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WaterSolutions DOW FILMTEC LE-440i


The DOW™ FILMTEC™ LE-440i element is a low-energy element featuring the highest active membrane area available in the industry today. It enables high productivity and low-energy operation, while maintaining high-rejection performance, minimizing operating expense and lowering the total cost of water for industrial and municipal applications.

  • Delivers the same permeate flow at an equivalent operating flux at 40% lower feed pressure, compared to the DOW FILMTEC BW30-440i element.
  • Offers permeate flow rate 10 percent higher while producing similar permeate quality than that of the DOW FILMTEC LE-400 element, enabling the lowest total cost of water in high-purity industrial applications.
  • Includes iLEC™ interlocking endcaps, which reduce system operating costs and the risk of o-ring leaks that cause poor water quality.
  • Designed using an industry standard 1.125 inch ID permeate tube for interchangeability with other brackish water elements.

 

Nominal Active Surface Area
ft2 (m2)		 Permeate Flow Rate
gpd (m3/d)		 Stabilized Salt Rejection
(%)		 Minimum Salt Rejection
(%)
440 (41) 12,650 (48) 99.3 99.0
  1. Permeate flow and salt rejection based on the following test conditions: 2000 ppm NaCl, 150 psi (10.3 bar), 77°F (25°C), pH 8 and 15% recovery.
  2. Flow rates for individual elements may vary, but will be no more than 15% below the value shown.
  3. Sales specifications may vary as design revisions take place.
  4. Active area guaranteed +/-3%. Active area as stated by Dow is not comparable to nominal membrane area often stated by some manufacturers. Measurement method described in Form No. 609-00434 (168KB PDF).
  5. For comparison, the LE-440i will have a permeate flow of 13,400 gpd (51 m3/d) and stabilized salt rejection of 99.3% when normalized to a feed solution of 1,500 ppm NaCl as used by some manufacturers.

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Technical Documents
Product Datasheet (PDF)
English (78KB) | Chinese (257KB) | Français (78 KB)

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