What do the three numbers on a reciprocating feedwater pump nameplate indicate?

The three numbers on a reciprocating feedwater pump nameplate typically indicate the dimensions of the steam and water pistons. This information is crucial for understanding the operating characteristics of the pump, as the size of the pistons directly affects the pump's capacity and efficiency. The specifications help engineers and operators determine how much water can be moved by the pump, which is vital for maintaining the boiler's water level and ensuring system performance.

In the context of pump operation, knowing the dimensions of the pistons can also inform maintenance needs and compatibility with existing systems, aiding in both troubleshooting and planning for replacements or upgrades. Understanding these dimensions ensures that the pump can handle the required flow rates and pressures without encountering inefficiencies or operational issues.