Steps to select valve:
Clarify the purpose of the valve in the equipment or device, determine the valve's working conditions, applicable medium, working pressure, working temperature, etc.
Determine the nominal diameter and connection method of the pipeline connected to the valve: flange, thread, welding, etc.
Determine the way to manipulate the valve: manual, electric, electromagnetic, pneumatic or hydraulic, electrical linkage or electro-hydraulic linkage, etc.
According to the medium, working pressure and working temperature of the pipeline, the materials of the shell and internal parts of the selected valve are determined: gray cast iron, malleable cast iron, ductile iron, carbon steel, alloy steel, stainless acid-resistant steel, copper alloy, etc.
Choose the type of valve: closed circuit valve, regulating valve, safety valve, etc.
Determine the type of valve: gate valve, globe valve, ball valve, butterfly valve, throttle valve, safety valve, pressure reducing valve, steam trap, etc.
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 diameter of the pipeline and the diameter of the valve seat hole.
Use existing information: valve product catalog, valve product samples, etc., to select appropriate valve products.
Determine the geometric parameters of the selected valve: structural length, flange connection form and size, valve height dimension after opening and closing, connecting bolt hole size and number, overall valve overall size, etc.
Check whether the parameters of the selected valve meet the given working conditions.