Vacuum valve is used to open and close the pipeline, control the flow direction, adjust and control the parameters of the medium (temperature, pressure and flow). According to its function, it can be divided into shut-off valve, check valve, regulating valve, etc.
Stainless steel valve has entered the industrial application because of its long service life, not easy to rust, green environmental protection and other outstanding advantages, and has become the valve products that must be purchased in the pipeline field of various industries. However, the domestic valve manufacturers that can meet the international standards are not popular. Therefore, customers must require the manufacturers to provide the production and factory certificate of various stainless steel valves before purchasing the stainless steel valves, Spectrometer can also be used for detection. Spectrometer is widely used because of its high precision and wide application range. Its application in the field of precious metal and stainless steel valve detection has also been rapid development in recent years. Some 304, 316L valves mainly rely on this equipment for testing, which can reduce the purchase of unqualified products.
Stainless steel vacuum valve is usually used in the situation with certain corrosive medium, such as corrosive medium, food, medicine, oil, liquid metal and radioactive medium and other chemical products. In these fields, the ability of any valve material to resist the corrosion of working medium is relatively limited and affected by many factors. If the processing technology and heat treatment process are used properly in the manufacturing process, the corrosion resistance of this material can be guaranteed. No matter what kind of heat treatment process is used in the medium of concentrated nitric acid with concentration > 98%, this kind of steel has no corrosion resistance. Therefore, when selecting valve materials such as ball valve, gate valve, globe valve and check valve according to the nature of working medium, the influence of medium concentration, temperature and heat treatment process on corrosion resistance must be studied at the same time, so as to select better steel materials such as 316L, 904 or titanium valve.
With the continuous development of petrochemical industry technology and scale, the requirements for petrochemical stainless steel valves are higher and higher. In addition to continuously improving the quality of conventional valves, such as stainless steel globe valve and stainless steel gate valve, the demand for stainless steel ball valve with corrosive materials is increasing, such as ethylene cracking unit, polyethylene unit and polypropylene unit in ethylene production, and chemical fiber production Therefore, efforts should be made to develop corrosion-resistant technology. 316L stainless steel valve has excellent characteristics of corrosion resistance, high strength, light weight and long service life.