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XLE - 440, Reverse osmosis membrane (membrane element) Dow Filmtec Dupont
The FILMTECTM XLE-440 is an extra low energy, high productivity brackish water reverse osmosis element designed to deliver high quality water at low operating costs for municipal and industrial water applications. Its high active area design coupled with the highly productive XLE membrane makes FILMTEC XLE-440 the lowest pressure RO element – resulting in lower energy costs.
• XLE-440 will operate in many systems at less than half the feed pressure of a standard high rejection RO element and at up to 30% less pressure than other low energy membranes, resulting in lifetime energy savings greater than 100% of the initial membrane investment.
• With 440 square feet (41 square meters) of active membrane area, the FILMTEC XLE- 440 element gives system designers the option of designing a system with fewer membrane elements, requiring lower capital expenditures for membranes and compenents.
• Automated, precision fabrication allows for the industry’s highest active membrane area without compromising the thickness of the feed spacer, resulting in less fouling, less cleaning downtime and lower operating costs than competitive products using thinner spacers.
• XLE-440 is perfectly suited for cold water feeds as the element’s high productivity will deliver lower energy costs and/or higher permeate flow.
Description ...
• XLE-440 will operate in many systems at less than half the feed pressure of a standard high rejection RO element and at up to 30% less pressure than other low energy membranes, resulting in lifetime energy savings greater than 100% of the initial membrane investment.
• With 440 square feet (41 square meters) of active membrane area, the FILMTEC XLE- 440 element gives system designers the option of designing a system with fewer membrane elements, requiring lower capital expenditures for membranes and compenents.
• Automated, precision fabrication allows for the industry’s highest active membrane area without compromising the thickness of the feed spacer, resulting in less fouling, less cleaning downtime and lower operating costs than competitive products using thinner spacers.
• XLE-440 is perfectly suited for cold water feeds as the element’s high productivity will deliver lower energy costs and/or higher permeate flow.
Description ...
1099.00 €
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Product Specifications
Part Number: 101060
Nominal Active Area ft2 (m2): 440 (41)
Applied Pressure psig (bar): 100 (6.9)
Permeate Flow Rate gpd (m3/d): 12,700 (48)
Stabilized Salt Rejection: 99.0%
1. Permeate flow and salt rejection based on the following test conditions: 500 ppm NaCl, pressure specified above, 77°F (25°C) and 15% recovery. 2. Permeate flows for individual elements may vary +25/-15%.
3. Minimum stabilized salt rejection is 98.0%.
4. The above specifications are benchmark values. Please be sure to operate according to system design guidelines.
Operating Limits
• Membrane Type: Polyamide Thin-Film Composite
• Maximum Operating Temperature: 113°F (45°C)
• Maximum Operating Pressure: 600 psig (41 bar)
• Maximum Pressure Drop: 15 psig (1.0 bar)
• pH Range, Continuous Operationa: 2-11
• pH Range, Short-Term Cleaning (30 min.)b: 1-13
• Maximum Feed Silt Density Index (SDI): SDI 5
• Free Chlorine Tolerancec: <0.1 ppm
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.
• Permeateobtainedfromfirsthourofoperationshouldbediscarded.
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 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.
• Thecustomerisfullyresponsiblefortheeffectsofincompatiblechemicalsandlubricants
on elements.
• Maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4 bar).
• Avoidstaticpermeate-sidebackpressureatalltimes.
Pressure, atm .: 7
Selectivity,: 99
Productivity, m3 / day: 48
Filtering surface area, m2: 41
Filmtec XLE-440 reverse osmosis membranes manufactured by Dow Chemical (USA) provide effective water purification from a wide range of dissolved substances of both organic and inorganic origin (up to 99, 8).
They are characterized by high resistance to chemical compounds, stable structure, low energy consumption and provide higher performance compared to analogues.
