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what is the principle of the alarm hole on the boiler

boiler water level alarm principle

Low water alarm - For safe boiler operation the low water alarm ensures that the combustion of fuel does not continue if the water level in the boiler has dropped to or below a predetermined level. For automatically controlled steam boilers national standards usually call for two independent low level alarms to ensure safety.

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Boiler Alarms And Trips | 5 Common Boiler Safety Devices

Mar 01 2018 · 2) Low low water level: If alarm at level L2 is not acknowledged the level will drop further to level L1 and burner will stop firing to prevent boiler shell from damage due to excessive heat from the burner flame. 3) High water level: Alarm will sound when consumption of water does not match the intake of feed water via a feed water pump. Water has reached level H1.

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