Steam Boilers, Engines, Nozzles and Turbines
The feed check valve is used in order to

Recirculate unwanted feed water
Allow high pressure feed water to flow to drum and not allow reverse flow to take place
Regulate flow of boiler water
Check level of water in boiler drum

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Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation of a boiler is a measure to compare

The two different boilers of the same make
Any type of boilers operating under any conditions
Two different makes of boilers operating under the same operating conditions
The given boiler with the model

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