2025-06-05Ball valve working principle
Opening procedure
1. In the closed position, the ball is pressed against the seat by the mechanical pressure of the valve stem.
2. When the handwheel is turned counterclockwise, the valve stem moves in reverse, and its bottom angular plane makes the ball free from the seat.
3. The valve stem continues to lift and interact with the guide pin in the spiral groove of the valve stem so that the ball begins to rotate without friction.
4. Until it reaches the full open position, the valve stem is raised to the limit position, and the ball is rotated to the full open position.