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Derma Protect + Innovation GmbH
Division Metalworking

Siemensstrasse 6
88048 Friedrichshafen
Tel.: +49 (0)7541-591224
Fax: +49 (0)7541-591225

ISO 9001 farbe en

The natural process of osmosis can be reversed by pressure and used for an environmentally friendly form of water desalination. If a higher-concentration salt solution, which is separated from a lower-concentration salt solution by a semi-permeable membrane, is pressurised to a level above the osmotic pressure of this solution, pure water flows through the semi-permeable membrane - pure water is produced. Particles and bacteria are removed by > 99%.
The pure water performance of reverse osmosis is temperature-dependent. Our performance parameters refer to a water temperature of 15°C. Per °C, the performance of the RO decreases by 3%, therefore the temperature specification is an important comparison criterion for the efficiency and economy of the system. It should also be noted that there are membranes with different efficiencies in principle (98% or only 95%). A theoretical initial conductivity of e.g. 500 µS/cm results in a theoretical residual conductivity of 10 µS/cm compared to 20 µS/cm, which would already be too much for e.g. EDM systems. For absolutely pure water, an ion exchanger cartridge can additionally be connected downstream, so that theoretically a residual conductivity of zero can be achieved.
We will be happy to advise you on which system is best suited to your needs.