DUPONT DOW MEMBRANE-BW30HRLE-440

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   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.

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   Reverse Osmosis and Nanofiltration Three-Year Prorated Limited Warranty   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 Stewardship

has a fundamental concern for all who make, distribute, and use its products, and for the environment in which we live. This concern is the basis for our product stewardship philosophy by which we assess the safety, health, and environmental information on our products and then take appropriate steps to protect employee and public health and our environment. The success of our product stewardship program rests with each and every individual involved with products—from the initial concept and research, to manufacture, use, sale, disposal, and recycle of each product.

Customer Notice

strongly encourages its customers to review both their manufacturing processes and their applications of products from the standpoint of human health and environmental quality to ensure that products are not used in ways for which they are not intended or tested. personnel are available to answer your questions and to provide reasonable technical support. product literature, including safety data sheets, should be consulted prior to use of products. Current safety data sheets are available from DuPont.

Please be aware of the following:

The use of this product in and of itself does not necessarily guarantee the removal of cysts and pathogens from water. Effective cyst and pathogen reduction is dependent on the complete system design and on the operation and maintenance of the system.

Permeate obtained from the first hour of operation should be discarded.

Regulatory Note

This product may be subject to drinking water application restrictions in some countries; please check the application status before use and sale.