Working principle of pneumatic butterfly valve The butterfly plate is driven by the valve stem. If it turns 90 °, it can be opened and closed once. The flow of medium can be controlled by changing the deflection angle of the butterfly plate. The commonly used butterfly valves are wafer type butterfly valve and flange type butterfly valve. Wafer type butterfly valve uses stud bolts to connect the valve between two pipe flanges. Flange type butterfly valve has flanges on the valve, and bolts are used to connect the flanges on both ends of the valve to the pipe flanges.

The gas pneumatic butterfly valve is safer than the rubber hose, but you should still pay attention to identify when you choose to purchase it. Once you buy a low-quality pneumatic butterfly valve, it is not only unsafe, but also may cause risks.
Recently, Mr. Liu, who lives in Zhuodaoquan South Road, Hongshan District, reported that the security inspectors of the Natural Gas Company found that the plastic hose used in his home was leaking, so he bought a pneumatic butterfly valve by himself. Unexpectedly, the air leakage at home has become more serious. After inspection, it was found that the pneumatic butterfly valve purchased by Mr. Liu himself had quality problems, which led to gas leakage.
Here, the small editor reminds you that the pipe body of the gas pneumatic butterfly valve on the right track is made of stainless steel, which can prevent rats from biting, has strong corrosion resistance, small pressure loss, and has good flexibility. At the same time, the gas pneumatic butterfly valve is connected with gas appliances and gas meters in a safe thread way, which is not easy to fall apart. Therefore, gas pneumatic butterfly valves must be equipped with special valves. If inferior pneumatic butterfly valves are purchased or their own devices are not in place, gas leakage will easily occur
If citizens need to purchase gas pneumatic butterfly valves, they should go to the manufacturers of the track to choose. When installing the gas pneumatic butterfly valve, the small editor prompts you to pay attention to the following points:
1. After unpacking, the hose shall be used immediately to prevent damage to the pipe body caused by excessive cumulative bending times after repeated bending of the hose.
2. Check whether rubber sealing ring is installed on the two end joint flange;
3. The pipe body shall not be hung with objects.
4. After you move and disassemble the gas appliance, check whether the tube body and sealing ring are damaged or lost; 5. Do not use sharp metal to impact the pipe body;
6. Turn off the air source before the device;
7. After installation, apply a small amount of soap on the joint to check whether there is leakage caused by improper installation; 8. The hose shall not be placed at high temperature and shall not contact with the flame to avoid deformation of the sealing ring; 9. Check the hose first to see if there is any unexpected appearance damage during transportation; 10. The air source valve must be closed after operation.