The hottest valve technology in China has been lef

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China's valve technology has been left behind by foreign countries for 10 years

from the "ten valves and nine leaks" of the last century to the current export of many products abroad, China's valve industry has made considerable progress. However, according to the data from the valve branch of China General Machinery Industry Association, the annual turnover of the valve market in China is as high as 50 billion yuan, of which more than 10 billion yuan of the fixed elongation stress market is occupied by foreign valve enterprises. To change this situation, improving the valve quality through innovative technology is the key

valve technology has been left behind by foreign countries for 10 years

valves account for a considerable proportion in mechanical products. According to the statistics of foreign industrial developed countries, the output value of valves is the sum of compressors, fans and pumps, accounting for about 5% of the output value of the whole mechanical industry. At the same time, as an important part of major technical equipment, especially in electric power, petrochemical, metallurgy, urban water supply and drainage systems, valves play a key role, and the consumption is very large. At present, there are more than 6000 valve enterprises in China, of which 900 have an annual output value of more than 5 million yuan

when talking about the current situation of China's valve industry, Wang Guangjie and Zhang Yanhui, professor level senior engineers of Beijing Municipal Engineering Design and Research Institute, believe that although the current development situation of the domestic plastic machinery industry is that there are low independent innovation ability and few high-grade and personalized special varieties, there are many enterprises engaged in valve production in China, but most of them are small and medium-sized enterprises. A few small enterprises have neither drawings, nor processes, nor technical personnel. The non-compliance of products greatly limits the scope of utilization of ABS materials in line with national standards, and even produces fake and shoddy products, seriously disrupting the valve market and wasting valuable resources. Many large state-owned enterprises are faced with heavy burdens, financial difficulties, outdated technology, and lack the strength to carry out technological transformation and invest in new projects. The valve technology is about 10 years away from the international advanced level. For example, some high-temperature, high-pressure and strong corrosion-resistant products cannot be produced. The valves used in offshore oil exploitation require no leakage for 10 to 15 years, and we basically cannot meet this requirement. The main line of long-distance pipeline transmission also uses foreign products, while domestic products can only be used in branch lines

it is understood that China has 2 professional research institutes, 12 factory run research institutes, about 6000 scientific researchers engaged in valve research and product development, a ministerial testing center and two sub centers, which can carry out performance tests of safety valves, steam traps and general-purpose valves, but lack of dynamic simulation test means and test equipment for high-performance parameters and high-temperature parameters. There are few scientific research institutions in the valve industry, and the number of scientific research is less than 10% of the number of employees. The ability of scientific research and development is weak. At present, it basically stays on the method of empirical design. In other words, there is still a large market space for the development of the extruder industry. Some digestion and absorption work can be carried out with reference to some foreign structures and prototypes, and there is little real product development work

from the current situation of the technical level of the foreign valve industry, relevant data show that over the past few decades, with the development of large-scale complete plant technology, a series of new complete sets of equipment and prototypes have appeared abroad, and the supporting valves also show large-scale, high parameter, automation and complete sets. And the series of new varieties are still increasing. Such as emergency shut-off valve, quick shut-off valve, fire damper and water cooling valve, etc. The basic parameters of the valve have been greatly improved. For example, the maximum diameter of the gate valve reaches 4200mm, the temperature is 1050 ℃, and the pressure is 105Mpa. Ball valve 3050mm, temperature 1200 ℃, pressure 70MPa. And foreign valve products have many varieties, good performance, reliable sealing and long service life. If the ball valve can reach more than 100000 times without leakage. Cast iron gate valve has been opened and closed for 30000 times, with reliable action and rapid opening and closing

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