DuPont FilmTec™ Seamaxx-440i Element Seawater Reverse Osmosis Membrane Element
Seawater extra low energy RO membrane delivering very high permeate flow for considerable energy savings, with iLEC interlocking end caps reducing operating costs and O-ring leak risk. Built on a durable polyamide thin-film composite membrane, the Seamaxx-440i Element is engineered by DuPont Water Solutions for reliable, long-term performance in seawater desalination and high-salinity water treatment.
📄 Download the DuPont Product Datasheet (PDF)
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | DuPont Water Solutions (FilmTec™) |
| Element Size | 8-inch |
| Membrane Type | Polyamide Thin-Film Composite |
| Active Membrane Area | 440 ft2 (41 m2) |
| Permeate Flow Rate | 9,050 gpd (34.2 m3/d) |
| Stabilized Salt Rejection | 99.47% |
| Minimum Salt Rejection | 99.25% |
| 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 | 113F (45C) |
| Maximum Operating Pressure | 1,200 psi (83 bar) |
| Maximum Pressure Drop | 15 psi (1.0 bar) per element; 50 psi (3.5 bar) per pressure vessel (minimum 4 elements) |
| 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 | standard RO pressure vessel |
Performance based on DuPont standard test conditions: Permeate flow and salt rejection based on the following standard conditions: 32,000 ppm NaCl, 5 ppm boron, 600 psi (41 bar), 77F (25C), pH 8, 8% recovery.. Individual element flow may vary. Reference: official DuPont Product Data Sheet.
Typical Applications
- Seawater desalination for municipal and industrial applications
- Suitable for low and medium feed water salinity
- Ideal for installations with high energy cost
- Applicable for optimized Internally Staged Designs (ISD) in combination with other FilmTec seawater membranes
- Seawater reverse osmosis (SWRO) desalination
- Marine and offshore watermakers
- High-salinity industrial feed water
- Internally Staged Design (ISD) seawater trains
Frequently Asked Questions
What is the DuPont FilmTec SEAMAXX-440I?
It is a 8-inch seawater reverse osmosis membrane element from DuPont Water Solutions, producing up to 9,050 gpd (34.2 m3/d) at 99.47% rejection.
What is the rated flow?
Up to 9,050 gpd (34.2 m3/d) at DuPont standard test conditions (Permeate flow and salt rejection based on the following standard conditions: 32,000 ppm NaCl, 5 ppm boron, 600 psi (41 bar), 77F (25C), pH 8, 8% recovery.).
What rejection does it achieve?
99.47% stabilized, 99.25% minimum.
What pressure vessel does it fit?
A standard RO pressure vessel RO pressure vessel.
What is the price of the SEAMAXX-440I?
Contact ForeverPure at 408-969-2688 or sales@foreverpureplace.com for current pricing and availability.
