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DOW Filmtec LE-400 RO Membrane 11500 GPD

DOW Filmtec LE-400 RO Membrane 11,500 GPD , DWC25
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Brand: DOW Filmtec
Price: $850.00

As Low As $24 Per Month details

Dimensions: 8" x 40"
Weight: 5 lb

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Made in USA

DOW Filmtec LE-400 RO Membrane 11,500 GPD, a 8" x 40" brackish water Reverse Osmosis Membrane that can provide RO quality water up to 11,500 gallons per day at a 15% recovery rate. It can operate at feed pressures ranging from 150 psi to 600 psi with 99.3% salt rejection. This element offers the highest quality water for large regular and brackish water treatment systems. This membrane element features the thickest feed spacer (34 mil) available in the industry today to lessen the impact of fouling as well as a fiberglass shell.

Discontinued product, replaced by BW30XFRLE-400/34 or BW30XFRLE-400/34i .

Filmtec RO elements separate salts from water and are produced with an automated fabrication process for precision, consistency, and reliability offering high rejection of dissolved solids and organics and operate very efficiently at lower pressures. These Thin Film-Commercial RO membranes have a hard shell exterior making them suitable and recommended for systems with multiple-element housings containing three or more membranes, as they are designed to withstand higher pressure drops. In addition to the highest quality water and the lowest energy costs, DOW membranes also deliver savings by providing the industry’s longest lasting and most reliable performance membranes due to increased resistance to fouling.

These DOW FILMTEC LE400 membranes are used in wide variety of industrial and municipal water treatment applications. Its advanced technological design is manufactured for excellent structural stability and more productivity than other elements.

Key Features and Benefits:

DOW Filmtec genuine membranes
  • 11,500 Gallons per day.
  • The new Filmtec LE-400 has an industry standard 1.125 ID permeate tube for easy element replacement.
  • 150 psi operating pressure, 40% lower than standard membranes
  • Reduce wastewater volumes by increasing water reuse.
  • High performance at low pressure resulting in less energy usage and lower costs.
  • DOW FilmTec high quality, long lasting and reliable performance.


Manufacturer ID(Part#):LE-400 ( DOW Part# 249109 ) , replaced BW30LE-440
LE-400 (DC) replaced by BW30XRFLE-400/34
Dimensions(Diameter x Length):8" x 40" (actual 7.9" x 40")
Stabilized Salt Rejection:99.3%
Permeate Flow Rate(Gallons per Day, gpd):11,500 gpd (1813 lt/h or 43,500 L/Day or 44 m3/day) *
Maximum Feed Flow Rate(Gallons per Minute, gpm):85 gpm (19 m3/h)
Applied Pressure(psi):150 psi (10.3 bar)
Maximum Operating Pressure(psi):600 psi (41 bar)
Salt Rejection Based On Feed (ppm):2000 ppm (NaCl)
Maximum Operating Temperature(°F):113°F (45°C)
pH Range, Continuous Operation:2 - 11 **
pH Range, Short-Term Cleaning:1 - 13
Maximum Feed Silt Density Index(SDI):SDI 5
Free Chlorine Tolerance(ppm):< 0.1 ppm ***
Membrane Style:Drop-in Element
Membrane Material:Polyamide Thin-Film Composite
Active Area:78 sq. ft.
Outer Wrap:Hard fiberglass outer shell
Housing/Pressure Vessel Size(inch):4 inch
* Permeate flow rate and salt rejection based on the following test conditions: 2000 ppm NaCl, 150 psi (10.3 bar), 77°F(25°C), 15% recovery. Permeate flow rates for individual elements may vary +/-20%.
**Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
*** 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, Dow recommends removing residual free chlorine by pretreatment prior to membrane exposure. Most RO systems have carbon pre-filters for this purpose.

- LE-400 replaces BW300-400 and BW30LE-400.
- Proper start-up of reverse osmosis water treatment system is essential to prepare the industrial membrane elements for operating service and to prevent membrane damage due to overfeeding or hydraulic shock.
- Before initiating system start-up procedures, membrane pre-treatment, loading of the membrane elements, instrument calibration and other system checks should be completed.
- During prolonged system shutdowns, it is recommended that the Dow Filmtec membrane elements be immersed in a preservative solution. This is to prevent biological growth.
- (To ensure proper product startup and usage, please review Operation Guidelines and General Information section from the Product Data Sheet.)

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