DOW FILMTEC™ Membrane NF90 Nanofiltration (NF) Elements for Commercial Application.
Nanofiltration < 4" Elements allow selective separation of organics and salts for small industrial water treatment plants that produce less than approximately 1 gpm (230 L/h) of permeate.
Nanofiltration is a separation process characterized by organic, thin-film composite membranes with a pore size range of 0.1 to 10nm. Unlike reverse osmosis (RO) membranes, which reject all solutes, NF membranes can operate at lower pressures and offer selective solute rejection based on both size and charge.
680 GPD Water production capacity
97.0% Stabilized salt rejection
Removes high percentage of salts, nitrate, iron TOC & THM precursors
High flux results in high yields
Medium to high salt passage & medium hardness passage
Low energy usage reduces power consumption and costs
Durable with good cleanability for long element life
Trouble-free treatment for a wide range of difficult freed water
FilmTec performance and quality
Made in USA with advanced technology by Dow Filmtec
The DOW FILMTEC NF90 membrane elements provide high productivity performance while removing a high percentage of salts, nitrate, iron and organic compounds such as pesticides, herbicides and THM precursors. The low net driving pressure of the NF90 membrane allows the removal of these compounds at low operating pressures.
Nominal Active Surface Area ft2(m2)
Permeate Flow Rate gpd (m3/d)
Stabilized Salt Rejection (%)
Permeate flow and salt rejection based on the following test conditions: 2000 ppm MgSO4, 77ºF (25ºC)operating temperature and 15% permeate recovery at 70 psi (4.8 bar) applied pressure.
Permeate flows for individual elements may vary by -20%/+30%.