LG SW 4040 R 1,950 GPD at 800 PSI 4 x 40 inch 99.7% Rejection Seawater Membranes

LG Water Solutions SW 4040 R Seawater RO Membrane (1,950 GPD)

The LG SW 4040 R is a robust, high-rejection Seawater Reverse Osmosis (SWRO) element developed by LG Water Solutions (LG Chem). Utilizing innovative NanoH2O™ thin-film nanocomposite (TFN) technology, this professional-grade, 4-inch diameter by 40-inch long membrane provides exceptional performance for converting high-salinity seawater into potable water. The unique TFN structure offers superior salt rejection and consistent flow stability, reducing the overall cost of desalination while delivering superior water quality even under challenging coastal and marine feed conditions.

Engineered to seamlessly fit standard commercial 4040 pressure vessels, the SW 4040 R delivers a balanced combination of excellent water quality and energy efficiency. Evaluated under standard test conditions at 800 PSI, this element produces a reliable nominal permeate flow rate of 1,950 gallons per day (GPD) while maintaining an outstanding 99.7% stabilized salt rejection rate. Its high-purity yield and proven, long-lasting reliability make it a highly efficient choice for small-to-medium scale SWRO systems, including onboard marine watermakers and coastal desalination plants, where operational durability is essential.