The pneumatic butterfly valve industry has developed very rapidly, and has occupied a place in the entire shock absorber industry, and plays an irreplaceable role. In recent years, more and more enterprises have joined in the production of shock absorbers, making the industry more prosperous. With the increasing competition and the improvement of technology, users can now buy shock absorber products at a lower price, and there are many models to choose from. But behind the prosperity, there are also many problems. Some manufacturers, in order to reduce costs, cut corners and take advantage of offline products, produce inferior products, which directly harms the interests of users. Some shock absorber factories do not calculate the load of shock absorber, even do not have a professional testing equipment. As a senior and responsible shock absorber enterprise, Shanghai Dongfeng specially shares with you how to judge whether a shock absorber meets the standard. The shell is the support of the shock absorber element. The perennial load, safety and high strength requirements are essential.
In order to raise the price of the shock absorber, the shock absorber is equipped with a shell that exceeds the normal requirements. For example, a large frame with a small ball valve is very funny. The customer may pay several times the normal price for this, which greatly increases the project cost. First, in order to reduce costs, the shell is very thin. For example, it obviously cannot pass the tensile test without deformation. It can be directly judged as unqualified products. Whether the two ends of the ball valve are tightly polished will affect the stability of the shock absorber. The national standard requires that the compression amount of the shock absorber is, which can ensure that the natural vibration frequency of the shock absorber is low enough to ensure the damping effect. In order to save costs and meet the load requirements, some manufacturers will make the ball valve very stiff, and the compression of the ball valve on the nominal load is very small. According to this standard, most shock absorbers on the market are unqualified. Customers must pay attention to the compression amount of ball valves when purchasing. (1) See the treatment of the shock absorber surface and the ball valve surface.
Generally, the normal life of pneumatic butterfly valve is 60000~80000 highway, and it can be used for 3~4 years if calculated by 20000 kilometers a year. It is also possible for the car owner to use the car for another year or two after proper maintenance. However, from the perspective of practical use of car owners, most car owners have less than 3 years. According to the calculation of a pneumatic butterfly valve manufacturer, more than 100000 pieces of three guarantee parts are returned from the mall every year, accounting for 8.3 ‰ of the annual output. The main reason is that consumers cannot maintain and use them correctly. In the true sense, there are not many problems with the quality of pneumatic butterfly valves. In other words, as long as the maintenance and application are in place, the pneumatic butterfly valve can be used for three to five years.