US 12,467,547 B2
Swing check valve
Mousa R. Al-Harbi, Dammam (SA); and Bader M. Al-Jarallah, Dammam (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Oct. 9, 2023, as Appl. No. 18/483,168.
Prior Publication US 2025/0116340 A1, Apr. 10, 2025
Int. Cl. F16K 15/03 (2006.01)
CPC F16K 15/03 (2013.01) 22 Claims
OG exemplary drawing
 
1. A swing check valve, comprising:
a valve body that defines a fluid flow path from a fluid inlet at a first end of the valve body to a fluid outlet at a second end of the valve body opposite the first end;
a flapper coupled to the valve body and moveable between a first position to allow fluid flow in a primary flow direction from the fluid inlet to the fluid outlet through the fluid flow path and a second position to impede or prevent fluid flow in a secondary flow direction from the fluid outlet to the fluid inlet through the fluid flow path;
a seat coupled to or integral with the valve body within the fluid flow path such that the flapper is apart from a face of the seat in the first position and abuts the face of the seat in the second position, the seat comprising a groove formed in the face; and
a dampening ring positioned at least partially within the groove and comprising an interface aligned with the face of the seat such that the flapper abuts the interface in the second position, the dampening ring comprising:
a body formed as a ring and comprising the interface; and
a flexible seal positioned on or at least partially within the body and adjacent an outer radial side wall of the groove and configured to deform at least partially into a space between the body and the outer radial side wall of the groove based on a pressure of the fluid flow in the secondary flow direction between the face of the seat and the body and between the body and the outer radial side wall.