Working Principle Of Insulation Jacket Ball Valve

1. 3 Piece Threaded Ball Valve opening process

1 In the closed position, the ball is pressed tightly against the valve seat by the mechanical pressure of the valve stem.

2 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 detach from the valve seat.

3 The valve stem continues to be lifted and interacts with the guide pin in the spiral groove of the valve stem, causing the ball to begin to rotate without friction.

4 Until the fully open position, the valve stem is lifted to the limit position and the ball rotates to the fully open position.

2. Closing process

1 When closing, turn the handwheel clockwise, the valve stem begins to fall and the ball detaches from the valve seat and begins to rotate.

2 Continue to rotate the handwheel, and 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.

3 When it is about to close, the ball has rotated 90° without contact with the valve seat.

4 During the last few turns of the handwheel, the angular plane at the bottom of the stem mechanically wedges against the restraining ball, pressing it tightly against the valve seat to achieve a complete seal.