What type of valve should be included in a bypass around a regulating valve?

Including a globe valve in a bypass around a regulating valve is a practical choice due to the specific design and function of globe valves. Globe valves are particularly well-suited for throttling service, which is the primary purpose of a regulating valve. They provide better control over the flow rate, allowing for precise adjustments of the fluid moving through the system.

The design of the globe valve features a disk that can move up and down or rotate to regulate flow effectively. This capability aligns well with the need to adjust and maintain specific pressure or flow scenarios in a bypass system. Additionally, globe valves are capable of handling high-pressure drops, making them ideal for applications where flow regulation is critical.

When considering the other types of valves, a gate valve, while effective for on-off control, does not offer the same level of throttling precision and is generally not recommended for applications where flow regulation is necessary. A ball valve also provides good shut-off capabilities, but it is less effective for fine adjustments to flow compared to a globe valve. A check valve is designed to prevent backflow and does not serve a throttling function, which is essential in a bypass designed for regulation purposes.