To adapt to what anti seismic requirements regulating pneumatic valve

fuyang nony, pneumatic valve co. , LTD is a professional production of various kinds of regulating pneumatic valve, the product mainly includes nitrogen seal pneumatic valve, self-reliance type regulating pneumatic valve, pneumatic diaphragm regulating pneumatic valves, electric control pneumatic valve, pneumatic valve, butterfly pneumatic ball valve five series, etc.
pneumatic valve is indispensable joint of pipeline system. In fact, in computing a the regulating pneumatic valve in the pipeline system usually gives the performance parameters of the junction line. Although not very accurate, but the general regulation of pneumatic valve is higher than pipeline strength and does not become a 'weak link' on my hands and knees in the system; 'according to logical reasoning, if pipeline system meets the requirements, adjust the pneumatic valve must also conform to the requirements. This is what is said in the ASME rules editor. According to the laws and regulations, if the pipeline and pneumatic valve is designed according to the laws and regulations, and manufacturers can show to adjust the weakest part of the pneumatic valve is better than line intensity is high, so the regulating pneumatic valve is considered to be qualified. This major should show the adjustment of the cutting area and the profile of the pneumatic valve film value must be at least % higher than pipeline of the call. If the line and adjustment of the pneumatic valve material is qualitative different, consider that can withstand the pressure by the differences between them. （ According to ASME Ⅲ, the NC/ND) 。
in the same line size of regulating pneumatic valve and pipeline, when there is no doubt that proved to be qualified; Typically adjust the intensity of pneumatic valve is higher than with the connection of pipeline % ~ %, but when using reducer or adjust the pneumatic valve smaller than pipe size times or more, is a problem. This problem can be slow down in a number of ways, is a simple way to adjust the pneumatic trims area down to the same as the line size the less have taken by its simple and easy way, because with a large size of the pneumatic valve adjustment means higher cost. Another method from the buyer that understand the line load and stress analysis. Naturally, the stress analysis will increase the cost of production, especially if the application of computer method one by one finite element. The first kind of solution is to use high pressure coefficient of pneumatic valve body ( That is to say, with levels ANSl instead of Q) , this will increase the metal cutting section, make metal material increases, but perhaps more than with large size of pneumatic valve adjustment cost is lower. This, of course, several ways of combining together can achieve the best effect.
in general, adjust the structure of the pneumatic valve pneumatic valve body don't need to have more to bend to meet the requirements of earthquake resistance and usually pneumatic valve body than the line intensity is high, and adopt the method of stress analysis is also very simple. Occasionally need to use some of the technical transformation, the use of select regulating pneumatic valve size and pressure coefficient at the same time to meet the requirements of liquid handling and anti seismic requirements. （ According to tests, pneumatic valve)