Description

Description FilmTec™ Reverse Osmosis (RO) Elements offer the highest quality water for small
commercial systems purifying less than one gallon per minute (0.2 m3
/d) of RO water.
l FilmTec™ Membranes are available in a variety of sizes to meet a wide range
of space requirements.
l FilmTec™ XLE extra low energy elements operate at the lowest pressure in the
industry, resulting in lower energy costs and enabling system builders to use
lower cost components.
l In addition to the highest quality water and the lowest energy costs, FilmTec™
Membranes also deliver savings by providing the industry’s longest-lasting and
most reliable performance.

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 an 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 the 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 limited warranty 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 30 psi (2.1
bar).
l Avoid static permeate-side backpressure at all times.
Product
Stewardship

DuPont 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 DuPont products—from the initial concept and research to
the manufacture, use, sale, disposal, and recycling of each product.

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