Hydranautics SWC4B-LD Membrane

Product Description

SWC4B membranes use the same polymer chemistry as SWC4 offering highest rejection including boron. SWC4B-LD and SWC4B MAX membranes are used in the production of potable waters when the permeate boron concentration is critical.They do not need the second pass thus reducing capital costs.

SWC4B-LD membranes use patented Low Differential LD™ technology designed to minimize colloidal fouling. They use a patented 34 mil thickness feed spacer that prevents colloidal fouling and increases the effectiveness of membrane cleaning.

As a result, the SWC4-LD membrane does not need to be cleaned frequently – thus reducing treatment cost – while offering extreme durability and consistent performance.


SWC4B-LD Specifications:
  • Permeate Flow: 5,800 gpd (21.96 m3/d)
  • Salt Rejection: 99.8 % (99.7 % minimum)
  • Type Configuration: Spiral Wound
  • Membrane Polymer: Composite Polyamide
  • Membrane Active Area: 400 ft2 (37.1m2)
  • Feed Spacer: 34 mil (0.864 mm)

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

  • 32,000 ppm NaCl
  • 800 psi (5.5 MPa) Applied Pressure
  • 77 °F (25 °C) Operating Temperature
  • 10% Permeate Recovery
  • 6.5 - 7.0 pH Range



Standard Operating Limits:
  • Maximum Applied Pressure: 1200 psig (8.27 MPa)
  • Maximum Chlorine Concentration: < 0.1 PPM
  • Maximum Operating Temperature: 113 °F (45 °C)
  • pH Range, Continuous (Cleaning): 2-11 (1-13)
  • 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: 15 psi



  • Seawater Desalting
  • Broad Offering of Membrane Formulations Designed to Accommodate Varying Levels of Seawater Salinities Worldwide


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

    Posted by Ramon E. on Jun 15th 2019

    Very, very fast dispatch

Related Products