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

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

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Steam Boilers, Engines, Nozzles and Turbines
Boiler H.P. is defined as the

Work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
Steam evaporation rate per kg of fuel fired
Work done by 1 kg of steam at saturation condition
The evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam

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