Gas valve capable of modulating or on/off operation

Details Gas valve capable of modulating or on/off operation Gas valve capable of modulating or on/off operation

1991-12-31

1993-06-01

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

137495, F16K 3140

Patent

active

052151158

ABSTRACT:
A gas valve having a main valve closure member carried by a first diaphragm biased to close the main valve, the first diaphragm being exposed on opposite sides to gas supply pressure and to pressure in a control chamber. The control chamber is connected to the main valve outlet through a normally closed control valve, whose position is primarily determined by an electromagnetic voice coil, in series with a normally open control valve, whose position is primarily determined by a second diaphragm exposed to the valve outlet pressure.

REFERENCES:
patent: 3447775 (1969-06-01), Katchka et al.
patent: 3502101 (1970-03-01), Willson et al.
patent: 3545472 (1970-12-01), Franz
patent: 3592225 (1971-07-01), Graham et al.
patent: 3796229 (1974-03-01), Wright
patent: 4217928 (1980-08-01), Kelly

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