What type of valves are often used for isolation in piping systems?

Gate valves are specifically designed for isolation in piping systems because of their ability to provide a complete shut-off or full flow. They feature a wedge-shaped disc that moves up and down to either open or close the flow path, ensuring minimal pressure drop when fully open and a tight seal when closed. This makes them highly effective for isolating sections of pipe for maintenance or repairs.

While check valves prevent backflow, ball valves offer quick operation with good sealing ability, and butterfly valves provide a more compact design for some applications, none of these valves are as commonly used for complete isolation as gate valves. The design and function of the gate valve enable it to perform its primary purpose of isolating sections of pipelines efficiently.