Fiber-reinforced polymer (FRP) valve body with a polymeric liner and method of manufacturing same

摘要

A lined ball valve includes a preformed polymeric liner having a flow passage therethrough. The flow passage has a valve stem opening transverse to the flow direction. A ball element with a flow opening therethrough is rotatably mounted in the flow passage. A valve stem is connected to the ball element. A body of fiber-reinforced polymer is molded around the preformed liner. A method for manufacturing a lined valve includes the steps of: (a) injection molding a polymeric preformed liner; (b) supporting the preformed polymeric liner inside a body mold; and (c) compression molding a fiber reinforced resin valve body around the preformed liner.