Filmtec (NF90-4040) NANO Filtration Membrane 2,200 GPD 4" X 40"Filmtec Commercial Nanofiltration Filmtec NF90 4040 Nanofiltration Membrane High performance nanofiltration for commercial applications requiring selective separation of salts, organics, and hardness at lower operating pressures than standard RO membranes NANOFILTRATION COMMERCIAL WHY IT WORKS Selective separation at lower operating pressures Low Pressure Operation The NF90 4040 operates efficiently at 70 psi, significantly lower than standard RO