The fixed pneumatic ball valve is characterized by small opening and closing torque, rapid opening and closing, small flow resistance coefficient, fire prevention, anti-static, automatic valve body discharge, etc. It is especially suitable for high pressure, high temperature and large diameter pipelines, and is widely used in various fields of production and life such as natural gas, oil products, chemical industry, metallurgy, urban construction, environmental protection, etc.

Why is the pneumatic butterfly valve broken?
The stainless steel wire mesh sleeve in the pneumatic butterfly valve is mainly used to maintain the bellows and accept the medium pressure (mainly axial force) in the bellows compensator. The mesh sleeve is wrapped outside the corrugated pipe, and both ends are welded with the corrugated pipe, end ring and joint.
(1) The wire mesh sleeve is pulled off due to faulty welding
Due to the welding quality, the corrugated pipe, ring and wire mesh sleeve in the trinity welding process form a part of steel wire false welding (over burning or last welding). In this way, after the hose is installed in the pipeline, due to the uneven stress on the steel wire, under the effect of the medium pressure, the steel wire at the faulty weld will pull off first, so that the entire wire mesh sleeve will pull off, which will lead to the failure of the bellows drum and the risk of occurrence. In order to eradicate this situation, the welding quality should be improved. Before the hose leaves the factory, the water pressure and air tightness test should be stopped. Only after it is qualified can it leave the factory.
(2) Improper device, resulting in wire mesh breaking
During the installation of the hose, the hose will be stretched and twisted due to improper installation or high pressure. When the stress generated by stretching or twisting exceeds the ultimate strength of the hose wire mesh sleeve, the mesh sleeve at the welding part of the hose trinity or the mesh sleeve at other parts will be pulled off, thus making the difference between the corrugated pipe threading pneumatic butterfly valve and the corrugated pneumatic butterfly valve