Pressure control valve

Details Pressure control valve Pressure control valve

1982-08-19

1985-09-10

Schwadron, Martin P.

Fluid handling

Line condition change responsive valves

Direct response valves

137529, 13762565, F16K 1706

Patent

active

045400180

ABSTRACT:
The pressure response of a pressure control valve is adjusted by a solenoid valve of which the solenoid is connected to an electrical three point control device. A programmed signal and an actual signal derived from a transformer of the control pressure valve are fed to the input of the three point control device.

REFERENCES:
patent: 1308165 (1919-07-01), Clark
patent: 1518894 (1924-12-01), Bliss
patent: 1777611 (1930-10-01), Grohek
patent: 2179003 (1939-11-01), Allen
patent: 2436992 (1948-03-01), Ernst
patent: 2944564 (1960-07-01), Pettey, Jr.
patent: 3017897 (1962-01-01), Sequenot
patent: 3714953 (1973-02-01), Solvang
patent: 3774641 (1973-11-01), Mimdner et al.
patent: 4106522 (1978-08-01), Manesse
patent: 4133511 (1979-01-01), Hartmann et al.
patent: 4253480 (1981-03-01), Kessel et al.
patent: 4312380 (1982-01-01), Leiber et al.

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