1. According to the control function selection, all kinds of valves have their own functions, selection should pay attention to its corresponding functions.
2. According to the working conditions, the technical parameters of commonly used valves include the working pressure, the maximum allowable working pressure, the operating temperature (minimum and maximum temperature) and the medium (corrosive, flammability), the selection should pay attention to the working conditions of the above parameters and the technical parameters of the valve in line with.
3. Choose according to the installation structure. Piping system installation structure has pipe thread, flange, card sleeve, welding, hose and so on. Therefore, the installation structure of the valve must be consistent with the installation structure of the pipe, and the size of the specification should be consistent.
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