Quality inspection process of sanitary stainless steel quick-install butterfly valve
The quality inspection process of sanitary stainless steel welded butterfly valves. With the development of my country’s infrastructure, large-scale national projects have been put into construction and implementation, resulting in an increasing number of sanitary valves in power, petroleum, chemical, urban water supply, and drainage systems, especially sanitation. The amount of butterfly valve is very large. my country's production of sanitary valve and pipe fittings can be divided into two categories from the installation structure, one is the quick-installation type, and the other is the welding type. The production caliber of sanitary quick-installed pipe fittings is generally below DN700, and the multi-layer structure is mostly used for large calibers. The amount of sanitary pipe fittings below DN500 is the largest, so users will encounter many problems when using them. Here, we will summarize and summarize the common problems, and guide the correct installation and use of users to sample or purchase sanitary fast-installed butterfly valves. All inspections are very necessary. Random inspections on product quality are: one is to check the quality of the product, and the other is to reduce unnecessary maintenance and renewal of sanitary valves after installation, and the success rate of one-time installation is high. However, users did not pay attention to the test of sanitary valves during the random inspection, which caused doubts about your quality, or rejected them as unqualified. Where is the reason? There are 4, 6, 8 and 12 screws on the pressure ring according to the diameter, and the maximum bolt diameter does not exceed M10. These screws are mainly used to fix the elastic valve seat and cannot bear all the medium pressure. The stainless steel butterfly valve can withstand all the medium force after the pipe is installed on the outer flange bolts. Due to structural reasons, it is common for users to notify the manufacturer of non-conformity due to the difference in the inspection operation. The product can pass the customs smoothly after communication, and there is no problem in use. Therefore, here are the matters that should be paid attention to, and communicate for users to better understand and use sanitary valve and pipe fittings.