Handle Ball Valves Manufacturers

The working principle of the manual ball valve is to make the valve unblocked or blocked by rotating the valve core. The ball valve switch is light, small in size, can be made into a large diameter, reliable sealing, simple structure, convenient maintenance, the sealing surface and the spherical surface are often closed, and are not easily eroded by the medium, and are widely used in various industries.
It works like this:
open process
1 In the closed position, the ball is pressed 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 its bottom angular flat makes the ball disengage from the valve seat.
3 The stem continues to lift and interacts with the guide pin in the stem’s helical groove, causing the ball to begin to rotate without friction.
4 Until it reaches the fully open position, the valve stem is lifted to the limit position, and the ball rotates to the fully open position.
shutdown process
1 When closed, turn the handwheel clockwise, the valve stem starts to descend and the ball leaves the valve seat and starts to rotate.
2 Continue to rotate the handwheel, the valve stem is acted by the guide pin embedded in the upper spiral groove, so that the valve stem and the ball rotate 90° at the same time.
3 Just before closing, the ball has rotated 90° without making contact with the seat.
4 During the last few turns of the handwheel, the angular plane at the bottom of the valve stem mechanically wedges the ball to press it tightly against the valve seat to achieve a complete seal.