Reverse osmosis water purification system with improved pressure

Details Reverse osmosis water purification system with improved pressure Reverse osmosis water purification system with improved pressure

1988-09-26

1989-11-14

Fisher, Richard V.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Fluid pressure responsive by-pass

210136, 2102572, 21032165, 21032183, 251 612, B01D 1300

Patent

active

048805343

ABSTRACT:
An improved pressure relief valve is provided in a reverse osmosis water purification system to prevent the pressure of produced purified water from exceeding a predetermined pressure limit. In the water purification system, ordinary tap or feed water is supplied to a reverse osmosis module which produces a purified water supply coupled for flow to a pressurized storage reservoir to await dispensing, and a reject water supply coupled through a backpressuring restrictor for flow to a drain. The relief valve comprises a valve head with differential surface areas exposed respectively and directly to the pressure of the purified water supply and to the pressure of the reject water supply upstream of the restrictor, wherein the differential surface areas are chosen for valve head movement to open a purified water relief port when the purified water pressure reaches a selected proportional limit relative to the reject water pressure. A diaphragm operates in conjunction with the valve head to positively prevent reject water leakage into the purified water supply.

REFERENCES:
patent: 2597693 (1952-05-01), Wolcott, Jr.
patent: 3542199 (1970-11-01), Bray
patent: 3568843 (1971-03-01), Brown
patent: 4077883 (1978-03-01), Bray
patent: 4176063 (1979-11-01), Tyler
patent: 4190537 (1980-02-01), Tondreau et al.

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