SWC6-LD Hydranautics RO Membrane


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SWC6 membranes are the highest permeate flow membranes offering high energy efficiency. They are the membranes of choice when the seawater feed temperatures are lower that normally requires high feed pressures. SWC6 membranes result in lower feed pressures, lower energy consumption and lower treatment costs.

Delivering consistent high quality outputs at lower fouling, SWC6-LD membranes provide high flow and excellent salt rejections at low operating pressures.

SWC6-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 SWC6-LD membrane does not need to be cleaned frequently – thus reducing treatment cost – while offering extreme durability and consistent performance.

SWC6-LD membranes are available in 4.0 and 8.0 inch diameters and SWC6 MAX membranes in 8.0 inch diameters.


Permeate Flow (Low Pressure): 6,000 gpd (22.7 m3/d)
Permeate Flow (High  Pressure): 12,000 gpd (45.5 m3/d)

Salt Rejection (Low Pressure): 99.6% (99.4 % min)
Salt Rejection (High Pressure): 99.8 % (99.7 % min)

Boron Rejection (Typical)† (Low Pressure): 83.0%
Boron Rejection (Typical)† (High Pressure): 91.0%

Applied Pressure (Low Pressure): 600 psi (4.1 MPa)
Applied Pressure (High Pressure):800 psi (5.4 MPa)


Configuration: Spiral Wound
Membrane Polymer: Composite Polyamide
Membrane Active Area: 400 ft2 (37.2m`2)
Feed Spacer: 34 mil (0.864 mm)

Application Data

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
* 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.

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