WATER-ON-WATER FILTRATION SYSTEM WITH PRECISION METERING DEVICE

摘要

A water-on-water filtration system is provided that includes a filter member ( 480 ), two water-on-water vessels, and a precision metering device. Each water-on-water vessel also includes a first and a second chamber as well as a first piston ( 412) defining a mixing portion and a driving portion of the first chamber and a second piston ( 422) defining a concentrate portion of the second chamber. The system includes a plurality of valves that are controlled to place the first vessel in a fill state in which the first vessel is being filled with filtered water and concentrate, and a service state in which the diluted concentrate is pushed through a product conduit to its end use. A method of delivering filtered water is also provided