Osmotic water purification pumping system with flush valve

Details Osmotic water purification pumping system with flush valve Osmotic water purification pumping system with flush valve

1992-12-30

1994-02-08

Bertsch, Richard A.

Pumps

Diverse pumps

Including rotary nonexpansible chamber type

417205, 417214, 417440, F04B 2314

Patent

active

052844242

ABSTRACT:
The invention relates to a pump arrangement, especially for the operation of an osmotic water purifier comprising a filter housing (10) having a raw water inlet (11), a filtrate outlet (15), a reject outlet (16), and a flush valve (18) adapted to be opened for flushing raw water through the filter housing. The pump arrangement comprises a high pressure pump (12) for supplying raw water at the required pressure, and a circulation pump (13) for recirculating a relatively large flow through the filter housing. The high pressure pump (12) consists of a sliding vane pump of the type in which the vanes (24) are caused to sealingly engage the surrounding wall of the pump chamber by a hycraulic pressure supplied from the pressure side of the high pressure pump. The inlet of the high pressure pump is connected to a pressurized water supply line, whereby, when the flush valve (18) is opened and said pressure ceases, said vanes are moved radially inwards and the high pressure pump is opened for allowing a through flow exceeding its normal capacity.

REFERENCES:
patent: 3747763 (1973-07-01), Kain
patent: 3907686 (1975-09-01), Fletcher et al.
patent: 4115276 (1978-09-01), Kelly
patent: 4367140 (1983-01-01), Wilson
patent: 4759846 (1988-07-01), MacFarlane
patent: 5203803 (1993-04-01), Schoenmeyr

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