DOW FILMTEC™ XLE-4021 Low Energy Reverse Osmosis Membrane Element
DOW FILMTEC XLE-4021 Elements offer better system performance and economics for small commercial systems by operating at very low applied pressure. DOW FILMTEC XLE-4021 elements are tape-wrapped. In addition to high quality water and low energy costs, DOW FILMTEC membranes also deliver savings by providing long lasting and reliable performance.
DOW FILMTEC Brackish Water Reverse Osmosis Elements can separate salts from water and are produced with an automated fabrication process for precision, consistency, and reliability. DOW FILMTEC RO membranes build on a tradition of leadership in the thin-film composite membrane industry and meet the challenges of higher rejection in lower-pressure operations.
DOW FILMTEC XLE-4021 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.
 
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Specifications for XLE-4021
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FilmTec Product: |
XLE-4021 |
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FilmTec Part Number: |
154540 |
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Size (Approximate): |
4" Dia. x 21"L |
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Flow Rate: |
1,025 gpd (3.9 m³/d) |
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Applied Pressure: |
100 psig (6.9 bar) |
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Stabilized Salt Rejection: |
99.0% |
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Active Surface Area: |
36 Sq. Ft. |
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Single Element Recovery: |
8% |
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Exterior: |
Tape-Wrapped |
Membrane Type:
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Polyamide Thin-Film
Composite |
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Permeate flow and salt rejection based: 500 ppm NaCl feed stream, 77°F, 8% recovery, 100 psig.
Operating Limits for XLE-4021
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Maximum Operating Temperature: |
113°F (45°C) |
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Maximum Operating Pressure: |
600 psig (41 bar) |
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Maximum Pressure Drop: |
13 psig (0.9 bar) |
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Maximum Feed Flow Rate: |
14 gpm (3.2m³/h) |
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pH Range, Continuous Operation*: |
2-11 |
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pH Range, Short-Term Cleaning**: |
1-13 |
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Maximum Feed Silt Density Index: |
SDI 5 |
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Fere Clorine Tolerance***: |
<0.1ppm |
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*Maximum temperature for continuous operation above pH 10 is 95°F
**Refer to cleaning guidelines.
***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.
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