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DOW FILMTEC Seawater Reverse Osmosis (RO) 8" Membrane Elements

FILMTEC seawater membrane delivers high boron rejection to help customers meet World Health Organization (WHO) and other drinking water standards. DOW FILMTEC seawater reverse osmosis membrane elements deliver high performance over their operating lifetime without the use of oxidative post-treatments like many competitive products. This is one reason why FILMTEC seawater membrane are more durable and may be cleaned more effectively over a wider pH range (1-13) than other RO elements. The FILMTEC seawater membrane is a premium grade seawater reverse osmosis element featuring both high active area and high salt rejection to offer the best long-term economics for seawater desalination systems.


Thin-Film Composite (TFC Membrane) design

FilmTec thin-film composite membranes (TFC membranes) are the world’s leading RO membrane for water purification systems. To date, more than 1,000,000 FilmTec membranes have been installed in water treatment systems worldwide.

FILMTEC seawater membrane is a durable, high-rejection, high-productivity seawater element for use in high fouling or challenging feedwater conditions, helping to support smooth operations and low cost of water.

FILMTEC seawater membrane are high quality reverse osmosis elements that provide high salt rejection and surface area to bring long-lasting cost-efficiency for marine desalination systems.  These membranes offer high boron rejection to satisfy the world’s freshwater standard and provide high performance for the life-span of the operation without the use of post treatments. For this reason, Filmtec membranes are considered the most durable of its kind in the available market and are capable of being cleaned more easily than other reverse osmosis membranes.

Filmtec elements are manufactured to boost the productivity of systems at low pressures, and low to high cleaning energy. The enhanced membrane make-up diminishes the energy and pressure usage beneath any other existing seawater reverse osmosis membrane. Due to this benefit, operational costs and the risk of o-ring leakages which cause bad water quality are substantially reduced. Filmtec seawater membranes are highly productive elements that provide incredible durability and high-rejection to work properly in high fouling or contaminated feedwater. This will maintain an effective and smooth operation with low cost of water.


  • Convert seawater into fresh and potable water

  • High flux reduces energy use or pressure required

  • Good rejection results in good quality water

  • FilmTec performance and quality

  • High boron rejection



Dow FilmTec Membranes

Tapwater Commercial RO

 2.5"x40” and 4"x40” membranes, TW30, XLE, LP, BW30, TW30HP

Tapwater Industrial RO

 4”x40” and 8”x40” membranes, l BW30, BW30LE, LE, XLE, FR, RO, HSRO

Seawater RO Elements

 2.5"x40”, 4”x40” and 8"x40” Seawater membranes, SW30, SW30HR, SW30HRLE

Nanofiltration Elements

 4”x40” and 8"x40” Nanofiltration membranes, NF90, NF270, NF200, NF

Semiconductor Grade

 8" Dia. Semiconductor SG, SG30

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