Valve for low pressure high temperature applications

Details Valve for low pressure high temperature applications Valve for low pressure high temperature applications

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 1/22 (2006.01)

Patent

CA 2054610

ABSTRACT OF THE DISCLOSURE A butterfly valve apparatus includes a valve body having an interior wall defining a generally cylindrical passageway having a centerline. A shaft having a centerline extends generally diametrically through the valve body. The shaft is carried by the valve body to permit rotation with respect to the body. A valve disc is mounted on the shaft in onset relationship fro n the centerline of the shaft. The disc is movable between an open position in which the disc is aligned with the centerline of the passageway and a closed position in which the disc is disposed in perpendicular relationship to the centerline of the passageway. A flexible metallic seal has a generally cylindrical for n and has first and second axial extremities. The first axial extremity is carried on the wall of the passageway in the housing. The disc engages the second axial extremity of the flexible metallic seal in the closed position. In many embodiments of the invention the periphery of the valve disc has clearance with respect to the passageway in the valve body.

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