Reverse osmosis is the process of forcing solvent molecules from an area of high solute concentration to a lower solute concentration by applying pressure which is greater than the osmotic pressure. Reverse osmosis is carried out with a membrane that retains the solute on one side, in order to obtain the pure solvent on the other.
Reverse osmosis plants are used to demineralise water with a high salt content, such as seawater, or water from rivers or wells, and use it to replenish various circuits.
The size of plants made by Ravagnan ranges from 2 m3/h to over 1200 m3/h.