Hydranautics SWC4B-LD Membrane

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.

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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

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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

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[custom-usage]

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

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