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Table 2

Spiral-wound RO membrane specifications

Module parametersModule IModule IIModule III
Permeate channel length/permeate flow path distance (m) 1.372 0.686 1.372 
Permeate channel width/feed flow path distance (m) 0.224 0.224 0.224 
Feed spacer 
Thickness (mm) 0.40–0.43 0.40–0.43 0.40–0.43 
Material Polyethylene Polyethylene Polyethylene 
Overlap angle (deg) 90 90 90 
Wales/inch 34–38 34–38 34–38 
Courses/inch 38–42 38–42 38–42 
Permeate spacer 
Thickness (mm) 0.22–0.28 0.22–0.28 0.40–0.43 
Material Bicomponent polyester Bicomponent polyester Polyethylene 
Overlap angle (deg) 90 90 90 
Wales/inch 34–38 34–38 34–38 
Courses/inch 38–42 38–42 38–42 
Manufacturer DOW DOW DOW 
Tradename FILMTEC™ XLE FILMTEC™ XLE FILMTEC™ XLE 
No of leaves Single Dual Single 
Membrane surface area (m20.613 0.613 0.613 
Module parametersModule IModule IIModule III
Permeate channel length/permeate flow path distance (m) 1.372 0.686 1.372 
Permeate channel width/feed flow path distance (m) 0.224 0.224 0.224 
Feed spacer 
Thickness (mm) 0.40–0.43 0.40–0.43 0.40–0.43 
Material Polyethylene Polyethylene Polyethylene 
Overlap angle (deg) 90 90 90 
Wales/inch 34–38 34–38 34–38 
Courses/inch 38–42 38–42 38–42 
Permeate spacer 
Thickness (mm) 0.22–0.28 0.22–0.28 0.40–0.43 
Material Bicomponent polyester Bicomponent polyester Polyethylene 
Overlap angle (deg) 90 90 90 
Wales/inch 34–38 34–38 34–38 
Courses/inch 38–42 38–42 38–42 
Manufacturer DOW DOW DOW 
Tradename FILMTEC™ XLE FILMTEC™ XLE FILMTEC™ XLE 
No of leaves Single Dual Single 
Membrane surface area (m20.613 0.613 0.613 
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