초록 ▼

A ball valve is disclosed having an improved seat ring particularly adapted for sealing a ball member in an end-loaded or top-loaded valve body. The ball is mounted for selective rotation and limited axial movement in a valve body passageway. The seat rings are disposed on diametrically opposite sid

A ball valve is disclosed having an improved seat ring particularly adapted for sealing a ball member in an end-loaded or top-loaded valve body. The ball is mounted for selective rotation and limited axial movement in a valve body passageway. The seat rings are disposed on diametrically opposite sides of the ball about valve inlet and outlet openings. Frusto-conical disc springs interposed between each seat ring and an associated valve body shoulder urge the seat rings into engagement with the ball. A rigid reinforcing ring is disposed intermediate of the flexible seat ring for integral movement with the seat ring and for reinforcing the seat ring against collapse under pressure. The reinforcing ring is received in an annular channel about the periphery of the seat ring and preferably comprises a split metal ring in a stressed and expanded condition.

대표청구항 ▼

A ball valve comprising: a body having a central passageway; a ball member including a fluid flow opening therethrough, said ball member being positioned in said passageway and mounted for selective rotation between valve open and closed positions to control fluid flow through said valve; a pair of

A ball valve comprising: a body having a central passageway; a ball member including a fluid flow opening therethrough, said ball member being positioned in said passageway and mounted for selective rotation between valve open and closed positions to control fluid flow through said valve; a pair of radially inward extending shoulders in said passageway oppositely disposed of said ball member; and, a pair of composite seat member assemblies positioned axially in said passageway oppositely disposed of said ball member for fluid sealing engagement with said ball member, each of said pair comprising: a seat ring adapted for elastic flexure generally toward and away from said ball member and including a central opening, a shoulder facing surface generally facing an associated one of said shoulders, a ball engaging surface contoured for fluid sealing engagement with said ball member, and an outer peripheral wall having an annular channel; a disc spring having a central opening and a generally frusto-conical configuration in an unstressed condition interposed between said seat ring and said associated one of said shoulders for continuously urging said ball engaging surface toward engagement with said ball member; and, a reinforcing ring means received in said annular channel whereby said reinforcing ring reinforces the seat ring against collapse under pressure.