Mixed‐Bed and Multiple‐Bed Demineralizing Systems

1937, over 2,000 water treatment systems have been installed for producing the equivalent of distilled water by a process which is mechanically like filtration. The process is called demineralizing, deionizing, or desalting, depending on the point of view taken. To learn the magnitude of these operations, a canvass was made of six manufacturers who produce the bulk of industrial and utility water treatment equipment. The information reported by these manufacturers is given in Table 1 and covers plants with capacities from 10 gpm to more than 2,000 gpm, but does not include several thousand units fur-