1. Small fluid resistance, pneumatic ball valve is the one with the smallest fluid resistance among all valves. Even the reduced diameter pneumatic ball valve has relatively small fluid resistance. 　　　　

The selection must pay attention to the quality problems. Of course, we should also pay attention to the quality problems. If the quality problems cannot be guaranteed and the pneumatic control valve cannot meet the standard of normal operation of the enterprise, the pneumatic control valve may not work normally, or even there is no way to control it. So when selecting the pneumatic control valve, we should pay attention to the service life of the pneumatic control valve, whether there is any possibility of failure, and the probability of failure. Then we should check the maintenance cost, otherwise it is difficult to ensure the quality of the pneumatic control valve.