DOW FILMTEC BW30FR-400 Membrane

DOW FILMTEC BW30FR-400 reverse osmosis elements incorporate Dow's proprietary FR (fouling resistant) membrane technology that provides excellent fouling resistance and cleanability and are designed to purify water with high biological or organic fouling potential in systems with well-controlled pretreatment. This high rejection membrane has a wide pH cleaning range (pH 1-13) that allows for effective cleaning of scale, organic compounds, and biofilm. It also possesses a high active area (400 square feet) for more productivity without increasing the operating flux. These features offer system operators some of the best long-term economics and most trouble-free operation for RO membrane purification of fouling water.

Advantages

• Fouling resistant reducing cleaning requirements and operational cost
• Durable with good cleanability for long element life
• FilmTec performance and quality

Important Information

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.

Operation Guidelines

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.

General Information

• 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 permeate-side backpressure at all times.