Seawater Reverse Osmosis (SWRO) Membranes – LG SW 400 R

Global Project Wins Driven by Performance

LG Chem’s NanoH2O™ seawater RO membranes, incorporated with innovative Thin Film Nanocomposite (TFN) technology, deliver industry-leading salt rejection and 20% more flow than the membranes manufactured from conventional technologies. Our seawater RO membranes significantly reduce the cost of desalination while delivering superior water quality. In LG Chem, we do our utmost to fulfill customer needs and provide additional values from excellent commercial and technical supports. With state-of-the-art technology and customer focus, LG Chem has been awarded more than 3,000 Million Liter per Day (MLD) seawater projects since its establishment.


LG SW R (High Rejection) membranes offer a combination of high rejection and low energy requirements to reduce the total cost of desalination; suitable for medium to high salinity seawater applications.

Product Specifications

Active Membrane Area 400 ft² (37 m²)
Permeate Flow Rate 9,000 gpd (34.1 m³/d)
Stabilized Salt Rejection 99.85%
Minimum Salt Rejection 99.7%
Boron Rejection 93%
Feed Spacer 34 mil.

Test Conditions

NaCl 32,000 ppm
Boron 5 ppm
Pressure 800 psi (55 bar)
Temperature 25°C (77°F)
pH 8
Recovery 8%
Permeate Flow Variation +/-15%

Operating Specifications

Max. Operating Pressure 1,200 psi (82.7 bar)
Max. Chlorine Concentration <0.1 ppm
Max. Operating Temperature 45°C (113°F)
pH Range, Continuous (Cleaning) 2-11 (2-13)
Max. Feedwater Turbidity 1.0 NTU
Max. Feedwater SDI (15 minutes) 5.0
Max. Feed Flow 75 gpm (17 m³/h)
Min. Ratio of Concentrate to Permeate Flow for any Element 5:1
Max. Pressure Drop for Each Element 1.0 bar (15 psi)

Product Dimensions

Length 1,016 mm (40 inch)
Element O.D. 200 mm (7.9 inch)
Perm Tube I.D. 28.6 mm (1.125 inch)
Weight 16 kg (35 lbs.)