4040 Desalination Machine Membranes 1,950 GPD at 800 PSI 4 x 40 inch 99.7% Rejection

4" x 40" Desalination Machine 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. Sized at a standard 4-inch diameter by 40-inch length, this membrane is designed to fit any desalination machine or system built around the widely used 4x40 membrane format, making it a dependable replacement or upgrade option across a broad range of SWRO equipment. The TFN structure delivers superior salt rejection and consistent flow stability, reducing the overall cost of desalination while maintaining high water quality even under challenging coastal and marine feed conditions.

Engineered to seamlessly fit standard commercial 4040 pressure vessels, this membrane delivers a balanced combination of excellent water quality and energy efficiency for any desalination machine built to accept a 4" x 40" element. Evaluated under standard test conditions at 800 PSI, it produces a reliable nominal permeate flow rate of 1,950 gallons per day (GPD) while maintaining an outstanding 99.7% stabilized salt rejection rate (99.5% minimum). Its high-purity yield and proven, long-lasting reliability make it a highly efficient choice for small-to-medium scale desalination machines, including onboard marine watermakers and coastal desalination plants, where operational durability and drop-in compatibility with existing 4x40 systems are essential.

Specification Table