In water treatment operations, different processes are carried out in order to obtain a product that complies with the stringent health and legal legislation of each country.

Even though water is the main element of the whole process and the main fluid used, the difficulties posed in sealing it are just as challenging as in other sectors.

During the different treatments to which water is subject, the mechanical seals may come into contact with sediments, organic matter, dissolved substances such as calcium and magnesium (hard water), sulphate and carbon dioxide (acid water), manganese (sewage water), nitrates (water contaminated by fertilizers), etc.

Although standard seals are often sufficient for most applications in this (supplying freshwater or transporting wastewater), in other cases the design of the mechanical seal and the materials must be carefully designed.