What is the primary role of the feedwater pump in a boiler system?

• A. To deliver feedwater to the boiler at the required pressure
• B. To heat the feedwater
• C. To vent non-condensables
• D. To measure level

Answer: (A)

The feedwater pump is responsible for delivering water to the boiler at the required pressure. In a steam boiler, water must be supplied under enough pressure to overcome the boiler’s internal pressure and to flow through the tubes, maintaining the proper water level and enabling continuous steam generation. The pump draws water from the condensate/deaerator system and raises it to the boiler pressure, supplying it through the feedwater line and control valve so that the boiler can maintain its intended level and pressure. If the water isn’t delivered at the right pressure, flow drops, water level can fall, and the boiler can overheat or be damaged. Heating the feedwater to improve efficiency is done by separate heat exchangers like feedwater heaters or economizers, while venting non-condensables and measuring the water level are handled by other components in the system.