F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/54
F16K 5/00 (2006.01) F16K 5/20 (2006.01)
Patent
CA 1063086
ABSTRACT OF THE DISCLOSURE A ball valve comprises a body provided with a flow channel and a ball-shaped closure rotatably mounted in the valve body. The closure has spindles mounted on both sides and perpendicular to the longitudinal axis of the flow passage. One spindle extends through the wall of the valve through a sealed socket. Sealing rings are fitted into ring-shaped trans- verse grooves in the valve body on both sides of the closure. A key joint between the closure and the regulating spindle is formed so that the end of the regulating spindle facing the closure narrows in wedge-like fashion there being a corresponding V-groove in the closure. The regulating spindle is arranged to be movable lengthwise in relation to the closure, so that the key joint can provide a completely tight connection, or a connection where a sufficiently large clearance exists so as to permit tipping of the closure, due to the action of the pressure of the pressure medium against the sealing rings at the outlet end of the valve, about the spindle situated on the opposite side of the closure. By moving the regulating spindle to- wards the closure, the latter can be turned from tipped position towards a position where the closure spindles are at right angles to the longitudinal axis of the flow passage of the valve, and where the torque required for turning the closure to a desired position is low.
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