1. Why vaccum is necessary 2.Boiler heating surface are? 3.Use of 3 element feed control station

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Answering questions related to vacuum, boiler heating surface, and 3 element feed control station.

Vacuum is necessary to remove air and other gases from a system to create a low-pressure environment.
Boiler heating surfaces are the areas of the boiler where heat is transferred from the combustion gases to the water or steam.
3 element feed control station is used to maintain the water level, steam flow, and feed water flow in a boiler.
Examples of vacuum applications include vacuum distillation, vacuum drying, and vacuum packaging.
Examples of boiler heating surfaces include the furnace walls, superheater tubes, and economizer.
Examples of 3 element feed control station include level transmitter, flow transmitter, and controller.

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