The A-Series proprietary thin-film reverse osmosis membrane elements are characterized by high flux and high sodium chloride rejection. AK HR low pressure brackish elements are selected when high rejection and low operating pressures are desired. These elements allow significant energy savings since good rejection is achieved at operating pressures as low as 100 psig (689 kPa).
These elements are recommended for low brackish water with salt concentration (TDS) levels up to 5,000mg/l. In turn, AK HR elements produce a permeate quality close to a standard brackish membrane element at a much lower pressure. AK HR Series is certified to NSF/ANSI 61 (AK-400, 34 NSF/ANSI certification is pending).
Typical Operating Pressure: 120 psi (830 kPa)
Typical Operating Flux: 10-20 GFD (15-35 LMH)
Maximum Operating Pressure 600 psi (4,136 kPa)
Maximum Temperature Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH range Optimum rejection pH: 7.0-7.5,
Continuous operation: 2.0-11.0,
Clean-In-Place (CIP): 1.0-13.0 (1)
Maximum Pressure Drop Over an element: 12 psi (83 kPa)
Per housing: 50 psi (345 kPa)
Chlorine Tolerance 1,000+ ppm-hours,
Feedwater NTU < 1 SDI 15 < 5