According to the selection of control functions, various types of valves have their own functions, and should pay attention to their corresponding functions when selecting them; according to the selection of working conditions, the technical parameters of commonly used valves include working pressure, maximum allowable working pressure, working temperature (minimum and maximum temperature) and medium (corrosive, flammable), when selecting, it should be noted that the above parameters of the working conditions are consistent with the technical parameters of the valve; select according to the installation structure. The installation structure of the pipeline system includes pipe threads, flanges, ferrules, welding, hoses, etc. Therefore, the installation structure of the valve must be consistent with the installation structure of the pipeline, and the specifications and dimensions must be consistent.
