Variable drain flow restrictor
AssigneeEcowater Systems, Inc.
InventorMichael J. Sherman
Life of this patent
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Abstract
A proportioning valve for a reverse osmosis system that controls the production of product water by the differential pressure across the purification membrane. By sensing increasing tank pressure to actuate the proportioning valve, the flow of waste water is restricted. Placement of seals within the cavity of the valve, as well as placement of waste water inlet and outlet ports, protects tension components that provide reverse tank pressure from waste water exposure. A needle valve assembly responsive to an actuating assembly that senses tank pressure removes the need for an inlet tank water port while restricting water flow.
Claims12
A proportioning valve for a reverse osmosis system comprising:
- a housing having an internal cavity with a reject water inlet proximate one end of said housing;
- a reject water outlet downstream of said reject water inlet;
- a needle valve assembly for restricting flow of water from said reject water inlet to said reject water outlet, said needle valve assembly responsive to a sensor.
Dependencies are inferred from the claim text.