What type of valve is designed to rotate 90 degrees?

A ball valve is specifically designed to rotate 90 degrees to achieve a fully open or fully closed position. This design utilizes a spherical disc (the "ball") with a hole in the center, allowing for smooth flow when the hole is aligned with the pipeline. When the ball is rotated 90 degrees, the hole is perpendicular to the flow path, effectively sealing off the flow.

This operation is ideal for applications where quick shut-off is necessary, as the 90-degree rotation provides rapid transition between open and closed states. Ball valves are commonly used in various industries because they offer low resistance to flow and are durable, making them suitable for both liquid and gas applications. Their design also minimizes the risk of leaks, further enhancing their reliability in fluid control systems.