2.5" x 40" Nanofiltration Membrane | NF 50| 50% Salt Rejection

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Applied Membranes Inc. Membrane Elements Water Treatment RO UF NF
2.5" x 40"  Nanofiltration Membrane | NF5 - 50% Salt Rejection | 97% Hardness Rejection

NF5 spiral wound nanofiltration elements are ideal for removing a high percentage of TOC and THM precursors with medium to high salt passage and medium hardness passage. NF5 membrane elements are an ideal choice for surface water and groundwater where good organic removal is desired with partial softening.

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:

  • 50% 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-N2540A5 Specifications

AMI Part Number: M-N2540A5
Membrane Size (Nominal): 2.5x40
Membrane Dimensions: 2.5"Dia. x 40"L
Flow Rate: 600 GPD (2,2710 LPD)
Test Pressure: 150 psi (1 MPa)
Average Salt Rejection (NaCl): 50%
Average Hardness Rejection (MgSO4): 97% +
For Housing: Standard 2540
Outer Wrap: Tape Wrapped
Membrane Type: NF5 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: 4-11
End Style: Male PWT (Stinger Style)
Can Replace: DuPont FilmTec NF270-2540
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:

  • Municipal Drinking Water
  • Partial Water Softening
  • Food and Beverage
  • Pharmaceutical

Reverse Osmosis Membrane Dimensions

Physical Dimensions of M-N4040A5:


Total Length (L):

40 In. (101.6 cm)

Membrane Length (I):

38 In. (96 cm)

Diameter (D):

2.5 In. (6.4 cm)

PWT (P):

0.75 In. (1.9 cm)


Replacement Compatibility for AMI  2.5 X 40 NF MEMBRANES

Applied Membranes M-N2540A5 membrane elements  fit industry-standard 2540 membrane housing pressure vessels and can be used as direct replacement for many industry-standard 25x40 size spiral wound nanofiltration elements with 3/4" male product water tubes ("stinger style"). These include DuPont DOW FilmTec NF270-2540.