What type of valve is commonly used to control the flow rate in a pipe?

A globe valve is specifically designed for regulating flow, making it the most suitable choice for controlling the flow rate in a piping system. The internal structure of a globe valve includes a movable disk and a stationary ring seat, allowing for fine adjustments in the flow. When the valve is opened or closed, the flow path is altered in such a way that it creates a throttling effect, giving operators control over the flow rate through the valve.

This control capability is particularly important in applications where adjustments need to be made frequently or precisely. Globe valves can maintain a stable flow rate despite changes in pressure, making them ideal for systems requiring a consistent supply of liquid or gas at a specific flow rate.

Other valves like ball valves, check valves, and gate valves serve different purposes. Ball valves typically provide a quick on/off operation and are not designed for flow regulation. Check valves prevent backflow in a system and do not offer adjustable flow rates. Gate valves, while suitable for isolating flow completely, are not efficient for fine control because they operate fully open or fully closed, lacking the ability to regulate flow velocity effectively.