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ULP31-4040 Ultra-Low Pressure Reverse Osmosis Membrane
The Vontron ULP31-4040 Ultra-Low Pressure RO Membrane is designed to deliver reliable, high-quality water treatment performance while operating at significantly reduced feed pressure. This membrane element provides excellent salt rejection and stable permeate output, making it an energy-efficient solution for commercial and industrial reverse osmosis systems.
 
Manufactured using advanced thin-film composite (TFC) membrane technology, the ULP31-4040 reduces operating costs without sacrificing water quality. It is fully compatible with standard 4” x 40” membrane housings and serves as a direct replacement for comparable ultra-low-pressure RO membranes.
 
The ULP31-4040 is ideal for applications where energy efficiency, system longevity, and consistent performance are critical, including commercial RO, industrial process water, and pre-treated municipal water systems.
 

ULP31-4040 Ultra-Low Pressure Reverse Osmosis Membrane

SKU: ULP31-4040

  • Model

    ULP31-4040

    Membrane Type

    Thin-Film Composite (TFC)

    Size

    4" x 40"

    Nominal Salt Rejection

    ≥ 99.5%

    Typical Permeate Flow

    ~3,100 GPD (11.7 m³/day)

    Operating Pressure

    Ultra-Low Pressure

    Maximum Operating Pressure

    600 psi (41 bar)

    Maximum Operating Temperature

    45°C (113°F)

    Maximum Feed SDI

    ≤ 5

    Feed Water pH (Continuous)

    2 – 11

    Feed Water pH (Cleaning)

    1 – 12

    Chlorine Tolerance

    < 0.1 ppm

    Compatibility

    Standard 4" RO pressure vessels
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