DuPont FilmTec™ XLE-440i Low-Energy Reverse Osmosis Membrane Element
Offers good salt-rejection with extraordinary lower energy consumption. Built on a durable polyamide thin-film composite membrane, the XLE-440i is engineered by DuPont Water Solutions for reliable, long-term performance in energy-efficient brackish water treatment.
📄 Download the DuPont Product Datasheet (PDF)
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | DuPont Water Solutions (FilmTec™) |
| Element Size | 8" x 40" |
| Membrane Type | Polyamide Thin-Film Composite |
| Active Membrane Area | 440 ft2 (41 m2) |
| Permeate Flow Rate | 14,000 gpd (53 m3/d) |
| Stabilized Salt Rejection | 99.0% |
| Minimum Salt Rejection | 97.0% |
| Shipping Weight | ~35 lbs (boxed) |
| Shipping Dimensions | 10" × 44" × 10" (boxed W × L × D) |
| HS Code (Tariff) | 8421.21.0000 — water filtering/purifying apparatus |
| Warranty | 1-Year materials & workmanship; 3-Year prorated performance warranty from DuPont (commercial elements, per DuPont conditions) |
Operating & Limiting Conditions
| Parameter | Limit |
|---|---|
| Maximum Operating Temperature | 113°F (45°C) |
| Maximum Operating Pressure | 600 psi (41 bar) |
| Maximum Pressure Drop | 15 psi (1.0 bar) per element; 50 psi (3.5 bar) per pressure vessel (minimum 4 elements) |
| Maximum Feed Flow Rate | 75 gpm (17 m3/h) |
| Maximum Feed Silt Density Index (SDI) | SDI 5 |
| Free Chlorine Tolerance | < 0.1 ppm |
| pH Range — Continuous Operation | 2 - 11 |
| pH Range — Short-Term Cleaning | 1 - 13 |
Physical Dimensions
| Dimension | Value |
|---|---|
| Overall Length | 40.0 in (1,016 mm) |
| Outer Diameter | 7.9 in (201 mm) |
| Permeate Tube | 1.125 in ID (29 mm) |
| Fits Pressure Vessel | nominal 8-inch I.D. |
Performance based on DuPont standard test conditions: 2,000 ppm NaCl, 125 psi (8.6 bar), 77°F (25°C), pH 8 and 15% recovery. Individual element flow may vary. Reference: official DuPont Product Data Sheet.
Typical Applications
- Municipal drinking water
- Industrial Utility Water
- Energy-efficient brackish water treatment
- Low-pressure / cold-water RO systems
- Industrial process water
- Municipal water purification
Frequently Asked Questions
What is the DuPont FilmTec XLE-440I?
It is a 8" x 40" low-energy reverse osmosis membrane element from DuPont Water Solutions, producing up to 14,000 gpd (53 m3/d) at 99.0% rejection.
What is the rated flow?
Up to 14,000 gpd (53 m3/d) at DuPont standard test conditions (2,000 ppm NaCl, 125 psi (8.6 bar), 77°F (25°C), pH 8 and 15% recovery).
What rejection does it achieve?
99.0% stabilized, 97.0% minimum.
What pressure vessel does it fit?
A nominal 8-inch I.D. RO pressure vessel.
What is the price of the XLE-440I?
Contact ForeverPure at 408-969-2688 or sales@foreverpureplace.com for current pricing and availability.
