The three-piece clamped ball valve consists of a three-part valve housing, and the middle body and valve ball are clamped from both ends by four longer bolts. A ball with a middle through hole is installed inside the valve body, and a hole with a diameter equal to the diameter of the pipe is opened on the ball, and the ball can be rotated in the sealing seat. There is a ring elastomer on each side of the pipeline direction to achieve sealing.

The working principle of the three-piece clamp ball valve is to rotate the stem to make the valve open or blocked. By rotating the ball 90°, you can change the direction of the through hole, so as to realize the switch of the ball valve. The valve has the characteristics of light switching, small volume, reliable sealing, etc. Its structure, sealing surface and spherical surface are often in a closed state, which is not easy to be eroded by the medium.