Valve arrangement for a pressurized water purifier
US5401395A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | May 11, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
It is proposed, in accordance with the invention, that a pressurized water purifier which includes an inlet conduit, a pressure-elevating pump mounted in the inlet conduit, a filter or membrane type purifying unit, a purified-water outlet conduit and a reject conduit for concentrated contaminated water that the reject conduit (22) includes a pressure-limiting valve (28) which is controlled by the pressure in the outlet conduit (18). This will enable the water purifier to operate at a required, high internal working pressure, while enabling the pressure of the purified water to be maintained at a maximum level limited by the water conduit system and to be varied in response to the water taken from the system in the absence of pulsations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.