What are the advantages and disadvantages of pneumatic ball valves?

The pipeline of  pneumatic  ball valves is primarily used for rapid shut-off, as well as the distribution and direction change of media. Pneumatic Ball Valves are a completely new type of valve. So what are their advantages and disadvantages? Let me explain them to you below
1. The fluid resistance is small, and its resistance coefficient is equal to that of a pipe section of the same length.
2. Simple structure, compact size, and lightweight.
3. Compact and reliable, ball valves widely utilize plastic for their sealing surfaces, offering excellent sealing performance and have been extensively employed in vacuum systems.
4. Easy to operate, with rapid opening and closing. Simply rotate 90 degrees from fully open to fully closed, facilitating long-distance control.
5. Easy maintenance: The Pneumatic Ball Valve has a simple structure, with movable sealing rings that can be easily disassembled and replaced.
6. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, ensuring no erosion of the valve sealing surfaces during medium passage.
7. Wide applicability, with diameters ranging from a few millimeters to several meters, suitable for applications from high vacuum to high pressure.
8. Since pneumatic ball valves use gas as the power source, typically at a pressure of 0.2-0.8 MPa, they are relatively safe. In case of gas leakage, compared to hydraulic or Electric Actuators, the gas can be directly discharged without causing environmental pollution, while also maintaining high safety.
9. Compared to manual and turbine-operated ball valves, pneumatic ball valves can be configured for large diameters (manual and turbine-operated ball valves are generally limited to DN300 or below, while pneumatic ball valves can reach DN1200)
The disadvantages are as follows:
1. Its regulating performance is relatively poor compared to globe valves, especially pneumatic valves;
2. Because the main valve seat sealing ring material of  pneumatic  ball valves is polytetrafluoroethylene, it is inert to almost all chemicals. However, the physical properties of polytetrafluoroethylene, including its high coefficient of expansion, sensitivity to cold flow, and poor thermal conductivity, require that the design of valve seat seals must revolve around these characteristics.
When the sealing material becomes hard, the reliability of the seal is compromised. Moreover, polytetrafluoroethylene has a lower temperature resistance rating and can only be used below 180 ℃. Beyond this temperature, the sealing material will age. If you want to use it for a long time, it is generally recommended to use it at 120 ℃.