SW30-2521 FilmTec 2.5 x 21″ Seawater Membrane

FilmTec SW30-2521 Seawater RO Membrane

The FilmTec SW30-2521 Reverse Osmosis Membrane is a high-efficiency solution for seawater desalination in marine watermakers, yachts, and compact desalination systems. With its industry-standard 2.5″ x 21″ size, it’s the ideal replacement membrane for top brands like Spectra, Stella, Selmar, FCI, and Schenker.

Built with polyamide thin-film composite spiral-wound technology, the SW30-2521 offers 99.4% salt rejection, reliable freshwater output, and long service life under harsh marine conditions. Its fiberglass shell provides durability, while the ability to run at lower pressures reduces pump size, cost, and energy use.

Key Features

• Dupont (Dow) FilmTec SW30-2521 seawater RO membrane

• High salt rejection (99.4%) for pure freshwater

• Perfect for yacht and small marine desalination systems

• High flow performance with optimized energy use

• Rugged fiberglass shell for durability

• Compatible with multiple leading marine watermakers

Specifications

• Application: Seawater desalination

• Type: Polyamide Thin-Film Composite (TFC)

• Dimensions: 2.4″ (61mm) x 21″ (533mm)

• Salt Rejection: 99.4%

• Permeate Flow Rate: 1.1 m³/day

• Max. Feed Flow Rate: 1.4 m³/hr

• Max. Operating Pressure: 69 bar

• Operating Temp. (Max.): 45°C

• pH Range (Continuous): 2 – 11

• pH Range (Cleaning): 1 – 13

• SDI Tolerance: ≤ 5

• Free Chlorine Tolerance: <0.1 ppm

• Model: SW30-2521 | Part No. 80734

Why Choose FilmTec?

Trusted globally, FilmTec membranes are known for consistent performance, durability, and energy efficiency, making them the preferred choice for reliable marine and offshore desalination systems.