ESPA1-7 Hydranautics Nitto Membranes

Hydranautics ESPA1-7 Low Energy Brackish Water RO Membrane

The Hydranautics (Nitto) ESPA1-7 is a high-productivity, low energy reverse osmosis (RO) membrane engineered for demanding brackish water and industrial water treatment applications. As a premier element within the Energy Saving Polyamide (ESPA) series, this 8-inch by 40-inch spiral-wound membrane utilizes advanced thin-film composite polyamide technology to deliver exceptional water purity while significantly reducing overall energy consumption. The "-7" model designation highlights its enhanced 400 square foot active membrane area configuration. This increased surface area maximizes water productivity without increasing the physical footprint, allowing it to drop seamlessly into any standard 8-inch commercial pressure vessel.

Designed to optimize facility operating costs, the ESPA1-7 produces a robust permeate flow rate of 12,000 gallons per day (GPD) with a stabilized salt rejection of 99.3%. It achieves these reliable performance metrics at an applied test pressure of only 150 PSI, allowing facilities to utilize smaller high-pressure pumps and lower electrical consumption compared to traditional brackish water membranes. Engineered with a durable fiberglass outer wrap, it safely accommodates a maximum operating pressure of 600 PSI and maximum feed flow rates up to 85 GPM. This combination of high surface area, energy-efficient operating pressure, and rigorous dissolved solids rejection makes the ESPA1-7 an optimal, industry-standard solution for municipal drinking water systems, large-scale commercial water purification, and high-purity industrial process water applications.