What type of valve is used to throttle the flow of the steam line?

The globe valve is specifically designed to control the flow of fluids, making it ideal for throttling applications. Its internal structure features a movable disk over a valve seat, which allows for precise regulation of the flow rate. When the valve is partially closed, it creates resistance to flow, enabling operators to finely adjust the steam flow in a steam line based on the system's needs.

In contrast, a ball valve typically offers quick on/off control rather than precise throttling, which is not optimal for applications requiring controlled flow. A check valve is intended to prevent backflow, ensuring that fluids flow in a single direction, and does not serve the purpose of regulating flow rates. Lastly, a gate valve is primarily designed for full flow applications and is best used in fully open or fully closed positions, as it provides minimal control when partially opened, making it less suitable for throttling. This clear distinction in functionality highlights why the globe valve is the preferred choice for throttling the flow of steam.