Analyze the reasons for random inspection of Sanitary Ball Valve's quality

With the development of my country's infrastructure construction, large-scale national projects have been put into construction and implementation, making the number of sanitary valves in power, petroleum, chemical, urban water supply and drainage systems increase, especially the use of butterfly valves. my country produces metal hard-sealed sanitary ball valves, which can be divided into two categories from the sealing structure: one is elastic hard-sealed structure, and the other is multi-layered hard-sealed butterfly valves. The production diameter of elastic hard-sealed butterfly valves is generally below DN500, and large diameters mostly use multi-layered structures. The sanitary ball valves below DN500 are used the most, so users encounter more problems when using them. Here, we summarize the common problems and guide the correct installation and use

It is very necessary for users to sample or fully inspect the purchased sanitary ball valves. The purpose of random inspection of product quality is:

First, to control the quality of the product,

Second, to reduce unnecessary maintenance and updates of sanitary ball valves after installation, and the success rate of one-time installation is high. However, when users test the hard-sealed butterfly valve during random inspection, they do not pay attention to some things, which causes doubts about the quality of the valve or rejection of the valve as unqualified.

What is the reason? The screws on the pressure ring are 4, 6, 8 and 12 according to the caliber size, and the maximum bolt diameter does not exceed M10. These screws are mainly used to fix the elastic valve seat and cannot withstand all the medium pressure. The sanitary ball valve can withstand all the medium force only after it is installed in the pipeline and tightened by the outer flange bolts. Due to structural reasons, the inspection operation is different and leakage occurs during acceptance. It is common for users to notify the manufacturer on the grounds of unqualified. After communication, the products can pass smoothly and there are no problems in use. Therefore, here are the matters that should be paid attention to, so that users can better understand and use the elastic hard-sealed sanitary ball valve.