Filmtec SW30-2521


SW30-2521 Dow Filmtec Reverse Osmosis Sea Water Membrane Element, Watermaker Membrane

Filmtec SW30-2521 is a standard size seawater membrane, widely used for watermakers, desalinators, seawater desalination systems, marine (yacht and boat), Navy and martime applications.
Commonly used in on-board Watermakers to create drinking water from seawater for yachts, boats, and cruise ships


Watermaker Membrane Replacement, Can Replace Models:

  • Spectra Ventura FT-MB-20., (Short membrane of Spectra Catalina 300)
  • Most Watermakers: Stella watermaker, Selmar water maker, FCI watermaker parts, Schenker watermaker parts … etc.
  • Industry-Standard 2.5×21 size seawater RO membranes.


Manufactured by DOW, USA.
Free Shipping Australia & New Zealand, Best seawater membrane price.


Improved FILMTEC SW30 2521 seawater reverse osmosis membranes offer the highest productivity while maintaining excellent salt rejection.

FILMTEC SW30-2521 RO membrane elements have the highest flow rates available to meet the water demands of both sea-based and land-based desalinators.

FILMTEC SW30-2521 reverse osmosis membranes may also be operated at lower pressure to reduce pump size, cost and operating expenses.

Improved SW30-2521 FILMTEC seawater RO membrane combined with automated, precision element fabrication result in the most consistent product performance available.

DOW FILMTEC SW30-2521 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant..



  • Product Name: SW30-2521
  • Applied Pressure psig (bar): 800 (55)
  • Permeate Flow Rate gpd (m³/d): 300 (1.1)
  • Stabilized Salt Rejection: 99.4%
  • Maximum Feed Flow Rate gpm (m³/h): 6 (1.4)
  • Size: 2.4″ x 21″ inch
  • SW30-2521 elements fit nominal 2.5 inch I.D. pressure vessels
  • SW302521 Membrane Type: polyamide thin film composite
  • Maximum Operating Temperature: 113°F (45°C)
  • Maximum Operating Pressure: 1,000 psi (69 bar)
  • Maximum Pressure Drop: 15 psig (1.0 bar)
  • pH Range, Continuous Operations: 2 – 11 pH Range, Short-Term Cleaning: 1 – 13
  • Maximum Feed Silt Density Index: SDI 5
  • Free Chlorine Tolerance < 0.1 ppm 
  • Maximum temperature for continuous operation above pH10 is 95°F (35°C)

SW30 2521 Datasheet

SW30-2521 Filmtec Equivalents: Hydranautics SWC-2521 / CSM RE2521-SHF

Additional information

Weight 1.1 kg
Dimensions 60 × 9 × 9 cm


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