Which type of valve is typically used for controlling flow in piping systems?

The choice of a gate valve as the answer reflects its primary design and function in piping systems. Gate valves are specifically designed to control the flow of fluid by either fully opening or fully closing. When the gate is lifted, fluid can flow freely with minimal resistance, effectively allowing for optimal flow control.

Unlike other types of valves, such as ball valves, which are often used for quick shut-off and can also control flow, gate valves are favored in applications where minimal pressure drop and full flow are necessary. They are ideal for on/off service rather than throttling, as their design is not suited for achieving a variable flow rate.

In contrast, check valves are used to prevent backflow, pressure relief valves protect equipment by releasing excess pressure, and ball valves can provide on/off control with good tightness but often do not handle flow modulation as effectively as gate valves in larger piping systems. Therefore, gate valves are typically regarded as the most suitable option for controlling flow in various piping applications.