Internal Parts of boiler:

Pressure Gauge:   For indicating steam pressure

Water Level Indicator: for indicating water level.

Steam Stop Valve: Permits flow of steam from boiler as and when desired.

Feed Check Valve: Permits flow of water to boiler.

Blow off Cock: For removing settlements collected at the bottom of boiler.

Manhole: Permits entering of operator or inspection staff.

Fusible Plug: For avoiding any explosion because of overheating.

Boiler Accessories: Auxiliary equipment for the efficient boiler operation.

Preheater: A heat exchanger which is used to heat air entering the boiler with waste flue gases . Economiser: A heat exchanger to heat feed water by means of outgoing flue gasses. Superheater: To super heat the steam which is coming from boiler.

BABCOCK & WILCOX BOILER:  It is horizontal, natural draught, stationary, externally fired, water tube boiler. It is high capacity boiler and can produce steam at a pressure of 4 Mpa at the rate of 40000 kg/hr.