LG CW 4040 SF 2,900 GPD at 100 PSI 4 x 40 inch 99% Rejection Car Wash Spot Free Rinse Membranes

LG Water Solutions CW 4040 SF Spot-Free Rinse RO Membrane (2,900 GPD)

The LG Water Solutions (LG Chem) LG CW 4040 SF is an advanced, ultra-low pressure brackish water reverse osmosis (RO) membrane engineered specifically for the commercial car wash industry. Manufactured utilizing proprietary Thin Film Nanocomposite (TFN) technology, this 4-inch by 40-inch spiral-wound element features benign nanomaterials embedded within the polyamide layer. This innovative construction maximizes permeability and anti-fouling properties, allowing the membrane to deliver high productivity at significantly reduced feed pressures without compromising water quality. It is widely specified for spot-free rinse applications and commercial water treatment systems prioritizing energy efficiency and high-volume throughput.

Designed for seamless integration into standard commercial housings, the LG CW 4040 SF provides an exceptional permeate flow rate of 2,900 GPD with a stabilized salt rejection of 99.0% under standard testing conditions. The element utilizes an 85 square foot active membrane area and features a 28-mil feed spacer to balance flow dynamics and minimize particulate fouling. Operating efficiently at a test pressure of only 100 PSI, this membrane drastically reduces the energy consumption of high-pressure booster pumps while safely accommodating a maximum applied pressure of 600 PSI for demanding feed water environments. By combining state-of-the-art nanocomposite materials with an industry-standard configuration, this RO element delivers reliable, continuous-duty operation for mission-critical purification systems.