What does the transfer pump move from the surge tank?

The transfer pump is designed to move specific fluids within a steam system, and in this case, it is responsible for transferring condensate and raw makeup water from the surge tank. Condensate is the liquid water resulting from the cooling of steam, which needs to be returned to the boiler to maintain efficiency and water levels. Raw makeup water is the additional water that is introduced into the system to replace losses due to evaporation and other processes.

This operation is crucial for the overall efficiency and functionality of a steam system, as proper water management directly impacts boiler performance, steam generation, and the prevention of issues such as overheating or pressure drops. The surge tank serves as a reservoir to accommodate fluctuations in water levels, ensuring that there is always a sufficient supply of water available for these processes.

Other options, while they may involve liquid transfer in different contexts, do not accurately describe the specific functions related to the transfer pump in relation to a surge tank. Therefore, the accurate understanding of the role of the transfer pump in moving condensate and raw makeup water is essential for effective steam system operation.