Home / Products / Nanofiltration Membrane Elements / 90 Series / 8 Inch Nanofiltration Membrane 90 Series NF-90-400
UltraClean NF-90-400 Nanofiltration Membrane provide high flux and excellent performance of removing monovalent and divalent salts. It also has high removal rate of organic compounds, such as pesticides, herbicides and THM precursor, and etc.
UltraClean NF-90-400 Nanofiltration Membrane elements can achieve high water production and have excellent removal performance of monovalent and divalent salts removal rates, such as pesticides, herbicides and THM precursors, etc., have high removal capacity for natural organic matter. In the process of water treatment, it can reduce the hardness of water, and can also effectively remove toxic and harmful substances in water, and remove turbidity, chromaticity and organic matter. In addition, high-priced salts and small-molecule organics with economic value can be recovered. It requires low net driving pressure, and can effectively remove impurities or recover useful substances under very low operating pressure. The system has low energy consumption and good economy. Suitable for papermaking, printing and dyeing industries and municipal water treatment systems.
Excellent removal of salts
Suitable for removing TOC and THM precursors
Salt removal under ultra-low pressure and low energy consumption
Membrane Performance Specification
|Effective Membrane Area|
Test conditions: inlet pressure 0.48 MPa (70 psi); inlet temperature 25°C (77°F); inlet water quality 2000ppm NaCl, 2,000 ppm MgSO4 inlet pH 8; recovery 15%.
It is recommended that systems using these elements rinse the elements for 24 hours, prior to first use, to meet NSF/ANSI 58 Standard.
The first full tank of permeate must be discarded. Do not use this initial permeate for drinking water or food preparation.
Keep elements moist at all times after initial wetting.
To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution. Rinse out the preservative before use.
The membrane shows some resistance to short-term attack by chlorine (hypochlorite). Continuous exposure, however, may damage the membrane and should be avoided.
Operating and Cleaning Limits
|Maximum Operating Pressure||41 bar (600 psi)|
|Maximum Operating Temperature||45°C (113°F )|
|Maximum Element Pressure Drop||1.0 bar (15psi)|
|pH Range Continuous Operation||2-11|
|pH Range Short-Term Cleaning||1-13|
|Maximum Feed SDI(SDI15)||5.0|
|Free Chlorine Tolerance||< 0.1 ppm|
Permeate flow for individual elements may vary ±15 percent from the value specifed.
Active membrane area guaranteed ±4%.
Stabilized salt rejection is generally achieved within 24-48 hours of continuous use; depending upon feedwater characteristics and operating conditions.