ESPA4-7 Hydranautics Nitto 100 PSI 12,000 GPD 8 inch x 40 inch 99.2% Rejection Energy Saving Membranes

Hydranautics ESPA4-7 Energy-Saving RO Membrane

The Hydranautics ESPA4-7 is a high-performance 8-inch reverse osmosis element engineered for ultra-low pressure operation. As one of the most energy-efficient membranes in the ESPA® (Energy Saving Polyamide) family, it is designed to deliver a high permeate flow of 12,000 gallons per day at a test pressure of only 100 psi. This makes it an ideal solution for large-scale municipal and industrial facilities looking to minimize energy consumption while maintaining superior salt rejection standards.

The ESPA4-7 is particularly effective in water treatment applications such as the second pass of a reverse osmosis system or for polishing low-TDS feedwaters. With a large active membrane area of 400 square feet, it allows for high productivity and effective removal of contaminants like silica and boron. By significantly reducing the required feed pressure compared to standard brackish water membranes, the ESPA4-7 helps operators lower total operational costs and achieve a more sustainable water treatment process.