The closing part of the ball valve is a ball, the ball rotates around the center line of the valve body to open and close a valve, it has the following characteristics:

1) low flow resistance;

2) simple structure;

3) small size and light weight;

4) at present, the sealing surface material of ball valve is plastic, with good sealing property;

5) easy operation, quick opening and closing, convenient for remote control;

6) easy maintenance, seal ring is generally mobile, easy to remove and replace;

7) when fully open or fully closed, the sealing surface of the ball and the seat shall be isolated from the medium, which will not cause erosion of the sealing surface of the valve.