The FILMTEC SW30HRLE-400 delivers high performance over the operating lifetime without the use of oxidative post-treatments and provides high NaCl and boron rejection to help meet World Health Organization (WHO) and other drinking water standards.
Uses for SW30HRLE-400 Membrane Elements
DOW FILMTEC SW30HRLE-400 offers rejection and low total cost of water for seawater desalination.
- High flux reduces energy use or pressure required;
- good rejection results in good quality water;
- high boron rejection;
- 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. 609-02077) 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 limited warranty will be null and void. Refer to DOW™ FILMTEC™ Reverse Osmosis and Nanofiltration Element Three-Year Prorated Limited Warranty (Form No. 609-35010).
- 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)||Maximum operating pressure psig (bar)||Permeate flow rate gpd (m3/d)||Stabilized boron rejection %||Minimum salt rejection %||Stabilized saltrejection %|
|217822||400 (37)||1,200 (83)||7,500 (28)||92||99.65||99.8|
- Membrane Type Polyamide Thin-Film Composite
- Maximum Operating Temperaturea 113°F (45°C)
- Maximum Element Pressure Drop 15 psig (1.0 bar)
- pH Range, Continuous Operation 2 - 11
- pH Range, Short-Term Cleaning (30 min.) 1 - 13
- Maximum Feed Silt Density Index (SDI) SDI 5
- Free Chlorine Tolerance <0.1 ppm
Ideal Applications Include:
Municipal drinking water