Valve assembly for packing fluid under pressure and packing prov

Details Valve assembly for packing fluid under pressure and packing prov Valve assembly for packing fluid under pressure and packing prov

1990-05-29

1991-05-28

Fox, John C.

Fluid handling

Systems

Flow path with serial valves and/or closures

222147, 141 18, F16K 5100

Patent

active

050185527

ABSTRACT:
The valve assembly for non-returnable packing comprises a valve housing including a main valve and an auxiliary valve the latter being initially kept in opened position through a resilient locking device which is unlocked, at the end of a first filling through a displacement of the main valve beyond its position of normal opening under the action of a long travel filling tap. The auxiliary valve is then forced to rest on its seat by means of a spring with low calibration. Any depression caused by tapping would provoke the opening of the auxiliary valve, while any overpressure resulting from filling would hit the auxiliary valve in a closed position.

REFERENCES:
patent: 2019251 (1935-10-01), Cooke
patent: 2626723 (1953-01-01), Omorats
patent: 2828054 (1958-03-01), Cliarmonte

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