F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
74/1, 137/80
F16K 11/00 (2006.01) F01D 21/18 (2006.01)
Patent
CA 1044044
ABSTRACT OF THE DISCLOSURE An emergency trip device for applying pilot pressure to a pressure sensitive device during a resetting mode and for rapidly relieving pilot pressure from the pressure sensitive device during a tripping mode comprises a multivalve housing including a reservoir arranged for communication with the pressure sensitive device, an inlet flow cut-off valve operatively connected to the reservoir for controlling the flow of fluid to the reservoir and a disc-dump valve operatively connected to the reservoir for the rapid draining thereof. Pilot fluid is supplied to the emergency trip device through fluid supply conduits and drained from the device through drain passages. A trip valve is employed to provide fluid communication between the fluid supply conduits and a dump chamber employed in the disc-dump valve for the draining of the chamber to effect the opening of the disc-dump valve causing loss of pilot pressure to the pressure sensitive device during the tripping mode. The trip valve and disc-dump valve are held closed in face sealing arrangements obviating any tendency of these valves to stick during the tripping mode due to foreign matter present in the pilot fluid.
255009
Devlin Charles L.
Eggenberger Markus A.
LandOfFree
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