper is configured to substantially allow fluid flow in the internal flow passageway from the inlet to the outlet through the valve body;

an annular valve seat seal disposed within an annular groove formed in the sealing surface of the valve seat, the annular valve seat seal being disposed at an interface between the valve seat and the clapper when the clapper is in the closed configuration; and
an annular clapper seal disposed at an interface between a first clapper component of the clapper and a second clapper component of the clapper, the annular clapper seal being spaced apart from the annular valve seat seal when the clapper is in the closed configuration.

2. The valve assembly of claim 1 , wherein the annular valve seat seal comprises a circular cross-section and the annular groove comprises a circular cross-section with a dovetail groove extension.

3. The valve assembly of claim 1 , wherein the annular clapper seal is a first annular clapper seal; and
wherein the valve assembly further comprises a second annular clapper seal bonded to the clapper and being disposed at an interface between the valve seat and the clapper when the clapper is in the closed configuration.

4. The valve assembly of claim 1 , wherein the annular clapper seal is a first annular clapper seal; and
wherein the valve assembly further comprises a second annular clapper seal bonded to a corner edge of the clapper and being disposed at an interface between the valve seat and the clapper substantially concentric and proximate to the annular valve seat seal when the clapper is in the closed configuration.

5. The valve assembly of claim 1 , wherein the annular valve seat seal includes at least one material selected from the group consisting of a deformable thermoplastic material, a polyurethane material, a fiber-reinforced material, carbon, glass, cotton, wire fibers, and cloth.

6. The valve assembly of claim 1 , wherein the annular clapper seal includes at least one material selected from the group consisting of a deformable thermoplastic material, a polyurethane material, a fiber-reinforced material, carbon, glass, cotton, wire fibers, and cloth.

7. The valve assembly of claim 1 ,
wherein the first clapper component forms a base of the clapper and pivotally secures the clapper to the valve seat; and
wherein the second clapper component is coupled to the first clapper component and forms a surface area that contacts the valve seat when the clapper is in the closed configuration.

8. The valve assembly of claim 1 , wherein the sealing surface of the valve seat faces away from the inlet of the valve body.

9. A clapper valve assembly comprising:
a valve body defining an internal flow passageway between an inlet and an outlet;
a valve seat disposed in the valve body and including a sealing surface faces toward the outlet and away from the inlet;
a clapper pivotally correlated to the valve seat between a closed configuration and an open configuration, wherein
when the clapper is in the closed configuration, the clapper extends across the valve seat and is configured to substantially close off the internal flow passageway, and
when the clapper is in the open configuration, the clapper is configured to substantially allow fluid flow in the internal flow passageway from the inlet to the outlet through the valve body;

an annular valve seat seal disposed within an annular groove formed in the sealing surface of the valve seat, the annular valve seat seal being disposed at an interface between the clapper and the valve seat when the clapper is in the closed configuration; and
an annular clapper seal disposed at an interface between a first clapper component of the clapper and a second clapper component of the clapper, the annular clapper seal being spaced apart from the annular valve seat seal when the clapper is in the closed configuration.

10. The clapper valve assembly of claim 9 , wherein the annular groove comprises a circular cross-section with a dovetail groove extension.

11. The clapper valve assembly of claim 9 , wherein the annular clapper seal is a first annular clapper seal; and
wherein the clapper valve assembly further comprises a second annular clapper seal bonded to a surface of the clapper, wherein
when the clapper is in the open configuration, the surface of the clapper is parallel to a longitudinal axis of the internal flow passageway, and
when the clapper is in the closed configuration, the second annular clapper seal is disposed at an interface between the clapper and the valve seat.

12. The clapper valve assembly of claim 9 , wherein the annular valve seat seal includes at least one material selected from the group consisting of a deformable thermoplastic material, a polyurethane material, a fiber-reinforced material, carbon, glass, cotton, wire fibers, and cloth.

13. The clapper valve assembly of claim 9 , wherein the annular clapper seal includes at least one material selected from the group consisting of a deformable thermoplastic material, a polyurethane material, a fiber-reinforced material, carbon, glass, cotton, wire fibers, and cloth.

14. The clapper valve assembly of claim 9 ,
wherein the first clapper component forms a base of the clapper and pivotally secures the clapper to the valve seat; and
wherein the second clapper component is coupled to the first clapper component and forms a surface area that contacts the valve seat when the clapper is in the closed configuration.

15. The clapper valve assembly of claim 9 , wherein the sealing surface of the valve seat is substantially perpendicular to a longitudinal axis of the internal flow passageway.

16. A valve assembly comprising:
a valve body defining an internal region in fluid communication with an inlet and an outlet;
a valve seat disposed in the valve body;
an annular groove defined in the valve seat in a surface facing toward the outlet and away from the inlet;
an annular valve seat seal disposed within the annular groove;
a clapper pivotally actuable between a closed configuration and an open configuration, wherein
when the clapper is in the closed configuration, the annular valve seat seal is sealingly engaged with the clapper to restrict fluid flow through the internal region, and
when the clapper is in the open configuration, fluid flow is permitted through the internal region; and

an annular clapper seal bonded to a corner edge of the clapper and being disposed at an interface between the valve seat and the clapper when the clapper is in the closed configuration,
wherein, when the clapper is in the closed configuration, the annular clapper seal is spaced apart from each of the annular valve seat seal and an outer edge of the surface of the valve seat.

17. The valve assembly of claim 16 , wherein the annular groove comprises a circular cross-section with a triangular-shaped dovetail groove extension.

18. The valve assembly of claim 16 , wherein the a

Assignees

• Spm Oil & Gas Inc

Inventors

• Witkowski Brian C

Classifications

• F16K1/42

  Valve seats (for double-seat valves F16K1/44) · CPC title

• F16K1/2042

  Special features or arrangements of the sealing · CPC title

• F16K15/034 Primary

  weight-loaded · CPC title

• E21B2200/05

  Flapper valves · CPC title

• F16K1/2057 Primary

  the sealing being arranged on the valve seat · CPC title