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4" x 40" Nanofiltration Membrane | NF 90| 90% Salt Rejection

In Stock for Immediate Shipment.
Price $277.78
More Information
Nominal Size 4" x 40"

Applied Membranes Inc. Membrane Elements Water Treatment RO UF NF
4" x 40"  Nanofiltration Membrane | NF9 - 90% Salt Rejection | 97% Hardness Rejection

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.

AMI NF Membranes are Made in the USA in their ISO 9001:2015 Certified Facility and are 100% Quality and Performance Tested.

Genuine AMI Membranes ISO USA Quality

Features of Applied Membranes Nanofiltration Membranes:

  • 90% Average Ion Rejection
  • >97% Hardness Rejection
  • High flux results in high yields
  • Low energy usage reduces power consumption and cost
  • Durable with good cleanability for long element life
  • Made in the USA
  • Manufactured in our ISO 9001:2015 Certified Facilities
  • 100% Performance and Quality Tested
  • Backed by our Experienced Technical Support Staff
  • High Quality for Consistent and Reliable Performance
  • Uses the most advanced membrane film technology and manufacturing processes
  • Standard dimensions to fit in commonly available housings



M-N4040A9 Specifications

AMI 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% +
For Housing: Standard 4" x 40"
Outer Wrap: Tape Wrapped
Membrane Type: N9 Nanofiltration
Element Type: Spiral Wound
Feed Water Test Temperature: 77°F  (25°C)
Single Element Recovery: 15%
Chlorine Tolerance: < 0.1
Feed water pH Range: 3-10
End Style: Male PWT (Stinger Style)
Can Replace: DuPont FilmTec NF90-4040
Manufacturer: Applied Membranes, Inc.
Country of Manufacture: United States (USA)

AMI Membranes Product Specifications

Note: Performance specifications based on 2,000 mg/l magnesium sulfate, 150 psi (1 MPa) applied pressure, 77ºF (25ºC) 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.

Applications for Nanofiltration Membrane Elements:

  • Commercial water demineralization
  • Food and Beverage
  • Pharmaceutical

Reverse Osmosis Membrane Dimensions

Physical Dimensions of M-N4040A9:


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)


Replacement Compatibility for AMI  4 X 40 NF MEMBRANES

Applied Membranes M-N4040A9 membrane elements fit industry standard 4040 membrane housing pressure vessels and can be used as direct replacement for many industry-standard 4x40 size spiral wound nanofiltration elements with 3/4" male product water tubes ("stinger style"). These include DuPont DOW FilmTec NF90-4040.