Fluid handling – Processes
Patent
1999-08-12
2000-10-17
Huson, Gregory L.
Fluid handling
Processes
137 67, 137 6813, 251327, 251 64, F16K 1714
Patent
active
06131594&
ABSTRACT:
An isolation gate valve (10, 10a, 10b, 124, 146, 210) is provided which has a valve body (12, 126, 212) presenting a passageway (14, 214) therethrough; a shiftable, apertured gate member (18, 224) is located within the body (12, 126, 212) and is shiftable between a valve open position permitting flow through the passageway (14, 214) and a valve closed position wherein the member (18, 224) is shifted into a flow-blocking relationship relative to the passageway (14, 214). A valve actuator (20, 130, 220) is provided which includes a gas-generating cartridge unit (22, 22a, 22b, 222) which, upon actuation, generates a charge of high pressure subsonic gas for shifting the gate member (18, 224) at a velocity of about 0.2 to about 0.33 in./msec. Preferably, the actuator includes a piston housing (56, 56a, 56b, 256) having a piston (72, 72a, 72b, 272) therein with a piston rod (71, 71a, 71b, 271) coupled between the piston (72, 72a, 72b, 272) and the gate member (18, 224). In the valve open position, the piston (72, 72a, 72b, 272) is adjacent the cartridge unit (22, 22a, 22b, 222) and is oriented so that the pressurized gas from the cartridge unit (22, 22a, 22b, 222) shifts the piston (72, 72a, 72b, 272) thereby closing the valve (10, 10a, 10b, 124, 146, 212). A dampener unit (99, 299) is provided in a association with the gate member (18, 224) to effect predetermined, controlled deceleration thereof as the gate member approaches its fully actuated position.
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Going John E.
Staggs William A.
Fike Corporation
Huson Gregory L.
Kim Joanne Y.
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