2.5" x 21" NF 90% Rejection Membrane

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AMI 2.5" x 21" Nanofiltration Membrane Element 


AMI 2.5 x 21 Nanofiltration Membrane produces 250 gallons per day at 90% rejection and fits a standard 2.5-inch by 21-inch membrane housing. AMI NF9 spiral wound nanofiltration membranes 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 Membranes are Made in the USA in their ISO 9001:2015 Certified Facility and are 100% Quality and Performance Tested.

Genuine AMI RO Membranes Made in USA NSF Approved ISO Certified


Specifications for M-N2521A9

AMI Part Number: M-N2521A9
Flow Rate: 250 GPD (946 LPD)
Membrane Type: NF9 nanofiltration
Average Salt Rejection: 90%
Average Hardness Rejection: +97%
For Housing: Standard Residential  2.5" x 21"

AMI Membranes Product Specifications

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 15% recovery.  Element permeate flow may vary ±15%.

Features of AMI Commercial NF Membranes

  • Removes 90% of total dissolved solids from water.
  • 97% Hardness Rejection
  • Low energy usage reduces power consumption and cost
  • Reliable Flow Rates
  • 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

Applications for AMI Commercial Nanofiltration Membranes

  • Commercial water demineralization
  • Food and Beverage
  • Pharmaceutical

AMI Reverse Osmosis Membranes for Home RO Systems

Physical Dimensions of M-N2521A9:


Total Length (L):

21 In. (53.3 cm)

Membrane Length (I):

19 In. (48 cm)

Diameter (D):

2.5 In. (6.4 cm)