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Product Data Sheet

FilmTec™ Membranes LC LE-4040

Large Commercial 4040 Reverse Osmosis Elements

LC LE-4040 Description

FilmTec™ LC 4040 product range are available to meet a wide variety of customer needs in commercial applications, from producing high purity water to delivering low total system costs.DOW fully automated element production enables the most consistent products in the industry that minimizes the total cost of ownership of water treatment systems.

LC HR-4040 produces high quality water with our state of the art RO membrane.

LC LE-4040 delivers high quality water at low pressure at harsh water conditions, usingDOW innovative,

proprietary technology for low energy applications.

LC LE-4040 Product Type

Spiral-wound element with polyamide thin-film composite membrane

LC LE-4040 Typical Properties

Permeate flow and salt rejection based on the following test conditions: 2000 ppm NaCl, 77°F (25°C), 15% recovery, pH 8, and applied pressure 225 psig for LC HR and 125 psig for LC LE.

Permeate flows for individual elements may vary +/-15%.

For the purpose of improvement, specifications may be updated periodically.

Element Dimensions

Refer to FilmTec™ Design Guidelines for multiple-element systems of midsize elements

(Form No. 45-D01588-en).

LC HR-4040 and LC HRLE-4040 Elements fit nominal 4-inch I.D. pressure vessel.

LC LE-4040 Operating and Cleaning Limits

Membrane type Polyamide Thin-Film Composite

Maximum operating temperaturea 113°F (45°C)

Maximum operating pressure 600 psig (41 bar)

Maximum pressure drop 15 psig (1.0 bar)

Maximum feed flow rate, gpm (m3/h) 16 gpm (3.6 (m3/h)) pH range

Continuous operationa 2 - 11

Short-term cleaningb 1 – 13

Maximum Feed Silt Density Index SDI 5

Free chlorine concentrationc < 0.1 ppm

LC LE-4040 General Information

LC LE-4040 Operation Guidelines

Maximum temperature for continuous operation above pH 10 is 95°F (35°C).

Refer to Cleaning Guidelines (Form No. 45-D01696-en).

Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, DuPont recommends removing residual free chlorine and other oxidants by pretreatment prior to membrane exposure. Please refer to Dechlorinating Feedwater (Form No. 45-D01569-en) for more 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.

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.

LC LE-4040 Important Information

Keep elements moist at all times after initial wetting.

If operating limits and guidelines given in this Product Bulletin are not strictly followed, the limited warranty in Form No. 45-D00903-en will be null and void.

To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a storage 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.

LC LE-4040 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 manufacture, use, sale, disposal, and recycle of each product.