Patent ID: 7416164
Filing Date: 2008-08-26
Classification: F16K,Y10T

Abstract:
1. A valve having reduced seal wear and reduced friction comprising: a valve body having an inlet and an outlet forming a passage in the valve body, and a reverse-flow side recess; a valve stem extending into the valve body; a disc rotatable by the valve stem to open and close the passage, the disc having a perimeter; a valve seal having an elliptical first shape with a major axis greater than a minor axis, the valve seal deforming through contact with the disc as the disc rotates to a closed position to a second shape different from the first shape in which the valve seal substantially contacts the disc perimeter, thereby to substantially close the passage, wherein the valve seal is formed of a resilient material that substantially returns to the first shape when the disc subsequently moves back toward an open position, wherein the valve seal includes a peripheral portion; and a press-fit seal retainer in an interference fit with the reverse-flow side rccess, the peripheral portion of the valve seal received in a complementary receiving portion of the press-fit seal retainer.