Flange ball valve is a commonly used valve type with the following features and advantages:

1. Compact structure: The flange ball valve itself has a relatively compact structure, which gives it advantages in installation and space occupation.

2. Easy to operate and maintain: The flange ball valve is simple to operate and can open and close quickly. It only needs to be rotated 90° to fully open or fully close, making it very convenient for maintenance and operation.

3. Wide range of applications: Flange ball valves can be used to control various types of fluids, such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, etc.

4. Good sealing performance: Plastic is widely used as the sealing surface material of flange ball valves, which has good sealing performance and has also been widely used in vacuum systems. In addition, the sealing surfaces of the ball and valve seat are isolated from the medium, and the passage of the medium will not cause erosion of the valve sealing surface.

5. Small fluid resistance: Due to the special design of the flange ball valve, its fluid resistance is very small, and the resistance coefficient is equal to that of a pipe section of the same length, so that the fluid encounters less resistance when passing through the valve.

6. Tight and reliable: The ball and valve seat of the flange ball valve are tightly combined, not easy to leak, and have strong pressure resistance.

7. Easy maintenance: Due to the simple structure of the flange ball valve, the sealing ring is generally movable, making it easy to disassemble and replace.

8. Wide range of applications: Due to the above characteristics of flange ball valve, it is widely used in various industries, such as chemical industry, petroleum, electric power, food, medicine, etc.

In general, the flange ball valve is an efficient, reliable, and versatile valve type that is widely used in various fluid control situations.