DuPont
XLE-4021 DuPont FilmTec™ 1,025 GPD at 100 PSI 4 x 21 inch Membranes
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DuPont FilmTec™ XLE-4021 Extra Low Energy RO Element
Product Description
The DuPont FilmTec™ XLE-4021 is a specialized, tape-wrapped Extra Low Energy (XLE) Reverse Osmosis element, engineered for commercial systems that require high-quality permeate while minimizing operating costs. Operating at the industry's lowest applied pressure of just 100 PSI, this element significantly reduces energy consumption and allows for the use of less expensive system components.
The element delivers a nominal permeate flow of 1,025 Gallons Per Day (GPD) with a stabilized salt rejection of 99.0% (tested against 500 ppm NaCl). The XLE-4021 is the ideal choice for commercial water treatment systems, food service, hospitality, and medical applications where reliable performance, high salt rejection, and cost-efficient operation are essential.
Specifications Table
| Characteristic | Specification | Units / Notes |
| Model | XLE-4021 | Extra Low Energy RO (XLE) |
| Manufacturer | DuPont FilmTec™ | - |
| Membrane Type | Polyamide Thin-Film Composite | TFC |
| Element Dimensions (Nominal) | 4.0×21 | inches |
| Active Area | 36 (3.3) | sq ft (sq m) |
| Permeate Flow Rate (Nominal) | 1,025 (3.9) | GPD (m³/day). ±20% tolerance |
| Stabilized Salt Rejection | 99.0 | % |
| Applied Pressure (Test) | 100 (6.9) | PSI (Bar) |
| Max Operating Pressure | 600 (41) | PSI (Bar) |
| Max Feed Flow Rate | 14 (3.2) | GPM (m³/hr) |
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