Pilot operated diaphragm valve

Details Pilot operated diaphragm valve Pilot operated diaphragm valve

1976-11-01

1979-01-23

Rosenthal, Arnold

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 46, 251 42, F16K 31385, F16K 3140

Patent

active

041356969

ABSTRACT:
A pilot type diaphragm valve assembly is provided which includes a solenoid-operated pilot valve which may be opened to remove fluid pressure from a chamber in the valve housing causing the main valve to open, and which may be closed to cause a buildup of hydraulic pressure in the valve housing causing the main valve to close. The solenoid-operated pilot valve includes an outlet which may be coupled to a reservoir at atmospheric pressure, or to any other suitable receptacle, to make the pressure differential across the diaphragm within the valve independent of pressure differentials in the fluid flow through the valve so as to obviate instability at low flow rates.

REFERENCES:
patent: 202653 (1878-04-01), Hogan
patent: 1055161 (1913-03-01), Geissinger
patent: 1114431 (1914-10-01), Bopp
patent: 3367621 (1968-02-01), Griswold
patent: 3799496 (1974-03-01), Esten
patent: 3967808 (1976-07-01), Lieding

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