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Dow Filmtec NF-400 40 inch × 8 inch Nanofiltration Membrane
Permeate flow and salt rejection based on the following test conditions: 2,000 ppm MgSO4, 130 psig (8.9 bar), 77°F (25°C), pH 8 and 15% recovery.Target water flow rates for new elements are: NF-2540 - 920 gpd (3.5 m3/d), NF-4040 - 3,050 gpd (11.5 m3/d), NF-400 - 13,700 gpd (51.9 m3/d).Minimum MgSO4 rejection is 98.0%. Stabilized rejection is >99%.Product specifications may vary slightly as improvements are implemented.
Instructions:Depending on the application requiremnts, new NF spiral elements may be cleaned prior to initial use. The cleaning procedure should be based on the application for which the elements are to be used. If cleaning with formulated agents is not available, an alkaline wash with wetting agent is recommended prior to initial use.
An appropriate alkaline wash consists of the following:
Operation GuidelinesAvoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows:
Hours of Operation (CST): 8:00am - 4:30pm Mon-Thur & 8:00am - 3:30pm Fri
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