LG SW 400 GR G2 7,500 GPD at 800 PSI 8 x 40 inch 99.75% Rejection Seawater Membranes

LG NanoH2O SW 400 GR G2 Seawater RO Membrane (7,500 GPD, 99.89% Rejection)   The LG SW 400 GR G2 is a second-generation seawater reverse osmosis (SWRO) element manufactured by LG Chem under its NanoH2O™ brand, purpose-built for single-pass SWRO systems that demand the highest permeate water quality available. Built on advanced Thin Film Nanocomposite (TFN) membrane technology, this G2-generation element delivers superior salt rejection and superior boron rejection compared to earlier-generation designs, giving system designers a combination of excellent permeate water quality and strong energy efficiency without increasing operating pressure. This 8-inch by 40-inch element provides 400 square feet of active membrane area and a permeate flow rate of 7,500 GPD (28.4 m³/d), backed by a stabilized salt rejection of 99.89% (99.75% minimum) and a boron rejection of 93%. A thicker 34-mil feed spacer improves resistance to fouling, helping maintain consistent performance over the membrane's service life in demanding seawater conditions. The element is certified to NSF/ANSI/CAN Standard 61 for drinking water system components, supporting its use in municipal and industrial desalination plants where regulatory compliance and water safety are essential. Backed by LG's position as a global leader in seawater reverse osmosis technology, the SW 400 GR G2 gives plant operators a dependable, high-rejection option for single-pass SWRO designs, helping meet stringent water quality standards while keeping system CAPEX requirements lower than comparable high-rejection alternatives.   Specification Table SPECIFICATION DETAILS Model Number SW 400 GR G2 Manufacturer LG Chem (NanoH2O / LG Water Solutions) Membrane Type Thin Film Nanocomposite (TFN) Polyamide, 2nd Generation Active Membrane Area 400 ft² (37 m²) Permeate Flow Rate 7,500 GPD (28.4 m³/d) Stabilized Salt Rejection 99.89% Minimum Salt Rejection 99.75% Stabilized Boron Rejection 93% Feed Spacer Thickness 34 mil Test Conditions¹ 32,000 ppm NaCl, 5 ppm Boron, 800 psi (55.1 bar), 25°C (77°F), pH 8, 8% Recovery Max Applied Pressure 1,200 psi (82.7 bar) Max Chlorine Concentration < 0.1 ppm Max Operating Temperature 45°C (113°F) pH Range (Continuous Operation) 2 – 11 pH Range (Cleaning) 1 – 13 Max Feed Water Turbidity 1.0 NTU Max Feed Water SDI (15 min) 5.0 Max Feed Flow 75 GPM (17 m³/h) Max Pressure Drop (Per Element) 15 psi (1.0 bar) Element Dimensions 40.0" Length x 7.9" O.D. (1,016 x 200 mm) Permeate Tube I.D. 1.125" (28.6 mm) Wet Weight 35 lbs (16 kg) Permeate Flow Variation ± 15% Certification NSF/ANSI/CAN Standard 61   ¹ Specifications are normalized performance values based on the standard test conditions listed above; permeate flow rates for individual elements may vary by ±15%.