Nanofiltartion membranes are very much similar to Reverse osmosis membranes except the degree of removal of monovalent ions such as chlorides etc. RO membranes provides 90 – 99% removal of ions while Nanofiltartion membrane are used for the selective removal of ions from 50 % to 90 % depending upon the material and manufacturing of the membrane.

Nanofiltartion membrane is a liquid separation technology that is positioned between reverse osmosis (RO) and Ultrafiltration and can remove the molecules falling in between range.

NF is essentially a lower-pressure version of reverse osmosis where the purity of product water is not very critical or the level of dissolved solids to be removed is less than what is typically encountered in brackish water or seawater. As such, Nanofiltartion is especially suited to treatment of well water or water from many surface supplies like rivers or lakes.

The system operations are normally governed by PLC.