The obvious difference in appearance between a three way ball valve and a two way valve is another flow path. The three-way ball valve is mainly used to change the flow direction of the medium. Except for inlet A, outlet B, and reversing port C, the three-way ball valve also has no ability to transfer flow. What is the principle and schematic diagram of a three-way ball valve switch?

Principle of three-way ball valve switch:

A. Open process

1. In the closed position, the mechanical pressure of the valve stem pushes the ball towards the valve seat.

2. Rotate the handwheel counterclockwise to move the valve stem in the opposite direction, while the lower angular plane releases the ball from the valve seat.

3. The valve stem continues to rise and interacts with the guide pin in the spiral groove of the valve stem, causing the ball to start rotating without friction.

4. The valve stem rises to the position and the ball rotates to the open position until it reaches the open position.

B. End Process

1. When closed, rotate the handwheel clockwise, and the valve stem will begin to lower and the ball will begin to rotate away from the valve seat.

2. Continue to rotate the handwheel. The valve stem is inserted into the spiral groove at the top under the action of the guide pin, so the valve stem and steel ball rotate simultaneously by 90 °.

3. When attempting to close, the ball rotates 90 ° without touching the valve seat.

4. In the few turns of the handwheel, the corner plane at the bottom of the valve stem will be mechanically wedged, pushing the ball to firmly push the valve seat and seal it.