Replaces SW30-4040 Seawater 1,950 GPD at 800 PSI 4 x 40 inch 99.7% Rejection LG Membranes

LG Water Solutions 4" x 40" Seawater RO Membrane (SW30-4040 Compatible, 1,950 GPD)

Engineered as a premium, direct-fit replacement for the SW30-4040, this robust, high-rejection Seawater Reverse Osmosis (SWRO) element is developed by LG Water Solutions (a division of LG Chem). Utilizing innovative NanoH2O™ thin-film nanocomposite (TFN) technology, this professional-grade, 4-inch by 40-inch membrane provides exceptional performance for converting high-salinity seawater into potable water. The unique TFN structure embeds benign nanomaterials into the polyamide layer, offering superior salt rejection and consistent flow stability. This reduces the overall cost of desalination while delivering superior water quality even under challenging coastal and marine feed conditions.

Designed to seamlessly drop into standard commercial 4-inch pressure vessels, this compatible alternative delivers a balanced combination of excellent water purity and energy efficiency to meet the rigorous productivity demands of systems utilizing SW30-4040 membranes. Evaluated under standard test conditions at an applied pressure of 800 PSI, this element produces a highly 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 durability make it a highly efficient choice for small-to-medium scale SWRO systems, including onboard marine watermakers and coastal desalination plants where operational reliability is essential.