Electric knife gate valve will lead to a new round of technological innovation
The biggest impact of similar foreign products on the valve industry is the application of new materials and the adjustment of the structure of similar products and the extension of performance. This kind of influence is very big and its degree is different.
The foreign development of new valve products focuses on the application of new valve materials. The electric knife-type gate valve cannot fully meet the needs of its technological development due to the existing corrosion-resistant valve materials. The output of ultra-low carbon stainless steel valves is very small, so foreign valve The industry is accelerating the development of ultra-low carbon duplex stainless steel valves. Ultra-low carbon two-way stainless steel has the ability to resist point corrosion, intergranular corrosion, and uniform corrosion under conditions of resistance to chloride ions, hydrogen sulfide, carbon dioxide, inorganic acids, and organic acids.
Second, foreign valve industry is paying more and more attention to the application of nanomaterials on valves. Nanotechnology is the cutting-edge technology for the development of science and technology in the world. In the research of nanoplastic valves, nanomaterials can only reach the sub-nanometer level in the equipment manufacturing industry, and nanometer-scale processing of powders for manufacturing valves. The original plastic particles are relatively large. After a new process, they can be neatly arranged and finely powdered particles. After sintering and high-temperature die casting, the entire cavity of the valve is obtained. The plastic valve has good corrosion resistance and is very high. The strength can replace the special stainless steel valves used in petroleum, chemical industry, especially in thermal power plant desulfurization equipment and other corrosive environments.
In addition, nickel-based nano powders are made by the carbonyl method, and the nickel-based nano powders are coated on the sealing surface using a laser coating technique or a supersonic coating technique, so that the sealing surface hardness can reach HRC 62-70, thereby improving the sealing of the valves. Surface wear, erosion resistance, corrosion resistance, thereby increasing the service life of pneumatic knife valve. Fourth, the application of ceramics on the valve, due to ceramics can greatly improve the corrosion resistance of the valve, the service life and sealing performance is better than carbide, ceramics used as a seal vice, such as the instrument valves used in power plants are mostly ceramic ball Sealed, with high hardness, high temperature, long life and other advantages. Fifth, the development of different uses of rubber, such as hydrogenated nitrile rubber (HNBR) on the resistance to hydrogen sulfide corrosion, can be applied to the valve sealing surface. Hydrogenated acrylonitrile-butadiene rubber (HNBR) can be applied to the valve seat of the API6A gate valve so that the gate valve has a high lifetime and is resistant to hydrogen sulfide corrosion.
The impact of advanced updates of foreign products of the same kind on China's valve industry mainly manifests itself in: substitution of key valve products for China's key projects; occupation of its vast market; intensifying market competition among China's valve industry, etc. From this point of view, , The impact of foreign similar products on the domestic valve industry can not but be said to be another worrying issue!
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