Valves and valve actuation – With means to increase head and seat contact pressure – Gate valve
Patent
1992-02-11
1993-08-17
Fox, John C.
Valves and valve actuation
With means to increase head and seat contact pressure
Gate valve
251193, F16K 312
Patent
active
052363457
ABSTRACT:
An expanding gate valve assembly comprising a gate, a stem for actuating the gate and floating segments movably mounted on opposite sides of the gate for movement relative to valve seats on a valve body. The valve seats on the valve body are inclined to the axis of the stem, and the segments are provided with correspondingly matching inclined surfaces. Movement of the segments is arrested by stops on the valve body, thereby making the segments expand laterally during closure The gate has a lower gate part having a through conduit which is alignable with a fluid flow passageway in the valve body in the open position, such lower gate part having tapered surfaces parallel to the incline of the valve seats to seal therewith and establish fluid tight communication between the through conduit of the gate and the fluid flow passageway.
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Fox John C.
McCarthy Bill D.
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