LG BW 440 ES

High Rejection Brackish Water Reverse Osmosis (BWRO) Membrane Element


LG Chem’s NanoH2OTM brackish water RO membranes lower water treatment costs by improving energy efficiency and productivity. These thin-film nanocomposite (TFN) membranes feature benign nanomaterials incorporated into the thin-film polyamide layer of a composite membrane. This innovative patented and patent-pending technology significantly increases membrane permeability while matching best-in-class salt rejection.
  • Superior flux and high salt rejection
  • Ideal for low energy applications
  • Easy to retrofit existing RO plants

Product Specifications

  LG BW 440 ES
Active Membrane Area 41 m² (440 ft²)
Permeate Flow Rate 43.7 m³/d (11,550 gpd)
Minimum NaCI Rejection 99.5%
Stabilized NaCI Rejection 99.6%
Feed Spacer 28mil
  Note: The above values are normalized to the following conditions: 2,000 ppm NaCl, 10.3 bar (150 psi), 25°C (77°F), pH 8, 15% recovery. Permeate flows for individual elements may vary +/- 15%.

Operating Specifications

  LG BW 440 ES
Max. Operating Pressure 41 bar (600 psig)
Max. Chlorine Concentration < 0.1 ppm
Max. Operating Temperature 45°C (113°F)
pH Range, Continuous (Cleaning) 2-11 (2-12)
Max. Feedwater Turbidity 1.0 NTU
Max. Feedwater SDI (15 minutes) 5.0
Max. Feed Flow 19.0 m³/h (85 GPM)
Max. Pressure Drop for Each Element 1.0 bar (15 psi)

Product Dimensions


  LG BW 440 ES
Length 101.6 cm (40 in.)
Element Outside Diameter (O.D.) 200 mm (7.9 in.)
Permeate Tube Inside Diameter (I.D.) 28.6 mm (1.125 in.)
Weight 16.4 kg (36 lbs.)