DOW FILMTEC RO-4040-FF reverse osmosis membrane elements deliver high flux and exceptional quality water for applications requiring sanitary grade membrane elements. The full-fit configuration minimizes stagnant areas and is an ideal choice for applications requiring a sanitary design. All components comply with U.S. Food & Drug Administration standards.
Uses for RO-4040-FF Membrane Elements
- High flux rates
- Full-fit design
- Consistent quality from automated rolling
- FilmTec performance and quality
Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper start-up sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved. Before initiating system start-up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed. Please refer to the application information literature entitled “Start-Up Sequence (Form No. 609-00298) for more information.
Avoid 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:
- Feed pressure should be increased gradually over a 30-60 second time frame.
- Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds.
- Permeate obtained from first hour of operation should be discarded.
- Keep elements moist at all times after initial wetting.
- If operating limits and guidelines given in this bulletin are not strictly followed, the limitedwarranty will be null and void.
- To prevent biological growth during prolonged system shutdowns, it is recommended thatmembrane elements be immersed in a preservative solution.
- The customer is fully responsible for the effects of incompatible chemicals and lubricantson elements.
- Maximum pressure drop across an entire pressure vessel (housing) is 60 psi (4.1 bar).
- Avoid permeate-side backpressure at all times.
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DOW FILMTECTM RO reverse osmosis membrane elements deliver high flux and outstanding quality water for applications requiring sanitary grade membrane elements. The full-fit configuration minimizes stagnant areas and is optimal for applications requiring a sanitary design. All components comply with FDA standards.
- Membrane Type Thin-Film Composite
- Maximum Operating Temperature 113°F (45°C)
- Maximum Operating Pressure 600 psi (41 bar)
- Maximum Differential Pressure 15 psi (1.0 bar)
- Maximum Feed Turbidity 1 NTU
- Free Chlorine Tolerance Below Detectable Limits
- pH Range, Continuous Operation 3 – 10
- pH Range, Short-Term Cleaning (30 min.) 1 – 12
- Maximum Feed Silt Density Index (SDI) 5
Ideal Applications Include:
- Medical applications
- Sanitary uses