The operation of a feed water regulator is primarily influenced by:

The operation of a feed water regulator is primarily influenced by water level because the feed water system is designed to maintain the appropriate water level within the boiler. Maintaining the correct water level is crucial for safe and efficient boiler operation since too low a water level can lead to overheating and potential damage to the boiler, while too high a level may cause flooding and water carryover into the steam lines.

The feed water regulator responds to changes in the water level in the boiler. When the water level drops below a preset point, the regulator opens to allow more feed water into the boiler to return the level to an optimal range. Conversely, if the water level rises too high, the regulator can close or adjust to prevent excess water from entering the system. This feedback loop ensures that the boiler operates safely and efficiently.

In contrast, while steam flow rate and water temperature can play indirect roles in the demand for feed water, they are not the primary influences on the regulator's direct operation concerning water management. Fuel type also does not directly dictate the functioning of the feed water regulator, even though it affects overall boiler performance. The governing principle of feed water regulation centers around maintaining the water level, which directly impacts boiler operation.