For pneumatic ball valves, they are also widely used in engineering projects. When using pneumatic ball valves, the pressure strength, stability and fatigue performance of the products should be considered.
From years of application practice and failure analysis of pneumatic ball valves, it is found that the calculation and evaluation methods for stability given in the standard are not enough, and the fatigue life only gives a relatively rough limit range (the average fatigue life is 103~105). Sometimes a product that fully meets the requirements of the standard will also have some problems in actual use. For example, in the pre displacement state of the internal pressure axial pneumatic ball valve, the pipe is prone to plane instability during the pressure test; in the full displacement state of the large diameter external pressure axial pneumatic ball valve, the pipe is prone to circumferential instability; in the full displacement state of the small diameter compound pull rod type pneumatic ball valve and hinge type pneumatic ball valve, the column instability is prone to occur. Excessive deformation of the pipe not only affects its stability, but also provides favorable environmental conditions for stress corrosion.
The main problems of pneumatic ball valve are the stability and corrosion of the pipe. Through reasonable design of non pneumatic ball valve waveform parameters and fatigue life, correct installation, and improvement of piping stress analysis and other measures, the problem of pipe stability can be solved. The corrosion problem can be solved by two ways: (1) reasonable material selection and structural design of pneumatic ball valve to block the corrosion source.
(2) Strengthen the management of ponding in the chamber to fundamentally solve the corrosion problem.
There are many types of pneumatic ball valves, including ordinary ones and other ones, which are used in different pipelines. The compensation direction is divided into horizontal, axial and angular directions. You can communicate with us in many ways before purchasing, so that we can provide you with more convenience and accuracy. Dongfeng has decades of production experience, rich technical experience, and product quality assurance, The pneumatic ball valves produced by Dongfeng are used in projects all over the country. Our products are strictly tested before leaving the factory. Dongfeng warmly welcomes you to visit and guide the work of pneumatic ball valves. Your trust is our great power.