SKU: MEM-NF270-4040

Nanofiltration Membrane 2500 GPD, Filmtec (Size 3.9" x 40")

Sale price$389.00 USD

    • 2,500 GPD water production capacity
    • Removes high percentage of salts, nitrate, iron TOC & THM precursors
    • Medium to high salt passage and medium hardness passage
    • 97.0% stabilized salt rejection
    • Trouble-free treatment for a wide range of difficult feed water
    • Made in USA with advanced technology by Filmtec
Our FILMTEC™ commercial nanofiltration membrane provides high productivity performance while removing a high percentage of salts, nitrate, iron and organic compounds such as pesticides, herbicides, TOC and THM precursors with medium to high salt passage and medium hardness passage. The low net driving pressure of this membrane allows the removal of these compounds at low operating pressures. An ideal choice for surface water and ground water where good organic removal is desired with partial softening.

Operating Limits

Membrane Type

Polyamide Thin-Film Composite

Maximum Operating Temperature

113 DegreeF (45 DegreeC)

Maximum Operating Pressure

600 psig (41 bar)

Maximum Feed Flow Rate

-2540 elements: 6 gpm (1.4 m³/hr)
-4040 elements: 16 gpm (3.6 m³/hr)

Maximum Pressure Drop

- tape wrapped elements: 13 psig (0.9 bar)
- fiberglassed elements: 15 psig (1.0 bar)

pH Range, Continuous Operation

2-11

pH Range, Short-Term Cleaning

1-12

Maximum Feed Silt Density Index

SDI 5

Free Chlorine Tolerance

< 0.1 ppm
Important Information Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper start-up sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved. Before initiating system start-up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed. Please refer to the application information literature entitled “Start-Up Sequence” (Form No. 609-02077) for more information.

Operation Guidelines

Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows:

  • Feed pressure should be increased gradually over a 30-60 second time frame.
  • Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds.
  • Permeate obtained from first hour of operation should be discarded.

General Information

  • Keep elements moist at all times after initial wetting.
  • If operating limits and guidelines given in this bulletin are not strictly followed, the limited warranty will be null and void.
  • To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.
  • The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
  • Maximum pressure drops are 15 psi (1.0 bar) per element or 50 psi (3.4 bar) per multi-element pressure vessel (housing) whichever value is more limiting.
  • Avoid static permeate-side backpressure at all times.

Notice: The use of this product in and of itself does not necessarily guarantee the removal of cysts and pathogens from water. Effective cyst and pathogen reduction is dependent on the complete system design and on the operation and maintenance of the system.

About Filmtec

FILMTEC Corporation is the leading manufacture of reverse osmosis and nanofiltration membrane elements for industrial, municipal, commercial, and home drinking water treatment and purification, as well as for other specialty applications. The company was incorporated in 1977 and is headquartered in Minneapolis, Minnesota. FILMTEC Corporation is a subsidiary of The Dow Chemical Company and part of Dow's Water & Process Solutions business group.