Globe valves are normally used to start, stop and regulate the flow of liquid or steam in a pipeline. But have you ever taken a moment to think about the larger meaning behind these small but mighty valves? It turns out that the key to understanding how smoothly your system works lies in an official rating called Cv (flow coefficient). This figure helps calculate the maximum flow capacity for the valve, giving you insight into the efficiency of liquid transport within your entire system. In this article we’ll explore what exactly Cv is and why it’s so important to understand before installing a globe valve.