Patent ID: 6123319
Filing Date: 2000-09-26
Classification: F16K

Abstract:
A damper valve for controlling the flow of fluids through a conduit, comprising:a base;a valve element having sealing portions, a periphery and a central plane extending through the periphery; andtwo valve seats arranged serially with respect to the flow of the fluids, said valve seats defining seals with said valve element, at least one of said valve seats being an adjustable valve seat including a stationary member and an adjustable element mounted for movement relative to said stationary member,wherein said valve element is mounted on said base for pivoting movement into a closed position in which said sealing portions of said valve element are in sealing engagement with said valve seats,wherein the base, the valve element, and the valve seats define a chamber, and the damper valve further comprises gas in said chamber at a pressure greater than the pressure of the fluids in the conduit, andwherein said valve element is mounted on said base for pivoting movement by a shaft, said chamber intersects with said shaft, and a closure seat on said stationary member engages the shaft to form a seal with the shaft.