초록 ▼

A wafer style butterfly valve has a valve body including a through opening with a cylindrical wall coaxially surrounding an end portion of the fluid passage. The insert is retained within the valve body by one or more resilient wire forms held in an annular channel defined by facing annular grooves

A wafer style butterfly valve has a valve body including a through opening with a cylindrical wall coaxially surrounding an end portion of the fluid passage. The insert is retained within the valve body by one or more resilient wire forms held in an annular channel defined by facing annular grooves in the valve body wall and the insert peripheral wall. The wire forms have circular sections while the insert groove has a semi-circular section, thereby providing a self-centering and self-locking effect. A tapered wall at one end of the insert provides expansion for the wire form during insertion of the insert into the valve body.

대표청구항 ▼

A wafer style butterfly valve comprising: a valve body having a through opening forming a fluid flow passage and having a wall coaxially surrounding an end portion of said fluid flow passage; a first annular groove in a surface of said wall; an insert having a peripheral surface shaped and sized suc

A wafer style butterfly valve comprising: a valve body having a through opening forming a fluid flow passage and having a wall coaxially surrounding an end portion of said fluid flow passage; a first annular groove in a surface of said wall; an insert having a peripheral surface shaped and sized such that said peripheral surface closely faces said wall surface when said insert is positioned within said through opening, said insert including a second annular groove having a semi-circular section and positioned in facing opposition to said first groove when said insert is positioned within said through opening, wherein said first and second grooves define an annular channel; at least a first and second elastic wire form, each of said wire forms having an arcuate section defined by a plurality of interconnected straight sections in an undeformed state wherein each of said wire forms include first and second respective portions disposed in said first and second grooves when said insert is positioned within said through opening so as to retain said insert within said through opening.