CPC Subgroup
F22B 37/42 Applications, arrangements or dispositions of alarm or automatic safety devices (for feed-water heaters F22D1/14 )
Full Title
Component parts or details of steam boilers > applicable to more than one kind or type of steam boiler > Applications, arrangements or dispositions of alarm or automatic safety devices (for feed-water heaters F22D1/14 )
8 direct subcodes
Child Classifications
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- F22B 37/44 of safety valves
- F22B 37/46 responsive to low or high water level, e.g. for checking, suppressing or extinguishing combustion in boilers
- F22B 37/47 responsive to abnormal temperature, e.g. actuated by fusible plugs