Pneumatic three-way ball valves are used for diverting, merging, and splitting media flow within pipelines. They primarily consist of a T-type or L-type three-way ball valve connected to a pneumatic actuator. Based on connection methods, they can be categorized as flanged or threaded. The pneumatic L-type three-way ball valve switches or interrupts the flow direction of media between two mutually perpendicular channels, serving a distribution function. In contrast, the T-type ball valve not only switches the flow direction but also connects all three channels or closes any single channel, enabling both diversion and convergence functions. Depending on operational requirements, a valve positioner and other relevant accessories can be installed on the actuator of the pneumatic three-way ball valve. This enables precise control over the movement of the ball valve's ball core, achieving automated control of the medium within the pipeline.