Modulating flow control valve

Details Modulating flow control valve Modulating flow control valve

1975-03-03

1977-04-26

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

G05D 1100

Patent

active

040195279

ABSTRACT:
The preferred embodiment of the invention disclosed herein includes a main check valve responsive to the rate of flow of fluid to a demand system and a bypass valve metering the flow of fluid to a bypass system. In the closed position of the main check valve, the bypass valve is in a fully open position whereby a predetermined minimum flow from a pressure source is maintained; in an intermediate position of the main check valve responsive to the predetermined minimum rate of flow thereacross, the bypass valve is closed and remains closed from the intermediate position of the main check valve to the fully open position. Operation of the bypass valve is controlled by fluid pressure from the inlet side of the main check valve which acts on a piston associated with the bypass valve and the buildup of pressure is controlled by a pilot valve.

REFERENCES:
patent: 2445544 (1948-07-01), Trautman
patent: 3007481 (1961-11-01), Frost
patent: 3068882 (1962-12-01), Odendahl
patent: 3318321 (1967-05-01), Odendahl
patent: 3604446 (1971-09-01), Brooks
patent: 3640359 (1972-02-01), Clark et al.
patent: 3723025 (1973-03-01), Coakley

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