Fluid control valve and system with leak detection and containme

Details Fluid control valve and system with leak detection and containme Fluid control valve and system with leak detection and containme

1989-06-15

1990-02-20

Walton, George L.

Fluid handling

With leakage or drip collecting

73 40, 73 405R, 73 46, 251331, 340605, G01M 308, G01M 338, F16K 3700, F16K 5100

Patent

active

049017519

ABSTRACT:
A fluid control valve with leak detection and containment features for use in a fluid handling system incorporating one or more flow controlling devices each including: an actuator; a weir valve and associated valve housing; and a pair of spaced apart diaphragms, one of which serves as the closure member for the weir valve and the other providing a secondary seal defining the limits of a containment chamber for at once preventing contamination of the controlled fluid, protecting the actuating mechanism and allowing immediate detection of valve closure failure. A piston member disposed within the chamber is coupled to the two diaphragms, and a fluid detection device is disposed in communication with a sealed containment chamber formed between the two diaphragms. The system includes electronic control apparatus responsive to the detection device and is operative to instantaneously shut down the system in the event of a detected failure.

REFERENCES:
patent: 2691773 (1954-10-01), Lichtenberger
patent: 3148861 (1964-09-01), McFarland, Jr.
patent: 3154286 (1964-10-01), McFarland, Jr.
patent: 3472062 (1969-10-01), Owen
patent: 3623700 (1971-11-01), Boteler
patent: 3838707 (1974-10-01), Wachowitz, Jr.
patent: 4010769 (1977-03-01), De Lorenzo et al.
patent: 4386269 (1983-05-01), Murphy
patent: 4794940 (1989-01-01), Albert et al.

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