The two-piece manual ball valve is mainly composed of valve body, ball, valve stem, sealing ring and other components. The valve body is divided into two parts, which are fastened together by bolts and other connectors to form a complete valve channel. The ball is located inside the valve body, and the opening and closing of the ball are controlled by the rotation of the valve stem, so as to achieve the flow and truncation of the medium.

The working principle of the two-piece manual ball valve is to open or block the valve by rotating the valve stem. Specifically, when the stem rotates, the sphere rotates with it. In the closed position, the ball is pressed against the seat by mechanical pressure from the stem, creating a seal. When it is necessary to open the valve, rotate the stem to remove the ball from the seat and the medium can flow through the valve. On the contrary, when the valve needs to be closed, the rotating valve stem causes the ball to press tightly on the seat again, cutting off the flow of the medium.