What type of valve would be most suitable for throttling flow?

The globe valve is the most suitable type for throttling flow due to its design, which allows for precise control over the flow rate. The internal structure of a globe valve includes a movable disk or plug that fits into a seat, creating a variable opening. This ability to adjust the position of the disk relative to the seat enables the operator to finely control the flow through the valve, making it ideal for applications where exact flow regulation is crucial.

In contrast, a gate valve is designed primarily for fully open or fully closed positions and is not effective for throttling flow, as it does not provide the necessary control over the flow path. A ball valve, while good for quick shut-off applications, also lacks the fine control needed for throttling due to its quarter-turn operation. The swing check valve is intended to prevent backflow and allows fluid to flow in only one direction; it is not designed for flow regulation at all. Therefore, when it comes to throttling and controlling flow rates effectively, the globe valve stands out as the preferred choice.