Description

Description The FilmTec™ BW30-400 is the product of choice when the highest quality permeate is
required.  It was the first 400 square foot membrane element on the market and
continues to be widely used in new equipment and retrofits where system capital and
productivity are factors.
l DuPont’s superior automated manufacturing technology results in the most
consistent performance element-to-element and year-after-year.  
l FilmTec™ BW30-400 Elements deliver high flow and high rejection without
being chlorinated during the manufacturing process.  This is one reason why
FilmTec™ Elements are more durable and may be cleaned over a wider pH
range (pH 1-13) than other RO elements.
l With more than a decade of proven performance, FilmTec™ BW30-400 is the
product you can rely on for years of trouble-free operation.
Product Type Spiral-wound element with polyamide thin-film composite membrane

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. 45-D01609-en) for more information.
Operation
Guidelines
Avoid any abrupt pressure or cross-flow variations on the spiral elements during startup, 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:
l Feed pressure should be increased gradually over a 30-60 second time frame.
l Cross-flow velocity at set operating point should be achieved gradually over 15-
20 seconds.
General
Information
l Keep elements moist at all times after initial wetting.
l If operating limits and guidelines given in this bulletin are not strictly followed, the
FilmTec™ Reverse Osmosis and Nanofiltration Three-Year Prorated Limited
Warranty (Form No. 45-D00903-en) will be null and void.
l To prevent biological growth during prolonged system shutdowns, it is
recommended that membrane elements be immersed in a preservative solution.
l The customer is fully responsible for the effects of incompatible chemicals and
lubricants on elements.
l Maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4
bar).
l Avoid static permeate-side backpressure at all times.