Hydranautics ESPA3 Membrane

Product Description

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.

The growing family of ESPA RO membranes continue to meet the ever-increasing demands of the water treatment industry. ESPA2-LD-4040 offers unparalleled performance for your industrial and commercial water treatment needs. There's an ESPA solution to satisfy even the most challenging water treatment needs with exceptional performance, productivity and savings for high productivity and salt rejection.


ESPA3 Specifications:
  • Permeate Flow: 14,000 gpd (53.0 m3/d)
  • Salt Rejection (nominal) 98.5 %
  • Type Configuration: Spiral Wound
  • Membrane Polymer: Composite Polyamide
  • Nominal Membrane Area: 400 ft2

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



Standard Operating Limits:
  • Maximum Applied Pressure: 600 psig (4.16 MPa)
  • Maximum Chlorine Concentration: < 0.1 PPM
  • Maximum Operating Temperature: 113 °F (45 °C)
  • Feedwater pH Range: 3.0 - 10.0
  • 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



  • Municipal Potable and Wastewater Plants
  • Bottling Operations
  • Light Industrial


[custom-documents] [/custom-documents]
(1 review) Write a Review
  • 5
    Fast delivery

    Posted by Ariclene S. on Apr 12th 2018

    Great supplier

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