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

4" x 40" Seawater Reverse Osmosis Membrane (1,950 GPD, 99.7% Rejection)

This robust, high-rejection Seawater Reverse Osmosis (SWRO) element is developed by LG Water Solutions (LG Chem) using innovative NanoH2O™ thin-film nanocomposite (TFN) technology. This professional-grade, 4-inch diameter by 40-inch long membrane is engineered to convert high-salinity seawater into potable water, with a TFN structure that delivers superior salt rejection and consistent flow stability — reducing the overall cost of desalination while maintaining superior water quality even under challenging coastal and marine feed conditions.

Engineered to seamlessly fit standard commercial 4040 pressure vessels, this element delivers a balanced combination of excellent water quality and energy efficiency. Evaluated under standard test conditions at 800 PSI, it produces a reliable nominal permeate flow rate of 1,950 GPD while maintaining an outstanding 99.7% stabilized salt rejection rate (99.5% minimum). Its 80 ft² of active membrane area, 8% recovery rate, and 28-mil feed spacer combine to deliver high-purity yield and proven, long-lasting reliability in a compact commercial footprint.

Potential Applications: This element is well suited for a wide range of small-to-medium scale SWRO systems, including onboard marine watermakers for yachts, sailboats, and commercial vessels; coastal and island municipal desalination plants; offshore platforms and remote or off-grid installations; resort and hospitality freshwater systems; and emergency or disaster-relief water production, where compact size, energy efficiency, and operational durability are essential.

Specification Table