Fluid-flow control valve

Details Fluid-flow control valve Fluid-flow control valve

1974-04-22

1976-01-27

Cohan, Alan

Valves and valve actuation

Lost motion between actuator and valve

Overload release

251272, F16K 3150

Patent

active

039348148

ABSTRACT:
In a fluid-flow control valve provided with jacking means (which may comprise a nut rotatable on a threaded shaft) operable to move a valve closure member into and out of seating engagement with a valve seat and to exert between the valve closure member and a reaction member, fixed in position relative to the valve seat, a thrust which holds the valve closure member on the valve seat, there is interposed between the jacking means and either the valve closure member or the reaction member a resiliently-deformable thrust-transmitting means (e.g. a pair of Belleville springs); and the jacking means is provided with stop means which limits the extent to which the jacking means can deform the thrust-transmitting means after the valve closure member has seated on the valve seat, thereby limiting said thrust to a safe maximum value dependent on the adjustment of the stop means.

REFERENCES:
patent: 2255929 (1941-09-01), Huston
patent: 2391898 (1946-01-01), Hobbs

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