Fluid handling – Self-proportioning or correlating systems – Mixture condition maintaining or sensing
Patent
1978-07-21
1980-11-11
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Mixture condition maintaining or sensing
210 961, 261 64B, 261 76, G05D 1108
Patent
active
042327008
ABSTRACT:
A metering device for determining and controlling the content of a gas in a liquid, e.g. chlorine gas in water, comprises a pilot-operated check valve in a gas feed line, inserted between a vacuum diaphragm valve and an ejector. The metering device also comprises a concentration meter located on a main, a liquid flow meter, an electronic gas-to-liquid ratio setter correction controller coupled to a device for setting the concentration of the gas in the liquid, coupled to the concentration meter and coupled, via an actuating mechanism, to the gas-to-liquid ratio setter. Connected to the latter is an electronic gas-to-liquid flow ratio controller associated with signal distributors and an actuating mechanism of a gas flow controller. The invention permits the accuracy of metering a gas in a liquid, e.g. chlorine gas in drinking water, to be substantially enhanced, whereby the quality of drinking water is considerably improved.
REFERENCES:
patent: 2957494 (1960-10-01), Stenberg
patent: 3528545 (1970-09-01), Frazel
patent: 3826905 (1974-07-01), Valkama
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