There are a variety of materials used for evaporative cooling equipment, like cooling towers. Some common choices include galvanized steel, 304 stainless steel, and 316 stainless steel. Each material has different corrosion resistance properties; thus, the makeup water quality will affect decisions about material of construction. 

 Water quality is not the only factor affecting the material of construction, but it should be taken into consideration. Water treatment programs are necessary for maximizing heat transfer efficiency and the cooling equipment’s service life. Choosing an effective water treatment system and the best material of construction will vary for each application. However, there is some empirical data that can be referred to when making this decision.  

 The following data shows the recommendation of recirculated water properties based on the material of construction. The water treatment program should be selected based on makeup water quality and the materials of construction present in the system, at a minimum.

Makeup Water Quality Chart



For additional assistance selecting the best material of construction for your project, please contact your local EVAPCO sales representative.