DIFF Subgroup
F22D 5/26 Automatic feed-control systems
Introduced: September 1968
Full Title
Controlling water feed or water level; Automatic water feeding or water-level regulators > Automatic feed-control systems
IPC and CPC are identically structured here. All 5 subcodes exist in both systems.
Child Classifications
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- F22D 5/28 responsive to amount of steam withdrawn; responsive to steam pressure IPC+CPC Available in IPC and CPC
- F22D 5/30 responsive to both water level and amount of steam withdrawn or steam pressure IPC+CPC Available in IPC and CPC
- F22D 5/32 influencing the speed or delivery pressure of the feed pumps IPC+CPC Available in IPC and CPC
- F22D 5/36 for feeding a number of steam boilers designed for different ranges of temperature and pressure IPC+CPC Available in IPC and CPC