| 摘要 |
<p>A reverse osmosis or filtration system uses one or more hydraulic intensifier (integrated motor and pump) to provide all the high pressure fluid to a semi-permeable membrane or filter, the intensifier being powered by the high pressure flushing flow leaving the membrane or filter uses, and by a pressurised inlet flow of fluid to be purified or filtered. The intensifier or pump comprises reciprocable means having a pair of first pressure surfaces and a pair of second pressure surfaces each bounding a respective first and second pressure chamber, control valve means to supply pressure fluid alternately to the chamber bounded by one of the first surfaces and to exhaust pressure fluid from the chamber bounded by the other of the first surfaces thereby causing the reciprocable means to reciprocate, fluid inlet and outlet valve means communicating with the chambers bounded by the second surfaces whereby the second surfaces pump fluid through the second chambers upon reciprocation of reciprocable means, the control valve means comprising a plurality of primary poppet valves each having a secondary bleed valve to reduce a force necessary to operate the valve.</p> |
