The ball valve is mainly used for cutting, allocation, and changing the flow of the medium on the pipeline. The ball valve designed as the V-shaped opening also has a good flow adjustment function. The ball valve is suitable for frequent operation, and the opening and closing are quickly and light. It also has small fluid resistance, simple structure, relatively small volume, light weight, and easy maintenance. The sealing performance is not limited by the direction of installation, and the flow of the medium can be arbitrarily.