Valve with remote and manual actuation means

Details Valve with remote and manual actuation means Valve with remote and manual actuation means

F - Mech Eng,Light,Heat,Weapons

16

K

251/4

F16K 31/143 (2006.01) F16K 31/122 (2006.01)

Patent

CA 1260907

VALVE WITH REMOTE AND MANUAL ACTUATION MEANS ABSTRACT OF THE DISCLOSURE An actuator for moving the stem (9) of a gate valve or the like is provided with hydraulic means (15,17) for driving the stem (9) axially inward and a volute spring (7) for returning the stem axially outward upon loss or other removal of the control hydraulic pressure. A ball screw (49) and ball nut (54) assembly rotatable by a disengageable drive shaft (63) is operable to manually drive the stem (9) inward during periods of insufficient control pressure.

501449

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