Hydranautics LFC3-LD 4040 Membrane

Product Description

Superior membrane technology is the key to Hydranautics' innovative LFC (Low Fouling Composite) membrane. LFC membranes offer breakthrough technology in the treatment of difficult feedwaters and municipal wastewater. Until now, these applications have required significant pretreatment prior to subjecting them to a composite polyamide membrane.

The LFC3-LD-4040 is designed with a thicker brine spacer lowering the Delta P meeting the increased demand for lower fouling membranes that require less frequent cleanings while maintaining a high permeate flow. The LFC3-LD-4040 provides 11,000 gallons per day (41.6 m3/d) of flow at 99.7% nominal salt rejection. This membrane is well suited for the treatment of difficult feed waters for numerous municipal and industrial applications, which up to now required significant feed water pretreatment upstream of any composite reverse osmosis membrane.

LFC3-LD 4040 Specifications:
  • Permeate Flow: 2,100 gpd (7.95 m3/d)
  • Salt Rejection: 99.7% (99.5% minimum)
  • Configuration: Low Fouling Spiral Wound
  • Membrane Polymer: Composite Polyamide
  • Membrane Active Area: 80ft2 (7.43m2)
  • Feed Spacer: 34mil (0.864mm) with biostatic agent

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

  • 1500 PPM NaCl solution
  • 225 psi (1.55 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)
  • pH Range, Continuous (Cleaning): 2-10 (1-12)
  • Maximum Feedwater Turbidity: 1.0 NTU
  • Maximum Feedwater SDI (15 mins): 5.0
  • Maximum Feed Flow: 16 GPM (3.6 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.


  • Municipal/Industrial Surface and Wastewaters
  • Difficult Feedwaters Requiring Significant Pretreatment
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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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