Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1978-12-29
1981-06-23
Cohan, Alan
Fluid handling
Systems
Flow path with serial valves and/or closures
137489, 137492, G05D 1600
Patent
active
042744407
ABSTRACT:
Precision gas pressure regulation is disclosed to provide extreme sensitivity, fast response, and positive shut-off of gases for pressurizing a vessel, such as a tank, pressurized room, chamber, duct, and the like, at pressures up to about 2 inches of water column above atmospheric pressure, and as low as about 0.25 inches of water column, with control of pressure within about 0.02 inches of water column within a predetermined pressure within this range. The system is compact, self-contained, and requires no external source of power other than the supply pressure, which can range from about 10 Psig to 1,000 Psig. Redundant pressure relief devices are provided at all points of pressure reduction within the system for maximum safety. Means are provided to prevent condensate build up in internal components, and for uses in which toxic or corrosive gases are contemplated, a purging option permits unwanted material to be swept out of the apparatus.
REFERENCES:
patent: 843174 (1907-02-01), Reynolds
patent: 1982045 (1934-11-01), Clithero
patent: 2071871 (1937-02-01), Cleveland
patent: 2627703 (1953-02-01), Spencer
patent: 2690760 (1954-10-01), Hughes
patent: 2707970 (1955-05-01), Hughes
patent: 3405551 (1968-10-01), Halasz
Cohan Alan
Jacobson Harvey B.
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