Improvements in or relating to fluid control valves.

摘要

A fluid control valve assembly has a body (1) having a cavity connected via an inlet port and an outlet port with an input line and an output line respectively. A plug (4) is located within the body cavity and has a through passage affording a flow path betweeen the inlet and the outlet port when the plug (4) is set in the open position of the valve. At least one of the ports is surrounded by a seating recess and a seat member (27) is located in the seating recess and has a sealing surface adapted to engage the surface of the plug (4) and form sealing contact therewith. A radial spring washer (26) backs the radial outer surface of the seat member (27) and a bearing ring (25) supports the outer margin of the spring washer (26) out of contact with the radial wall of the seating recess.