In a boiler system, why is a meter valve used?

A meter valve is specifically designed to measure the flow rates of fluids within a system, which is critical in ensuring that the boiler operates efficiently and safely. By accurately measuring flow, technicians can assess the performance of the boiler and make necessary adjustments to optimize function. This capability is essential in maintaining the desired operational parameters and ensures that the system runs within its designed specifications.

While the other functions mentioned, such as quick shutoff, preventing backflow, or adjusting temperature, are important in various piping applications, they do not pertain to the primary function of a meter valve. Each of those tasks is typically handled by other specific types of valves designed for those purposes, thereby reinforcing the role of the meter valve in flow measurement.