The difference between ball valve and butterfly valve is that the opening and closing part of butterfly valve is a plate, while the opening and closing part of ball valve is a ball.

1. Ball valve is a valve whose opening and closing parts are driven by the valve stem and rotate around the axis of the ball valve. It can also be used for fluid regulation and control. According to the driving mode, the ball valve is divided into pneumatic ball valve, electric ball valve and manual ball valve. The ball valve is mainly used to cut off, distribute and change the flow direction of medium in the pipeline, It only needs to rotate 90 degrees and a small rotating torque to close tightly.

2. The ball valve has the action of rotating 90 degrees, the cock body is a sphere, and a circular through hole or channel passes through its axis. The ball valve is mainly used to cut off, distribute and change the flow direction of medium in the pipeline. It can be closed tightly only by rotating 90 degrees and a small rotating torque. The ball valve is more suitable to be used as a switch and shut-off valve.

3. Block valve, also known as closed-circuit valve, is used to connect or cut off the medium in the pipeline. Ball valve and gate valve belong to the same type of valve. The difference is that its closing part is a sphere, which rotates around the center line of the valve body to open and close. Block valves include gate valves, globe valves, ball valves and butterfly valves.