Pneumatic flange ball valve is a ball valve equipped with a pneumatic actuator. The execution speed of pneumatic actuators is relatively fast and does not require manual labor, which greatly saves human resources and time. Pneumatic flange ball valve evolved from globe valve. It has the same 90 degree rotation lifting action, but the difference is that the plug body is a sphere with a circular through-hole or channel passing through its axis. The ratio between the sphere and the channel should be such that when the sphere rotates 90 degrees, it should all appear spherical at the inlet and outlet, thereby cutting off the flow.