What type of valves are commonly used to isolate sections of pressure piping?

Gate valves are commonly used to isolate sections of pressure piping primarily because they are designed to provide minimal resistance to fluid flow when fully open, allowing for efficient and unrestricted flow. When closed, they create a tight seal that effectively stops the flow of fluid, making them ideal for applications where complete isolation of a section is required.

Additionally, gate valves typically have a simple design that makes them easy to operate, and they are generally reliable. Their ability to handle high pressures and temperatures further reinforces their suitability for isolating sections of pressure piping.

While other types of valves have their specific applications, they may not be as effective for isolation. For example, ball valves are often used for their quick on/off capability, but they can sometimes be less optimal in certain isolation situations compared to gate valves, which excel in fully opened or closed scenarios. Check valves are used to prevent backflow and are not intended for isolation purposes. Butterfly valves, while versatile and often used for throttling control due to their quick operation, might not provide the same level of tight shut-off as gate valves.