A ball valve is a widely used flow control device that regulates the passage of liquids, gases, or slurries by means of a spherical ball with a central bore (hole) inside its body. As a quarter-turn valve, it only requires a 90-degree rotation of the handle or actuator to switch between fully open and fully closed positions, making it simple and efficient to operate.
The core working principle of a ball valve is straightforward: when the handle is turned, the internal ball rotates to align its bore with the pipeline, allowing fluid to flow freely; when rotated 90 degrees, the solid part of the ball blocks the flow path completely, achieving an airtight seal. The handle’s position provides clear visual confirmation of the valve’s status—lying flat when open and perpendicular to the pipeline when closed.