DM (Demineralization) Water Plant

DM water should have a total mass concentration of salt of 1 mg/dm3 or less, a mass concentration of chloride ions of 0.05 mg/dm3 or less, a pH of 6.5–7.0, and a total dry residue of less than 2 mg/dm3. 

The storage capacity for the feed water tank, degassed water tank, demineralized water tank, and acid and alkali tank should be clearly defined in the plant’s specifications. 

The most common types of resin used in DM water plants are cation-exchange and anion-exchange resins. 

There are various types of DM water plants available, including single RO systems, double RO systems, and systems with cation and anion resin, a middle tank, and a mixed bed. 

DM water plants typically include cation exchange, anion exchange, and mixed bed columns, along with regeneration tanks.