Pilot valve operator for safety relief valve

Details Pilot valve operator for safety relief valve Pilot valve operator for safety relief valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/39.1

F16K 17/32 (2006.01) F16K 17/10 (2006.01) F16K 31/12 (2006.01)

Patent

CA 1039616

PILOT VALVE OPERATOR FOR SAFETY RELIEF VALVE Abstract of the Disclosure A pilot valve for controlling main valve operation to relieve overpressure from a fluid system to which the main valve is connected. Opening and closing of the pilot valve is effected by a movable disc which carries with it an annular resilient gas- ket. A seating surface, defined on the end face of the inlet nozzle, cooperates with the gasket when the disc is in closed position for effecting a pressure tight seal against fluid flow to the discharge side of the valve. A perforated gasket retainer communicates exposure of upstream pressure to directly against the formed seal whereby at incipient lift of the disc initial flow discharge incurs minimum pressure drop therepast. A two- stage huddle chamber surrounding the seal area is capable of re- sponding to the fluid pressure of even initial discharge to accelerate full lift opening of the disc.

227767

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