Patent ID: 6565065
Filing Date: 2003-05-20
Classification: F16K

Abstract:
A valve adaptor for use with a disc valve arrangement including a housing having a valve seat in communication with a cylindrical bore in which a valve stem is located for axial displacement of the valve arrangement, the housing including a first abutment element in the bore, the adaptor comprising:a shank; a first relatively rigid incompressible valve member secured to the shank for selectively engaging the valve seat to form a first seal in a closed state; a second resilient valve member movably attached to the shank and having opposite sides for compressively distorting in response to an applied load to form a second seal with said bore; at least one resilient member coupled to and between the first and second valve members; a second abutment element on a side of the second valve member opposite the at least one resilient member for abutting the housing first abutment element and for limiting the displacement of the second valve member in the bore as the first valve member and shank are displaced to the closed state such that the displacement of the first valve member to the closed state displaces the first valve member relative to the second valve member and compresses said at least one resilient member to apply said load to the second valve member prior to the closing of the first valve member; and an attachment member for securing the shank to the stem.