3. According to the caliber of pneumatic butterfly valve. The caliber of different pneumatic butterfly valves is different. What kind of caliber is needed in our construction work, and what kind of working effect should be paid attention to when doing this part of work. These are the basic references for selecting pneumatic butterfly valves from the aspect of caliber. The most important thing is to select pneumatic butterfly valves suitable for our work.

There should also be appropriate troubleshooting methods for the faults of electric valves. The faults caused by electric ball valves are included in this category. The valve body has a valve in the traditional sense that passes through the structure and intersects with a chamber. It opens and closes in the middle chamber of the position, and is responsible for carrying the actuating structure in the middle of these position valves. Because it is also in the case of this type of valve, the actuator consists of an engine hood fitted to the valve body and a valve stem connected to other valves.