Safety pressure relief valve

Details Safety pressure relief valve Safety pressure relief valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/39

F16K 17/00 (2006.01) F16K 17/10 (2006.01) F16K 31/363 (2006.01)

Patent

CA 1189420

ABSTRACT An improved safety pressure relief valve which is particu- larly applicable to valves utilizing pressure taps for sensing the pressure within the inlet nozzle, such as pilot operated valves. The valve includes a valve body having an inlet opening into which a full nozzle is inserted. An annular port surrounds the peri- phery of the nozzle. An opening in the nozzle leading to the annular port provides for the insertion of a pitot or dipper tube therein. The valve body includes a channel leading between the annular port and an external tap for the pressure sensing line connected to the pilot control means. The design permits the nozzle to be rotated to any angular position with respect to the valve body, thus permitting ready assembly and disassembly of the valve. In a second embodiment, an annular port is used to permit direct injection of purging fluid into the nozzle to prevent its clogging. -15-

423325

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