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Applied Membranes NF9 spiral wound nanofiltration 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 NF9 membrane allows the removal of these compounds at low operating pressures.
Applied Membranes nanofiltration elements are manufactured in our ISO 9001:2015 certified facility and are 100% quality and performance tested.
| Part Number: | M-N4040A9 |
| Membrane Size (Nominal): | 4x40 |
| Membrane Dimensions: | 3.9" Dia. x 40" L |
| Flow Rate: | 2,000 GPD (7,570 LPD) |
| Test Pressure: | 150 psi (1 MPa) |
| Average Salt Rejection (NaCl): | 90% |
| Average Hardness Rejection (MgSO4): | 97%+ |
| Single Element Recovery: | 15% |
| Feed Water Test Temperature: | 77°F (25°C) |
| Feed Water pH Range: | 3–10 |
| Chlorine Tolerance: | < 0.1 ppm |
| Membrane Type: | N9 Nanofiltration |
| Element Type: | Spiral Wound |
| Outer Wrap: | Tape Wrapped |
| End Style: | Male PWT (Stinger Style) |
| For Housing: | Standard 4" x 40" |
| Can Replace: | DuPont FilmTec NF90-4040 |
| Manufacturer: | Applied Membranes, Inc. |
| Country of Manufacture: | Manufactured in the USA with globally sourced parts — Vista, California. |
Note: Performance specifications based on 2,000 mg/l magnesium sulfate, 150 psi (1 MPa) applied pressure, 77°F (25°C) feed water temperature, and the recovery listed in the table above. Element permeate flow may vary ±20%. Permeate flow rates for feed streams other than water will vary.

| Total Length (L): | 40 in. (101.6 cm) |
| Membrane Length (I): | 38 in. (96 cm) |
| Diameter (D): | 3.9 in. (9.9 cm) |
| PWT (P): | 0.75 in. (1.9 cm) |
Applied Membranes M-N4040A9 membrane elements fit industry standard 4040 membrane housing pressure vessels and can be used as a direct replacement for many industry-standard 4" x 40" spiral wound nanofiltration elements with 3/4" male product water tubes ("stinger style"). These include the DuPont FilmTec NF90-4040.