CPC Main Group
F23N 3/00 Regulating air supply or draught (conjointly with fuel supply F23N1/00)
7 direct subcodes
Child Classifications
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- F23N 3/02 Regulating draught by direct pressure operation of single valves or dampers
- F23N 3/04 by operation of single valves or dampers by temperature sensitive elements
- F23N 3/06 by conjoint operation of two or more valves or dampers (by power-assisted systems F23N3/08)
- F23N 3/08 by power-assisted systems