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Function of feed pump in a boiler feed system / steam turbines
The feed pump raises the feedwater to a pressure high enough for it to
enter the boiler.
For auxiliary boilers, where small amounts of feedwater are pumped,
a steam-driven reciprocating positive displacement pump may be used.
Another type of feed
pump often used on package boiler installations is known as an 'electro
feeder'. This is a multi-stage centrifugal pump driven by a constant speed
electric motor. The number of stages is determined by the feed
quantity and discharge pressure.