Process water covers the wide range of boiler feed water, cooling water for heat exchangers or engine, chemicals dilution, etc…
It should typically have a conductivity ranging from 0.1 to 50 us/cm, with little to no hardness to avoid scaling in heating system.
Oxygen and carbon dioxide should be removed to prevent corrosion.
Tap water or fresh ground water is the most widely used source of water to produce process water.
Once dematerialized, process water should be conditioned according to manufacturers specification, usually up to pH 9 by adding caustic soda or ammonia.