Leak-proof valve for gas cylinders

Details Leak-proof valve for gas cylinders Leak-proof valve for gas cylinders

1987-06-11

1988-08-16

Michalsky, Gerald A.

Fluid handling

Systems

Flow path with serial valves and/or closures

251 636, 251111, 2511496, 251333, 2513353, F16K 31122

Patent

active

047636904

ABSTRACT:
A safety valve for use with cylinders of noxious gases utilizes a reverse-seat poppet with a bellows seal mechanically coupled between the compound shaft of the poppet valve and the body of the valve, with the bellows and poppet areas sized so that any back pressure on the bellows and the poppet valve are balanced and oppositely directed, the inlet pressure on the valve, as well as the spring beaming of the compound poppet shaft towards the valve cap, tending to keep the valve closed, a manual closer and stem lock keeping the valve closed during transportation and a removable unloader valve being provided to permit passage of gas out of the valve only when the coupling to the gas distribution system is tight and free of leaks.

REFERENCES:
patent: 3608587 (1971-09-01), Zbell
patent: 3831900 (1974-08-01), Matousek et al.
patent: 4214727 (1980-07-01), Baram
patent: 4237920 (1980-12-01), Norman
patent: 4431159 (1984-02-01), Stubbs
patent: 4474358 (1984-10-01), Bennett
patent: 4526341 (1985-07-01), Thomas
patent: 4634099 (1987-01-01), Danko et al.
patent: 4687017 (1987-08-01), Danko et al.

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