What is the function of the Main Feed Booster Pump?

• A. Increase the pressure of feedwater before it enters the boiler
• B. Cool the feedwater
• C. Remove dissolved gases from feedwater
• D. Supply boiler with steam

Answer: (A)

The main idea is to push feedwater into a high-pressure boiler. The Main Feed Booster Pump adds the extra pressure (head) needed so water can be forced from the condensate/feedwater system into the boiler against the boiler’s internal pressure. This ensures a steady, adequate feed and helps maintain proper water levels and steam generation, especially when the boiler is under high pressure or when long feedwater runs would otherwise reduce flow. It doesn’t cool the water, remove dissolved gases, or directly produce steam—the boiler does the steam, and the booster simply increases the water’s pressure to enter the boiler.