1. The fluid resistance is small, and its resistance coefficient is equal to that of pipe sections of the same length.

2. Simple structure, small volume and light weight.

3. It is tight and reliable. At present, the sealing surface material of the ball valve is widely made of plastic with good sealing performance, and it has also been widely used in the vacuum system.

4. It is easy to operate and can be opened and closed quickly. Only 90 ° rotation is required from full opening to full closing, which is convenient for remote control.

5. It is easy to maintain, the ball valve is simple in structure, the sealing ring is generally movable, and it is convenient to disassemble and replace.

6. When the valve is fully opened or closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes through, it will not cause erosion of the valve sealing surface.

7. It has a wide range of applications, ranging from a few millimeters to several meters in diameter, from high vacuum to high pressure.