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In membrane filtration today, polymers like poly(ether)sulfones, polysiloxanes, and polyamides are the most common materials used to create the barrier and achieve the separation. Membranes with different pore sizes are available for different particles.
An overview of membrane filtration classification and the contaminants that can be removed by microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO):
| Removable Particles | PORE SIZE | |
| MF | Pollen, Asbestos, Bacteria, Cells | 0.1 - 1 µm |
| UF | Virus, Colloidals, Emulsions, Turbidity |
5 - 100 nm |
| NF | Vitamins, Sugars, Colour |
1 - 5 nm |
| RO | Salts, small organic substances | 0.1 - 1 nm |
Separation in RO is achieved by applying a pressure on the contaminated solution that is higher than its osmotic pressure. This makes it possible to remove ions from water and, for example, desalinate seawater under pressures between 60 and 80 bar (870 to 1160 psi).
If you have any questions, please contact us.
FILTRATION SPECTRUM
Learn all about our filtration spectrum on the filtration spectrum page.
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Pentair Releases New Pentair X-Flow XF75 Membrane Element
New Ultrafiltration Element Delivers More Surface Area in a Smaller Footprint LONDON, United Kingdom (August 31st, 2020) – Global water treatment company Pentair announces the latest innovati...
Name changes
From July 1, 2020, we are repositioning X-Flow product offerings as we deliver both the membrane solution and the necessary know-how to our business partners. At X-Flow, we uniquely combine hig...
X-Flow solutions
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