DOW™ FILMTEC™ BW30FR-365 elements have purified high biofouling feed waters since 1997. Numerous customers around the world have experienced lower operating costs by using DOW FILMTEC fouling resistant elements due to their exceptional fouling resistance and cleanability.
Uses for BW30FR-365 Membrane Elements
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. 609-02077) 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 DOW™ FILMTEC™ Reverse Osmosis and Nanofiltration Three-Year Prorated Limited Warranty (Form No. 609-35010) will be null and void.
- To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.
- The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
- Maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4 bar).
- Avoid static permeate-side backpressure at all times.
|Product||Part number||Active area ft2 (m2)||Feed spacer thickness (mil)||Permeate flow rate gpd (m3/d)||Stabilized salt rejection (%)||Minimum salt rejection (%)|
|BW30FR-365||174961||365 (34)||34||9,500 (36)||99.5||99|
DOW™ FILMTEC™ BW30FR-365 elements have purified high biofouling feed waters since 1997. Numerous customers around the world have experienced lower operating costs by using DOW FILMTEC fouling resistant elements due to their exceptional fouling resistance and cleanability. The BW30FR-365 element features:
- A wide (34 mil) feed spacer to facilitate improved cleaning.
- A proprietary modification to the FT30 membrane chemistry providing superior
- cleanability and resistance to fouling.
- DOW FILMTEC membrane with one of the widest pH cleaning ranges in the industry
- (pH 1-13) allowing for effective cleaning of scaling, organic compounds and biofilm.
- Efficient membrane element design with more, shorter membrane leaves to help reduce
- the overall effect of fouling.
The DOW FILMTEC BW30FR-365 element can be used for both potable and non-potable water applications.
A system designer can take advantage of this high productivity, high rejection, fouling resistant reverse osmosis (RO) element in any system design where the potential of high biofouling is expected. In addition, existing installations that are experiencing high biofouling or frequent cleanings can be upgraded by retrofitting to the FILMTEC BW30FR-365 element. In either case DOW FILMTEC BW30FR-365 elements can reduce the operating costs in most biofouling cases by lowering membrane fouling, reducing average system operating pressure, and extending membrane life.
- Membrane Type Polyamide Thin-Film Composite
- Maximum Operating Temperature 113°F (45°C)
- Maximum Operating Pressure 600 psig (41 bar)
- Maximum Pressure Drop 15 psig (1.0 bar)
- pH Range, Continuous Operation 2 - 11
- pH Range, Short-Term Cleaning (30 min.) 1 - 13
- Maximum Feed Flow 70 gpm (16 m3/h)
- Maximum Feed Silt Density Index SDI 5
- Free Chlorine Tolerance<0.1 ppm
Ideal Applications Include:
Potable and non-potable water applications