Description
Vontron Membranes
ULP series of ultra-low pressure aromatic polyamide compound membrane element newly developed by Vontron Membrane Technology Co., Ltd. can work under ultra low pressure to reach as high permeate flow and rejection same as regular low-pressure membrane element, and is applicable to desalination of surface water and underground water. It operates under approximately two thirds of the operating pressure of regular low-pressure composite membranes, which can decrease the investment costs for such relevant facilities as pumps, pipelines, and containers, etc. and the operating cost for the RO system, thus increasing the economic efficiency.
Applicable to desalination treatment of those water sources with NaCl lower than 2000 ppm, such as surface water, underground water, tap water and municipal water, ULP series membrane elements are mainly applicable to such as pure water, boiler water replenishment, foodstuff processing, and pharmaceutical production.
Performance parameters of the membrane element
| Model | Active Membrane Area ft2(m2) |
Average Permeate GPD(m3 /d) |
Stable Rejection Rate % |
Min. Rejection Rate % |
| LP22-4021 | 36（3.3） | 950（3.6） | 99 | 99.3 |
| Testing Conditions |
Testing Pressure Testing Solution Temperature Concentration of Testing Solution (NaCl) pH value of Testing Solution Recovery Rate of Single Element |
150 psi (1.03Mpa) 25˚C 1500ppm 7.5 15% |
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| Operation Limits & Conditions |
Max. Working Pressure Max. Temperature of Feed water Max. Volume of Feed water Max. Feed water SDI15 pH Range of Feed water during Continuous Operation pH Range of Feed Water during Chemical Cleaning Residual Chlorine Concentration of Feed Water Max. Pressure Drop of Single Membrane Element Max. Pressure Drop of Single Pressure Vessel with Six RO Membranes |
600psi（4.14Mpa） 45˚C 75gpm (173/h) 5 3~10 2~12 <0.1ppm 15psi (0.1Mpa) 50psi (034Mpa) |
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