RO Membrane 4021

Short Description:

RO Membrane 4021 series of industrial RO membranes are made of HID developed polyamide composite film, characterized by low operating pressure, higher flow, and improves desalination. They’re employed drinking water treatment plants in municipal drinking water supply, various industrial water purification, seawater desalination project, etc.

  • Brand Name: HID
  • Desalination: 99%
  • OEM/ODM: Accept
  • Manufacturer: Yes
  • Delivery Time: 2-7 days
  • Shipping Support: Express / Sea/ Land/ Air freight
  • Place of Origin: Jiangsu, China
  • E-mail:
  • Model: RT-4021HF
  • Product Detail


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    RO Membrane 4021

    HIDTM Industrial RO Membrane ranks the best brands in China among the RO membrane industry. RO Membrane 4021 has won the trust of thousands of families for feeding the reliable purified water over 10 years. Each membrane is made of HID developed & pre-examined sheet and goes through stringent making processes as well as in-house quality inspection & testing before delivery. HID Membrane has been certified by SGS & China Jiangsu Sanitation Bureau wrt drinking water membrane elements.

    HID ro membrane

    RO Membrane 4021 Model & Performance:

    Model RT-2521 HF RT-2540 HF RT-4021 HF RT-4040 HF RT-8040 HF
    Performance Stable Desalination % 98 98 98 99 99.3
    Min. Desalination % 97 97 97 98 98.5
    Mean Permeable Flow GPD (L/d) 380(1300)  780(2800) 1000(3400)  2800(9500)  11000(41000)
    Active Film Area ft2(m2) 13 (1.2) 28 (2.6) 36 (3.3) 97 (9) 400 (37)
    Test Conditions Pressure 100psi(0.7Mpa) 225psi(1.55Mpa)
    Water Temp. 25℃ 25℃
    Concentration(NaCl) 2000ppm 2000ppm
    Water PH 6.5 to 7.5 6.5 to 7.5
    Recovery Rate % 15 15
    Operating Conditions Max. Operating Pressure 600psi(4.2Mpa) 600psi(4.2Mpa)
    Max. Feed Water Temp. 45℃ 45℃
    Max. Feed Water Silt Density Index (SDI) 5 5
    Feed Water Chlorine Tolerance < 0.1ppm < 0.1ppm
    Feed Water PH Range, Continuous Operation 3 to 10 3 to 10
    Feed Water PH Range, Short-Term Cleaning 2 to 12 2 to 12
    Max. Pressure Drop of Single Membrane 15psi(0.1Mpa) 15psi


    1. Permeate flow rate and salt rejection is based on testing conditions: 25℃, PH 7.5, 20% recovery.
    2. Stabilized salt rejection is generally achieved within 24-48 hours of continuous use, depending upon feedwater characteristics and operating conditions.

    Start-up Data of Model ULP26-4040


    (test temp. 25℃; pressure at 150psi; TDS at 1500ppm)


    (test temp. 25℃; TDS at 1500ppm)

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  • HID RO Membranes are widely used in ultra-pure water, process pure water, cooling tower water, boiler water supply, pure water, throughout the electronics industry, optoelectronic industry, machinery manufacturing, fine chemical industry, medical pharmaceutical, food, and beverage industry, surface coating, and many other industries.

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