Combine the best of low-energy performance, fouling resistance, and maximum output with the Hydranautics ESPA2-LD MAX. This premium 8" x 40" RO membrane features expanded active area, LD Technology for reduced fouling, and exceptional energy efficiency — making it ideal for large-scale brackish water systems demanding high productivity at lower pressures. Key Specifications & Performance Permeate Flow: 12,000 gallons per day (45.4 m³/day) Salt Rejection: 99.6% (99.5% minimum) Active Membrane Area: 440 ft² (40.9 m²) — MAX design for higher throughput Feed Spacer: Optimized for low differential pressure and fouling resistance Test Conditions: 1,500 ppm NaCl, 150 psig (1.03 MPa) applied pressure, 77°F (25°C), 15% recovery, pH 6.5–7.0 Configuration: Low Fouling Spiral Wound Membrane Polymer: Composite Polyamide Dimensions: 8" diameter x 40" length (includes brine seal, interconnector, and O-rings) Key Benefits MAX Productivity: Larger active membrane area allows higher permeate flow or fewer elements/vessels, reducing capital costs and system footprint. LD Low-Fouling Technology: Minimizes colloidal and biological fouling for longer operating cycles, fewer cleanings, and extended membrane life. Energy Efficient: Low-pressure operation cuts pumping costs significantly while maintaining strong rejection. Robust Limits: Max Applied Pressure: 600 psig (4.14 MPa) Max Operating Temperature: 113°F (45°C) pH Range (Continuous / Cleaning): 2–10.6 (1–12) Max Feedwater Turbidity: 1.0 NTU Max Feedwater SDI (15 min): 5.0 Max Feed Flow: 75 gpm (17.0 m³/h) Max Pressure Drop per Element: 15 psi Chlorine Tolerance: < 0.1 ppm Ideal Applications Municipal drinking water and wastewater reclamation plants Industrial process water and boiler feed systems Large commercial RO installations focused on energy savings and high output Systems with variable or challenging brackish feeds requiring fouling resistance Any application benefiting from lower operating pressures and reduced maintenance Premium Quality & Packaging Supplied in protective polyethylene packaging with sodium meta-bisulfite solution, ready for reliable long-term performance in continuous-duty systems. Price: Competitive at KnappRO Chicago (contact for quotes on volume or system packages). The ESPA2-LD MAX delivers the ultimate balance of high rejection, maximum flow, low energy use, and fouling resistance — a top-tier choice for efficient, high-volume brackish water treatment. Questions about integrating this into your array or comparing it to other ESPA/CPA models? Let us know — we're happy to help optimize your setup. KnappRO Chicago — Quality Hydranautics RO membranes, affordable pricing, and dedicated support for your water treatment success.
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