SW30-2521 FilmTec 2.5 x 21" Seawater Membrane

FilmTecSKU: 513SWL-002


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Industry standard 2.5" diameter x 21" length, high efficiency seawater membrane. This size is commonly found as a short membrane in marine watermakers from brands including Spectra, Stella, Selmar, FCI & Schenker. Ideal replacement membrane to keep your system operating efficiently.


  • Dupont (Dow) FilmTec SW30-2521 reverse osmosis membrane
  • Industry standard for reliable operation
  • Spiral-wound element with polyamide thin-film composite membrane
  • Ideal for small marine and yacht desalination systems & watermakers
  • Durable fiberglass shell
  • High flow rate, high salt rejection
  • May also be operated at a lower pressure to reduce pump size, cost, and operating expenses


Membrane Type: Polyamide Thin-Film Composite
Diameter: 2.4" (61mm) 
Length: 21" (533mm)
Stabilised Salt Rejection: 99.4%
Permeate Flow Rate: 1.1m ³/day
Max. Feed Flow Rate:
Max. Operating Pressure: 69bar
Max. Operating Temperature: 45°C
Max. Pressure Drop: 1bar
pH. Range (Continuous Cleaning): 2 - 11
pH. Range (Short-Term Cleaning): 1 - 13
Maximum Feed Silt Density Index: SDI 5
Free Chlorine Tolerance: <0.1 ppm
Manufacturer Part Number: 80734
Model Number: SW30-2521

Data Sheets

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