The A-Series, family of proprietary thin-film reverse osmosis membrane elements are characterized by high flux and excellent sodium chloride rejection. AK Low Pressure Brackish Water 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). AK3218T Low Pressure Brackish Water elements feature a tape outer wrap and 28 mil feed spacers. This element is designed with flush end connections.
Element Specifications |
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| Model | Flow | Avg. Rejection | Min. Rejection | Part Number | | AK3218T | 460 GPD | 99.5% | 99% | 1206803 |
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| Specifications are based on a 2000 mg/L NaCl solution at 225 psig operating pressure (1551 kPa), 77°F (25°C), 15% recovery, pH 7.5 after 24 hours. Individual flux may vary +25%/ -15%. |
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| Operating and Design Parameters |
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| Membrane: | Thin Film Membrane (TFM®) | | Typical Operating Pressure: | 200 psig (1,379 kPa) | | Maximum Pressure: | 450 psig (3,103 kPa) | | Maximum Temperature: | 122°F (50°C) | | Chlorine Tolerance: | 1,000 ppm-hrs, dechlorination recommended | | Optimum Rejection pH: | 7.0 -7.5 | | Operating pH Range: | 4.0 - 11.0 | | Cleaning pH Range: | 2.0 - 11.5 | | Feed NTU: | <1 | | Feed SDI: | <3 | | Typical Operating Flux: | 10-20 GFD (15-35) L.H-1.M-2 |
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