The Japanese standard ball valve is a switch part that controls the flow rate. Japanese standard ball valves are usually divided into flange type and threaded connection type, the difference between the two is that they are connected to the pipeline in different ways, but the overall design structure, layout and opening and closing parts of the valve are no different, all of which are 90° rotation movement of the ball around the central axis of the valve body to achieve the control of pipeline opening and closing medium.