Gas regulator valve with step opening characteristic

Details Gas regulator valve with step opening characteristic Gas regulator valve with step opening characteristic

1979-10-18

1981-03-10

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

137495, F16K 31365

Patent

active

042547962

ABSTRACT:
There is disclosed a fast-resetting, step-opening gas regulator valve of the diaphragm pressure controlled operation which has an internal bleed cavity and a bleed passageway communicating through a snap-acting valve responsive to a heating demand electromagnet and a spring-biased regulator valve that responds to the outlet pressure. The valve structure has a step opening characteristic which is provided by a balancing of pressures and regulator valve spring force in which the development of gas pressure behind a diaphragm controlling the step opening operation is limited by a flow-restricting orifice. The flow restricting orifice initially provides a low gas pressure and, within a constant and relatively short time interval thereafter, an increased gas pressure to the step opening diaphragm, to provide an initial partial and subsequent full opening of the main gas valve. The fast-resetting of the gas regulator valve is provided by the restricted orifice valve which permits unrestricted, reverse gas flow to relieve the actuating gas pressure on the diaphragm controlling the step opening operation.

REFERENCES:
patent: 3513873 (1970-05-01), Graham
patent: 3552430 (1971-01-01), Love
patent: 3685732 (1972-08-01), Haskins
patent: 3721263 (1973-03-01), Visos

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