What type of valve would you use for flow isolation in a piping system?

In a piping system, a gate valve is commonly used for flow isolation purposes due to its design, which allows for minimal pressure drop and full flow when the valve is open. Gate valves operate by lifting a gate out of the path of the fluid, enabling a straight flow path that does not obstruct the flow. This feature makes them particularly advantageous in situations where the goal is to prevent flow, as they can create a tight seal when closed, effectively isolating segments of the piping system.

While other types of valves exist, such as globe valves and ball valves, they serve different purposes. Globe valves are primarily designed for throttling control rather than complete flow isolation, making them less effective for applications where a full shutoff is needed. Ball valves can also provide good isolation and are known for their quick operation, but gate valves remain the standard choice in many applications due to their straightforward mechanism and ability to handle a wide range of fluids with low resistance.