3 Conclusion By improving the sealing structure of the thermal insulation pneumatic ball valve, the sealing performance is excellent, especially the improved flexible graphite replaces the O-ring, which is widely used at 425 ℃. With the development of domestic industrial level and technological progress, its performance will continue to improve and its application scope will continue to expand. The insulated pneumatic ball valve is improved, designed and manufactured according to the market demand. The valve has the characteristics of compact overall structure, convenient operation, reliable sealing and long service life. At present, the insulated pneumatic ball valve operates well under the user's working conditions, and all performance indicators meet the design requirements. It has excellent performance for liquid medium with easy solidification and high viscosity, especially suitable for thick medium such as rosin.

What to do after plastic coated pneumatic butterfly valve breaks
Plastic coated pneumatic butterfly valves play a vital role in our lives, especially in steel, petroleum, chemical and other industries, and also use a large number of dust, flammable and explosive gases in harsh environments. Therefore, in order to avoid problems in the operation of plastic coated pneumatic butterfly valves, some preventive measures should be considered in advance according to various factors, and now they are being improved from time to time. Now let's start with a plan to deal with a problem. What to do if the plastic coated pneumatic butterfly valve breaks?
1. Reorganization method
Saw off plastic coated pneumatic butterfly valve; Replace a hose with a length similar to the cracked hose under pressure, and saw off its pipe joint; Replace the cracked hose of the welded pneumatic butterfly valve connector with the hose; Clean the welding hose before use.
2. Osteotomy
Friction plastic coated pneumatic butterfly valve to clean cracks and cut cracks; Insert the self-made "bone" into the blocked hose. In case of emergency, the tube with the same outer diameter as the hose bone can also be used as "bone"; Clamp the hose and "bone" with self-made steel plate (8 can be used in emergency). Use iron wire instead of self used steel clamp); After cleaning, clean the plastic hose and use it.
3. Binding method
The crack of plastic coated pneumatic butterfly valve is one of the adhesives commonly used in construction machinery; 2-3 layers of oil resistant adhesive, 2-3 times the length of the crack, 2-3 layers of adhesive around (each layer needs to be glued); Fix the oil resistant adhesive wrapped at the crack with 12 wires; The adhesive is fixed.