HCTI
Replaces SW30-2521 DuPont FilmTec 300 GPD at 800 PSI 2.5 x 21 inch 99.7% Rejection Seawater Membranes
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HCTI 2.5" x 21" Seawater RO Membrane (SW30-2521 Compatible, 300 GPD)
Engineered as a premium, direct-fit alternative for the SW30-2521, this compact seawater reverse osmosis element delivers exceptional saltwater purification for marine vessels, offshore platforms, and coastal desalination systems requiring a highly reliable watermaker component. Proudly manufactured in the United States by Hydrocomponents & Technologies Inc. (HCTI), this professional-grade membrane utilizes advanced thin-film composite (TFC) technology to effectively remove high levels of salinity, dissolved solids, and boron from harsh seawater feeds.
Designed to seamlessly drop into standard 2.5-inch by 21-inch commercial pressure vessels equipped for SW30-2521 elements, this robust membrane is specifically built to withstand the rigors of marine environments. Evaluated under stringent standard test conditions at an applied pressure of 800 PSI (with a heavy 32,000 ppm TDS feed solution), it produces a dependable nominal permeate flow rate of 300 gallons per day (GPD) while maintaining an outstanding 99.70% nominal salt rejection rate. Its high-purity yield and space-saving physical profile make it an exceptional, highly reliable solution for onboard marine watermakers, compact coastal desalination rigs, and specialized high-salinity industrial water treatment systems.
| Specification | Details | Notes |
| Manufacturer | HCTI (Hydrocomponents & Technologies Inc.) | Made in the USA |
| Primary Compatibility | SW30-2521 | Premium direct-fit replacement |
| Membrane Type | Seawater Reverse Osmosis (RO) | Thin-Film Composite (TFC) |
| Nominal Size | 2.5" x 21" | Compact commercial footprint |
| Permeate Flow Rate | 300 GPD | Measured under standard test conditions |
| Nominal Salt Rejection | 99.70% | High purity removal rate |
| Minimum Salt Rejection | 99.40% | |
| Boron Rejection | 93.0% | |
| Test PSI (Applied Pressure) | 800 PSI (5.5 MPa) | Standard test conditions |
| Test Feed Concentration | 32,000 ppm TDS | Evaluated at 77°F (25°C) |
| Recovery Rate | 15% | |
| Primary Applications | Marine Watermakers, Coastal Desalination | Ideal for high-salinity feeds |
Non-OEM Compatibility: This product is a high-quality, non-OEM compatible replacement membrane designed to function as an alternative to original manufacturer components. While engineered for direct fit and functional compatibility, specific performance metrics and technical specifications—including, but not limited to, permeate flow rate (GPD), operating pressure (PSI), and salt rejection percentages—may vary from the exact specifications of the original OEM target model. It is the customer's sole responsibility to cross-reference these specifications with the original part to ensure the replacement meets their specific operating requirements prior to purchase and installation. All brand names, part numbers, and logos are the property of their respective owners and are used solely for identification and cross-reference purposes. This product is not affiliated with, endorsed by, or sponsored by any original equipment manufacturer.
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