LG BW 4040 ES

Energy-Saving Brackish Water Reverse Osmosis (BWRO) Element


LG Chem’s NanoH2O™ 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 4040 ES
Permeate Flow Rate 9.5 m³/d (2,500 gpd)
Minimum NaCI Rejection 99.2%
Stabilized NaCI Rejection 99.5%
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 +/- 20%.

Operating Specifications

LG BW 4040 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 3.6 m³/h (16 GPM)

Product Dimensions

LG BW 4040 ES
Length 101.6 cm (40 in.)
Element Outside Diameter (O.D.) 100 mm (3.9 in.)
Permeate Tube Inside Diameter (I.D.) 19 mm (0.75 in.)
Core Tube Extension 27 mm (1.05 in.)
Weight 3.6 kg (8.0 lbs.)