how to select valve
Dec 31, 2019| 1, clear the purpose of the valve in the equipment or device, first to determine the working conditions of the valve: applicable medium, working pressure, working temperature and so on.
2. Determine the nominal size and connection mode of connecting pipe with valve: flange, thread, welding, card sleeve, quick mounting, etc.
3. Determine the way to operate the valve: manual, electric, electromagnetic, pneumatic or hydraulic, electric linkage or electro-hydraulic linkage, etc.
4, according to the pipeline medium, working pressure, working temperature to determine the selection of the valve shell and internal materials: gray cast iron, malleable cast iron, ductile iron, carbon steel, alloy steel, stainless acid steel, copper alloy, etc.
5. Type of valve: closed circuit valve, adjustment valve, safety valve, etc.
6. Determine the type of valve: gate valve, globe valve, ball valve, butterfly valve, throttle valve, safety valve, pressure reducing valve, steam trap, etc.
7, determine the parameters of the valve: for automatic valves, according to different needs, first determine the allowable flow resistance, discharge capacity, back pressure, etc., and then determine the nominal size of the pipe and the diameter of the seat hole.
8. Determine the geometric parameters of the selected valve: structural length, flange connection form and size, height direction of the valve after opening and closing, bolt hole size and number of connections, overall valve appearance size, etc.
In addition, xiangshan wenhan fluid equipment co., ltd. believes that the existing information can also be used, such as, valve product catalog, valve product samples and other appropriate selection of valve products.