Which type of valve is used primarily for throttling flow?

The globe valve is primarily used for throttling flow due to its design, which allows for fine control over the flow rate. Unlike other types of valves, the globe valve has a spherical body with an internal baffle that changes the flow direction, creating turbulence that provides more accurate control. This characteristic makes it suitable for applications where flow adjustment is necessary, enabling operators to regulate the flow of liquids or gases effectively.

The other valves mentioned have different primary functions; for instance, the gate valve is designed for fully open or fully closed positions, making it less effective for throttling. It creates minimal resistance to flow when open but does not allow for precise flow regulation. The plug valve can also be used for on-off flow control and does not provide the same level of control as a globe valve. Similarly, while a ball valve can be used for throttling in some cases, it is primarily designed for quick shut-off, offering lower precision in flow regulation compared to a globe valve. Therefore, the globe valve stands out as the correct choice for applications requiring effective throttling control.