2、 Factors affecting the safety of valve body welds
1. Stress concentration at weld root Due to the assembly alignment and positioning requirements of all welded pneumatic ball valve body, there is a circular assembly gap at the weld root, which will lead to a large stress concentration at the valve body weld root. Through finite element analysis and calculation, under the working pressure of 10MPa, it can be clearly observed that a large stress concentration occurs at the root of the weld for the valve body of 20in, 600Lb pneumatic ball valve, and the Von misese stress at the root reaches 275MPa, which has exceeded the yield strength of A105 material and reached about 3 times the normal working stress.

Method of selecting stainless steel pneumatic butterfly valve connector
We should pay attention to the following points when selecting the quick stainless steel pneumatic butterfly valve connector:
1. Pressure of fluid: the pressure of fluid is also the hub for selecting quick coupling;
2. Structure of automatic valve opening and closing
As for the structure of valves, there are two-way switch type, one-way switch type and two-way open type, so please pay attention; 3. The type and temperature of fluid depend on the fluid, and the proper body material and sealing material are different. As there is fluid flowing out of the piping except for two way switch type during separation. For those made of steel, those made of water should be made of brass or stainless steel; 4. Please confirm the model and material of the quick coupling and specify the assembly shape and size corresponding to the piping characteristics for the appearance and size of the device; 5. Application environment of quick hose connector: separate the humidity premise, dust condition, random corrosion and other application environment of the application environment to consider and select the type, body material and sealing material of quick hose connector.