Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1980-04-08
1982-10-05
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
137451, 251 28, 251 46, 251122, F16K 3118
Patent
active
043523714
ABSTRACT:
A float operated valve for controlling the rate of flow of water from a pipe carrying water under pressure, to a vessel, comprises a pipe having an end opening of selected diameter and a flange of larger diameter surrounding the pipe. A flexible diaphragm is attached over the flange having a central closure pad adapted to cut off water flow when pressed against the pipe. A small orifice is drilled through the diaphragm so that when the flow is shut off, water can still flow through the orifice to the second side of the diaphragm. A second short pipe having a similar flange is bolted against the diaphragm to the first flange, to provide a water tight seal. There is a second small orifice in the second end of the second pipe, and a float mechanism is provided with a closure tip to close the second orifice when the water level is at a selected value. The closure tip provided can vary the size of the second orifice so that as soon as it is opened, the orifice size is a minimum. As the water level drops, the tip moves farther away and the orifice is enlarged. Depending on the ratio of areas of the first and second orifices, water pressure on the second side of the diaphragm prevents flow. When the second orifice reaches a selected area the diaphragm is no longer pressed against the first pipe, and a high flow of water is provided.
REFERENCES:
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patent: 3574310 (1971-04-01), Souriau
patent: 3690344 (1972-09-01), Brumm
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patent: 4198029 (1980-04-01), Johnson
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