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ESPA2 MAX Hydranautics Membrane

Hydranautics RO Membrane Elements


ESPA-2-MAX Hydranautics Membranes

ESPA® Ultra Low Pressure Membrane

ESPA2 MAX membrane element featuring high productivity (12,000 gpd) and high rejection (99.6%) in factory test conditions. Element has 440 ft2 of membrane.

ESPA® (Energy Saving Polyamide) elements achieve high flux/lower pressure without compromising standards for high rejection. Since its introduction in the late 1990s, the ESPA® membrane has gained wide acceptance in the water treatment industry due to the significant operational cost savings associated with their use. 4" and 8" configurations available.

Hydranautics’ line of ESPA products are widely acclaimed for their effectiveness among a wide variety of water treatment applications, for working at a remarkably low operating pressures, providing higher flows, and saving more energy than any other membrane type.

Advantages:
  • Up to 99.6% nominal rejection
  • Lower pressure for lower CAPEX/OPEX
  • Applications
  • Municipal potable and wastewater plants
  • Bottling operations
  • Light industrial

  • Product Offering*
    ESPA1, ESPA2, ESPA2 MAX, ESPAB (high boron rejection), ESPAB MAX, ESPA2-LD (low colloidal and biological fouling), ESPA4

    Performance

    • Permeate Flow: 12,000 gpd (45.4 m3/d)
    • Salt Rejection: 99.6 % (99.5 % minimum)
    • Boron Rejection (Typical)@ pH = 10: 93.0 %†

    Type

    • Configuration: Spiral Wound
    • Membrane Polymer: Composite Polyamide
    • Membrane Active Area: 440 ft2 (40.8m2)

    Application Data*

    • Maximum Applied Pressure: 600 psig (4.16 MPa)
    • Maximum Chlorine Concentration: < 0.1 PPM
    • Maximum Operating Temperature: 113 oF (45 oC)
    • pH Range, Continuous (Cleaning): 2-10.6 (1-12)*
    • Maximum Feedwater Turbidity: 1.0 NTU
    • Maximum Feedwater SDI (15 mins): 5.0
    • Maximum Feed Flow: 75 GPM (17.0 m3/h)
    • Minimum Ratio of Concentrate to
    • Permeate Flow for any Element: 5:1
    • Maximum Pressure Drop for Each Element: 10 psi

    * The limitations shown here are for general use. For specific projects, operating at more conservative values may ensure the best performance and longest life of the membrane. See Hydranautics Technical Bulletins for more detail on operation limits, cleaning pH, and cleaning temperatures.

    Test Conditions

    The stated performance is initial (data taken after 30 minutes of operation), based on the following conditions:

    • 1500 PPM NaCl solution
    • 150 psi (1.05 MPa) Applied Pressure
    • 77 °F (25 °C) Operating Temperature
    • 15% Permeate Recovery
    • 6.5 - 7.0 pH Range

    (Data taken after 30 minutes of operation)

    A, inches (mm) B, inches (mm) C, inches (mm) Weight, lbs. (kg)
    40.0 (1016) 7.89 (200) 1.125 (28.6) 36 (16.4)