CPC Main Group F28B 9/00 Auxiliary systems, arrangements, or devices 5 direct subcodes Child Classifications Navigate with arrow keys, Enter to open F28B 9/005 F28B 9/02 for feeding steam or vapour to condensers F28B 9/04 for feeding, collecting, and storing cooling water or other cooling liquid F28B 9/08 for collecting and removing condensate F28B 9/10 for extracting, cooling, and removing non-condensable gases