HCTI
Replaces SW30-2521 DuPont FilmTec 300 GPD at 800 PSI 2.5 x 21 inch Watermaker Seawater Desalination Machine Membranes
Replaces SW30-2521 DuPont FilmTec 300 GPD at 800 PSI 2.5 x 21 inch Watermaker Seawater Desalination Machine Membranes
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HCTI MEM-2521SW-HF Seawater RO Membrane (300 GPD)
For marine vessels, offshore platforms, and coastal desalination systems requiring a compact and highly reliable watermaker component, the HCTI MEM-2521SW-HF delivers exceptional saltwater purification. Manufactured in the United States by Hydrocomponents & Technologies Inc. (HCTI), this professional-grade seawater reverse osmosis element 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 fit standard 2.5-inch by 21-inch commercial pressure vessels, this robust membrane is engineered for 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), the MEM-2521SW-HF 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, cost-effective 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.) | |
| Model Number | MEM-2521SW-HF | |
| Membrane Type | Seawater Reverse Osmosis (RO) | Thin-Film Composite (TFC) |
| Origin | Made in the United States | |
| 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 |
Product Disclaimer & Limitation of Liability
Product Disclaimer & Limitation of Liability
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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Manufacturer Updates & Official Specifications:
Manufacturers frequently revise product designs, component materials, and technical specifications without prior notice. Official manufacturer documentation and data sheets are the sole authoritative sources for all product specifications and strictly supersede any physical dimensions, specifications, or visual representations presented on this page. It is the customer's sole responsibility to independently verify all technical data—including but not limited to pressure ratings, dimensions, material compatibility, and performance metrics—against the official manufacturer data sheet prior to purchase and installation.
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It is the buyer's sole responsibility to independently verify that the exact manufacturer part number being ordered is correct and entirely compatible with their specific application prior to checkout. By placing an order, you explicitly agree that if the physical item shipped perfectly matches the manufacturer part number listed on your official invoice, the order is legally considered fulfilled as described. Disputes or chargebacks claiming an item is "Not as Described" based on supplementary website text, specification tables, AI-generated content, or compatibility assumptions will not be recognized or honored.
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All prices, promotional offers, and inventory statuses are subject to change without notice. In the event a product is listed at an incorrect price or with inaccurate stock availability due to a typographical, technical, or system error, we reserve the right to refuse or cancel any orders placed for that item. If an order is canceled after your payment has been processed, a full refund will be initiated immediately to your original payment method.
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