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Hydranautics ESPA-4641 Membrane

Quality parts at an exceptional value
Product Description

Industrial users worldwide have made ESPA their first choice for high productivity and salt rejection is the ESPA-4641, one of the best in energy-saving polyamide membranes. The growing family of ESPA RO membranes continue to meet the ever-increasing demands of the water treatment industry. There's an ESPA solution to satisfy even the most challenging water treatment needs with exceptional performance, productivity and savings.

[custom-specifications]
ESPA-4641 Specifications
  • Permeate Flow: 3600 gpd (13.6 m3/d)
  • Salt Rejection: 99.4% (97.5% minimum)
  • Configuration: Spiral Wound
  • Membrane Polymer: Composite Polyamide
  • Membrane Active Area: 120ft2

Elements are wet tested for quality assurance using the following conditions (Data taken after 30 minutes of operation):

  • 1500 PPM NaCl solution
  • 150 psi (1.03 MPa) Applied Pressure
  • 77°F (25°C) Operating Temperature
  • 15% Permeate Recovery
  • 6.5 – 7.0 pH Range
[/custom-specifications]
[custom-features]
Standard Operating Limits:
  • Maximum Applied Pressure: 300 psig (2.1 MPa)
  • Maximum Chlorine Concentration: < 0.1 PPM
  • Maximum Operating Temperature: 113° F (45°C)
  • pH Range; Continuous (Cleaning): 3.0 –10.0*
  • Maximum Feedwater Turbidity: 1.0 NTU
  • Maximum Feedwater SDI (15 mins): 4.0
  • Maximum Feed Flow: 18 GPM (3.0 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.

[/custom-features]
[custom-usage]
  • Municipal Potable and Wastewater Plants
  • Bottling operations
  • Light industrial
[/custom-usage]
[custom-documents] [/custom-documents]
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(1 review) Write a Review
  • 5
    Fast delivery

    Posted by Fati Z. on Apr 19th 2020

    Great supplier

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