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HUAMO Seawater Reverse Osmosis Membrane SW4040

SW series of aromatic polyamide compound membrane element developed by HUAMO is applicable to desalination of seawater. By optimizing the structure of membrane element, the SW series increases the permeate flow, and requires fewer elements for same permeate flow. It is characterized by low operating pressure, low investment in equipment, excellent rejection rate and reliable performance, and its high salt rejection can ensure the production of the drinking water from seawater simply through one-pass RO design.


  • Description
  • HUAMO Seawater RO membranes SW4040, brings together the world's top film production technology, reduce the cost of desalination while delivering superior water quality. Our seawater RO membranes provide industry leading salt rejection conventional technologies. We continue to leverage the technological advantages of our seawater RO membranes to expand our market share, achieved 50,000 units shipped annually for both new and replacement market since the establishment. Huamo SW membranes offer the highest rejection for the best product water quality; suitable for high salinity seawater .

    Product Specifications















    Active Membrane

    Permeate flow

    Stabilized Salt


    Minimum Salt





    Feed Spacer,


    Area, ft² (m²)

    rate, GPD (m³/d)

    Rejection, %


    Rejection, %


    Rejection, %














    80 (7.4)

    1,950 (7.4)



















    Test Conditions : 32,000 ppm NaCl, 5 ppm boron at 25°C (77°F), 800 psi (55 bar), pH 8, Recovery 8%.






    Permeate flows for individual elements may vary +/-15%.

































    mm (in.)


    mm (in.)


    mm (in.)

    kg (lbs.)






















































    All dimensional information is indicative and for reference purpose only. Please contact Huamo Team for detailed technical specification.



    Operating Specifications




    Max. Applied pressure

    1,200 psi (82.7 bar)

    Max. Chlorine concentration

    < 0.1 ppm



    Max. Operating temperature

    45°C (113°F)

    pH Range, Continuous (Cleaning)

    2-11 (2-13)



    Max. Feedwater turbidity

    1.0 NTU

    Max. Feedwater SDI (15 mins)


    Max. Feed flow


    75 gpm (17 m3/h)

    Min. Ratio of concentrate to permeate flow for any element

    5 : 1



    Max. Pressure drop (ΔP) for each element

    15 psi (1.0 bar)


    The information and data contained herein are deemed to be accurate and reliable and are offered in good faith, but without guarantee of performance. Huamo Group assumes no liability for results obtained or damages incurred through the application of the information contained herein. Customer is responsible for determining whether the products and information presented herein are appropriate for the customer’s use and for ensuring that customer’s workplace and disposal practices are in compliance with applicable laws and other governmental enactments. Specifications subject to change without notice. 

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