C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
182/19
C02F 1/44 (2006.01) B01D 61/00 (2006.01) B01D 61/08 (2006.01) B01D 61/12 (2006.01)
Patent
CA 1332714
- 0a - WATER PURIFICATION SYSTEM ABSTRACT A water purification system comprising a reverse osmosis unit (50) to separate feed water as product water and waste water, a reservoir (90) having bladder controlled expandable and contractible product water and control water chambers (94, 95, 96) and a control valve subsystem. The control valve subsystem includes a feed water shut-off valve (10) and a regulating valve (30). The shut-off valve (10) has a control chamber (20) subjected to product water pressure to control its open-closed condition, and is effective to close it at a predetermined upper limit of product water pressure. The regulating valve (30) includes two diaphragm areas (A1, A2) on a single moving element, two diaphragm operated valves (37, 38) (only one of which can be open at one time), and a relief valve (46). The regulating valve (30) is responsive to a demand for bladder control water to the reservoir (90) on diaphragm area (A1) to establish a first and higher level of control water flowing to the reservoir (90), and is also responsive to an excess of bladder control water flowing from the reservoir acting on diaphragm areas (A1) and (A2) to establish a second and lower level of control water back pressure in the reservoir (90). The regulating valve (30) thus automatically senses whether the system is requiring control water to be fed into the control water chamber (96) to raise its pressure level; or is requiring control water to be relieved from the control water chamber (96) to reduce its pressure level. The higher pressure of control water is desired as the motive pressure for delivery of product water at the faucet or ice maker (100); the -0b- lower back pressure of control water, during production and filling, enhances flow through the filtration unit (50).
568254
Brown Barry M.
Edwards Evan A.
Tone Frederick
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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