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Q: Boiler gauge glass – Blow down is carried out if water level rises, but suddenly drops when steam is introduced, where is the water level and what’s the next action taken.

I would consider carrying out blow down both gauge glass + cross check visible water level with the reading from the remote water level transmitter which sends signal to the boiler panel, which has setting how much is low water level. The low low water level safety device is quite direct, inside that black cylinder is a float, if the float falls to the low low water level, triggers alarm and boiler burner shut down (if was running). The boiler water level transmitter also forwards the reading to a gauge in ECR to monitor boiler water level.

If both gauge glasses and remote water level transmitter indicates boiler water level is abnormally low, take actions to ensure boiler does not overheat. Introduce warm (70~80 degrees celcius) boiler water into the boiler, to reduce possibility of thermal shock if cold boiler water was pumped into an extremely hot boiler.

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