Liquid purification or separation – Flow – fluid pressure or material level – responsive – Discharge of treated material
Patent
1986-04-04
1988-05-10
Fisher, Richard V.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Discharge of treated material
2101952, 2102572, 2103216, 21032172, B01D 1300
Patent
active
047433663
ABSTRACT:
A control valve assembly for use in a reverse osmosis system in which a tank and a pliable barrier are used to define a reservoir having separate confined spaces for purified water and reject water. The barrier when not deformed occupies only a portion of the interior of the tank, and requires a minimum of material to define. The uppermost part of the tank supports a single valve that has a pressurized feed water inlet and outlet, and a movable portion that extends into the interior of the upper interior portion of the tank. Upward movement of the movable portion throttles the rate of flow of pressurized feed water between the inlet and outlet. The barrier in addition of sub-dividing the interior of the reservoir into separate confined spaces of variable volume also serves to physically contact the movable portion and move it upwardly as the first confined space moves towards a last stage in approaching a filled condition to throttle the flow of pressurized feed water through the valve.
REFERENCES:
patent: 3719593 (1973-03-01), Astil
patent: 3831757 (1974-08-01), Gossett et al.
patent: 3887463 (1975-06-01), Bray
patent: 3963612 (1976-06-01), Gossett et al.
patent: 4086166 (1978-04-01), Martin
patent: 4210533 (1980-07-01), Astil
patent: 4595497 (1984-06-01), Burrows
patent: 4604194 (1986-08-01), Entingh
Fisher Richard V.
Jordan Richard D.
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