Question

Which pump can be used to handle boiler feed water of 150 degree temperature?

Answer 1

Using hot condensate to heat the boiler feedwater leaves the boiler with less work to do in converting the water to steam. In other words, less fuel is needed to produce steam from hot water rather than cold water. 

Answer 2

The difference between 140°F and 180°F in boiler feed water temperature equates to about a 3-4% difference in boiler efficiency. Feed water preheating typically occurs in either the feedwater tank or deaerator using supplementary steam.