Do you know the working principle of American Standard ball valve?
Ball Valve is a valve that opens and closes by rotating the closing part around the center line of the valve body. Its closing part is a sphere.
Have you heard about the working principle of the American Standard ball valve? Here is how it works:
Opening process:
In the closed position, the ball is pressed tightly against the valve seat by the mechanical pressure of the valve stem. When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the angular plane at the bottom causes the ball to disengage from the valve seat. The valve stem continues to rise and interacts with the guide pin in the spiral groove of the valve stem, allowing the ball to begin to rotate frictionlessly until it is fully open. The valve stem rises to the limit position and the ball rotates to the fully open position.
Closing process:
When closing, turn the handwheel clockwise, the valve stem starts to drop, causing the ball to leave the valve seat and start to rotate. Continue to turn the handwheel so that the valve stem is affected by the guide pin embedded in the spiral groove on it, causing the valve stem and the ball to rotate 90° at the same time. When it is about to close, the ball has rotated 90° without contacting the valve seat. When the handwheel rotates the last few times, the angular plane at the bottom of the valve stem mechanically wedges and presses the ball, making it tightly pressed on the valve seat to achieve complete sealing.
