A Demineralised DM Plant removes metal ions from water. Natural water contains ions called anions, such as chloride and sulphate, and cations, including iron, calcium, sodium, and copper. A DM plant is beneficial for many reasons, including preventing the oxidation of metals and the formation of scale on metal surfaces. The process involves a series of processes that eliminates ions.

DM plants are typically designed to remove mineral salts from water. DM plants can remove up to 30 ppm TDS at the outlet depending on the raw water TDS. The plant can also remove organic materials, such as sediments. A DM plant will reduce the overall cost of products produced by industrial manufacturing units. In addition to producing water of higher quality, a DM plant also lowers the cost of the finished product.