In comparison, the structure of a ball valve is relatively simple. It is mainly composed of a spherical valve body and an orifice through the ball. The sphere is the core component of the ball valve, usually made of metal or other solid materials. The orifice on the sphere is equal to the diameter of the pipe. When the sphere is rotated to a specific angle, the orifice is aligned with the pipe and the fluid can pass through smoothly; when the sphere is rotated 90 degrees, the orifice is perpendicular to the pipe and the valve is closed, preventing the flow of the fluid. The body of the ball valve is generally divided into different structures such as one-piece, two-part and three-part to meet different installation and use requirements. The operation of the ball valve is also very simple, only through the valve stem to drive the ball to rotate 90 degrees to achieve the valve on and off. This simple structural design makes the ball valve has the advantages of small size, light weight, easy installation and maintenance.