DuPont
Seamaxx™–440i DuPont FilmTec Membranes
Seamaxx™–440i DuPont FilmTec Membranes
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Seamaxx™–440i DuPont FilmTec Membranes
DuPont FilmTec Seamaxx™-440i Extra Low Energy SWRO Membrane
The DuPont FilmTec Seamaxx™-440i is a professional-grade, extra low energy seawater reverse osmosis (SWRO) membrane engineered for maximum energy efficiency in industrial desalination systems. Designed for standard 8-inch by 40-inch pressure vessels, this element utilizes advanced polyamide thin-film composite technology to deliver an exceptionally high permeate flow. By operating effectively at significantly reduced feed pressures, it provides substantial savings in energy consumption and lowers overall system capital costs, making it an ideal solution for facilities processing low-to-medium salinity seawater or high-salinity brackish water.
Built for continuous, heavy-duty operation, the Seamaxx-440i features an expansive 440 square foot active membrane area paired with a 28-mil feed spacer, which balances low differential pressure with excellent cleaning efficiency. To ensure secure installations and reduce system operating costs, this model includes proprietary iLEC™ interlocking endcaps that minimize the risk of O-ring leaks. Due to its extraordinarily high permeability, it is evaluated at a specialized standard test pressure of 600 PSI, where it produces a nominal flow rate of 9,050 gallons per day (GPD) alongside a stabilized salt rejection rate of 99.47%. Engineered for demanding environments, it can safely withstand a maximum operating pressure of 1,200 PSI, providing an optimal combination of extreme efficiency and high-purity output.
| Specification | Details |
| Model Number | Seamaxx-440i (Seamaxx™-440i) |
| Manufacturer | DuPont Water Solutions (FilmTec) |
| Membrane Type | Seawater Extra Low Energy RO (Polyamide TFC) |
| Endcap Technology | iLEC™ Interlocking Endcaps |
| Nominal Size | 8.0" x 40" |
| Active Surface Area | 440 ft² (41 m²) |
| Permeate Flow Rate | 9,050 GPD (34.2 m³/d) |
| Stabilized Salt Rejection | 99.47% |
| Feed Spacer Thickness | 28 mil |
| Max Operating Pressure | 1,200 PSI (83 bar) |
| Test PSI (Applied Pressure) | 600 PSI (41 bar) |
| Max Operating Temp | 113°F (45°C) |
| Free Chlorine Tolerance | < 0.1 ppm |
| Max Feed Silt Density Index | SDI 5 |
| Test Conditions | 32,000 ppm NaCl, 5 ppm Boron, 600 PSI, 77°F (25°C), pH 8.0, 8% Recovery |
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