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AXEON® NF4-4040 Nanofiltration Membrane

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AXEON® NF4-4040 Nanofiltration Membrane

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AXEON NF4 - Series Membrane 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 AXEON NF4 – Series Membrane Elements allows the removal of these compounds at low operating pressures.

  • All Industry Standard Sizes
  • Nanofiltration Membrane Elements
  • Improved RO System Performance
  • Superior Quality and Cost Savings
  • Individually Inspected, Qualified and Vacuum Tested
  • Private Labeling and Customization Available

AXEON NF3-Series Membrane Elements are one of the industry’s most reliable and highest performing nanofiltration elements. AXEONNF3- Series Membranes are available in all standard commercial sizes and feature a protective ABS shell, an anti-telescoping device. Advanced membrane technology and manufacturing processes ensure high quality and performance. All elements are shipped dry for an indefinite shelf life and easier handling. AXEONNF3-Series Membrane Elements are 100% vacuum integrity tested and may also be ordered as individually wet tested.

Operating Limits
Membrane Type Polyamide Thin-Film Composite pH Range, Short Term Cleaning (30 Min.) 1 - 13
Maximum Operating Temperature 113oF (45oC) Maximum Feed Silt Density Index 5 SDI
Maximum Operating Pressure 600 psi (41 bar) Chlorine / Chloramine Tolerance 0 ppm
pH Range, Continuous Operation* 2 - 11 Maximum Feed Flow Rate (gpm) 2.5" = 6
4.0" = 14
  • * Maximum temperature for continuous operations above pH10 is 95°F / 35°C.
Product Specification
Part Number Description Applied Pressure psi (bar) Permeate Flow Rate gpd (m3/d) Nominal Salt Rejection (%)
200407 NF3 – 2514 70 (4.83) 200 (0.76) 40 – 50
200408 NF3 – 2521 70 (4.83) 350 (1.33) 40 – 50
200409 NF3 – 2540 70 (4.83) 850 (3.22) 40 – 50
200410 NF4 – 4014 70 (4.83) 400 (1.51) 40 – 50
200411 NF4 – 4021 70 (4.83) 1000 (1.51) 40 – 50
200411 NF4 – 4040 70 (4.83) 2500 (9.46) 40 – 50
  • Warranty Evaluation Test Conditions: Permeate flow and salt rejection based on the following test conditions – 550 ppm, filtered and dechlorinated municipal tap water, 77°F / 25°C, 15% recovery and the specified operating pressure. Permeate flows for warranty evaluation may vary -15% / +50% for 4.0" diameter elements and -20% /+30% for 2.5" diameter elements. Maximum pressure drop at 13 psig / 0.9 bar.
Dimensions inch (mm):
Description A B C D
NF4 – 2514 14 (355.6) 1.1 (27.94) 0.75 (19.05) 2.4 (60.96)
NF4 – 2521 21 (533.4) 1.1 (27.94) 0.75 (19.05) 2.4 (60.96)
NF4 – 2540 40 (1016.0) 1.1 (27.94) 0.75 (19.05) 2.4 (60.96)
NF4 – 4014 14 (355.6) 1.1 (27.94) 0.75 (19.05) 3.95 /100.3)
NF4 – 4021 21 (533.4) 1.1 (27.94) 0.75 (19.05) 3.95 /100.3)
NF4 – 4040 40 (1016.0) 1.1 (27.94) 0.75 (19.05) 3.95 /100.3)

All 2514, 2521 and 2540 elements fit nominal 2.50” I.D. membrane housings and all 4014, 4021 and 4040 elements fit nominal 4.00” I.D. membrane housings

  • 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. Before initiating system start – up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed. 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.
  • Permeate obtained from first hour of operation should be discarded.
  • Avoid static permeate – side backpressure at all times.
  • Cross – flow velocity at set operating point should be achieved gradually over 15 – 20 seconds.
  • Maximum pressure drop across an entire pressure vessel (housing) is 30 psi / 2.1 bar.
  • Under certain conditions, the presence of free chlorine, chloramines and other oxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, the manufacturer recommends removing all oxidizing agents by pretreatment prior to membrane exposure. Please contact the manufacturer or your supplier for more information.
    Do not use this initial permeate for drinking water or food preparation. Keep elements moist at all times after initial wetting. To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution. Rinse out the preservative before use. For membrane warranty details, please contact the manufacturer or your supplier for more information.
    If operating limits and guidelines given in this product specification sheet are not strictly followed, the warranty will be null and void. The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements. Use of any such chemicals or lubricants will void the warranty. These membranes may be subject to drinking water application restrictions in some countries:
    please check the application status before use and sale. 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.
    No freedom from infringement of any patent owned by the manufacturer or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, customer is responsible for determining whether products and the information in this document are appropriate for customer’s use and for ensuring that customer’s workplace and disposal practices are in compliance with applicable laws and other governmental enactments. The claims made may not have been approved for use in all countries. The manufacturer assumes no obligation or liability for the information in this document. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.

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