초록 ▼

A bellows valve construction which facilitates valve use at elevated temperatures and pressures. The valve includes a valve body having a passageway extending thereinto for defining a valve chamber with a valve seat disposed along this passageway and a fluid inlet and a fluid outlet communicating th

A bellows valve construction which facilitates valve use at elevated temperatures and pressures. The valve includes a valve body having a passageway extending thereinto for defining a valve chamber with a valve seat disposed along this passageway and a fluid inlet and a fluid outlet communicating therewith on opposite sides of the seat. A bonnet is integrally associated with the valve body and includes a bonnet opening coaxial with the valve body passageway. A valve assembly is receivable as a unit in the bonnet opening with a portion thereof extending into the valve chamber for selectively controlling fluid flow between the fluid inlet and outlet. This valve assembly is removable from the valve body as a unit for repair or replacement purposes and includes an adapter nut threadedly receivable in the bonnet opening, a valve member, an elongated stem, and a hollow bellows passing through the bonnet opening in a surrounding relationship with at least a portion of the stem. One end of the bellow is affixed to the adapter nut with the other end being affixed adjacent the valve member such that fluid passing through the valve exerts a compressive force against the bellows. A first urging means is adapted to selectively move the valve stem and member into a valve opened condition and a second urging means is adapted to move the valve stem and member into a valve closed condition. The valve is adapted for either manual or remote operation.

대표청구항 ▼

A bellows valve comprising in combination: a valve body having a cylindrical passageway extending thereinto for defining a valve chamber, a valve seat disposed along said passageway having a fluid inlet communicating therewith on one side of said valve seat and a fluid outlet communicating therewith

A bellows valve comprising in combination: a valve body having a cylindrical passageway extending thereinto for defining a valve chamber, a valve seat disposed along said passageway having a fluid inlet communicating therewith on one side of said valve seat and a fluid outlet communicating therewith on the other side of said valve seat; a bonnet portion associated with said valve body and including a bonnet opening coaxially disposed with said passageway; a valve assembly receivable in said bonnet opening as a unit with a portion thereof extending into said valve chamber and adapted to selectively control fluid flow between said valve inlet and outlet, said valve assembly including an adapter, a valve member, a valve stem and an open ended hollow bellows; said adapter having inner and outer ends and being dimensioned to be closely received in said bonnet opening in a sealing relationship therewith, said adapter including an opening extending therethrough between said adapter inner and outer ends coaxial with said valve chamber; said valve stem extending through said adapter opening and being elongated to have an outer end spaced from said adapter outer end, said stem inner end including said valve member with said valve member being cooperable with said adapter inner end defining a maximum spaced position for said valve member from said valve seat; said bellows passing through at least a portion of said adapter opening and surrounding a portion of said stem, one end of said bellows being affixed to said adapter around said adapter opening adjacent said adapter outer end with the other end of said bellows being affixed to said valve stem adjacent said valve member thereby closing said adaptor opening and sealingly isolating said stem and whereby fluid passing through said valve from said inlet to said outlet exerts an external compressive force against said bellows; first means for at least selectively urging said stem axially outward of said adapter so that said valve member is urged axially outward from said valve chamber away from said valve seat; and, second means for at least selectively urging said stem axially inward of said adapter into said valve chamber for moving said valve member into engagement with said valve seat thereby closing said valve and preventing fluid flow therethrough.