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Valves are devices used to control fluid flow, pressure and flow direction. At present, our country has been able to develop and produce most of the valves. However, valves are products with low profit margins and the market competition is very fierce. From a market perspective, there are more than 2,000 valve companies of a certain scale in my country, most of which are located in Jiangsu, Zhejiang and the Central Plains. Technically speaking, although my country's valves started late, through the introduction of advanced technologies and processing equipment such as the design and technology of similar foreign products, they have now basically reached the level of foreign countries in the 1980s. Current situation of my country's chemical valve market my country's chemical valve market is divided into new construction and expansion project markets ； Old equipment repair and renovation project market. Judging from these two markets, the supply of ordinary valve products exceeds demand. Secondly, companies are suppressing each other, competing disorderly, and engaging in counterfeiting... The market is very irregular, causing some valve manufacturers to suffer substantial losses year after year in the fierce competition. Judging from the needs of these two markets, with the development and improvement of the market economy, especially the progress of the World Trade Organization (WTO), the market changes are getting bigger and bigger. Enterprises are increasingly affected by the market. Users have higher and higher demands for market products, and the demand for product development and production cycles is getting shorter and shorter. At present, domestic key valve production enterprises have been able to design and manufacture various valves in accordance with international standards such as ISO international standards, DIN German standards, AWWA American standards, etc., and the products of some manufacturers have reached the international advanced level. Although the overall level of the valve industry has been greatly improved during the New Year, the quality is not stable enough, and phenomena such as running, popping, dripping and leaking often occur in domestic valves. In addition, the supporting capabilities of my country's valves are also in line with those of developed countries. * * There is still a certain gap in comparison. in: Refining equipment uses valves. Most of the valves required for oil refining equipment are pipeline valves, mainly gate valves, globe valves, check valves, safety valves, ball valves, butterfly valves, and traps. Among them, the demand for gate valves accounts for about 80% of the total number of valves (valves account for 3% to 5% of the total investment in the equipment). Valves for chemical fiber equipment, chemical fiber products mainly include polyester, acrylic, and vinylon. The required valves are ball valves and jacketed valves (jacketed ball valves, jacketed gate valves, jacketed globe valves). Valves used in acrylonitrile devices generally require valves produced according to API standards, mainly gate valves, globe valves, check valves, ball valves, traps, needle valves, and plug valves. Among them, gate valves account for about 75% of the total valves. Due to the different ammonia synthesis sources and purification methods, the valves used in ammonia synthesis equipment have different process flows, and the technical performance of the required valves is also different. At present, domestic ammonia synthesis plants mainly use gate valves, globe valves, check valves, traps, butterfly valves, ball valves, diaphragm valves, regulating valves, needle valves, safety valves, and high and low temperature valves. Among them, stop valves account for 53.4% of the total valves used in the device, gate valves account for 25.1%, traps account for 7.7%, safety valves account for 2.4%, regulating valves, cryogenic valves and others account for 11.4%. Valves for ethylene devices, ethylene devices are the leading devices in the petrochemical industry, and they require a wide variety of valves. Gate valves, globe valves, check valves, and lift rod ball valves account for the majority, among which gate valves rank first. “In the Tenth Five-Year Plan, 6 sets of ethylene plants with an annual output of 660,000 tons need to be built across the country, and the demand for their valves is considerable. In addition, large-scale ethylene and high-pressure polyethylene equipment also require ultra-high temperature, ultra-low temperature and ultra-high pressure valve series products. Valves are used in air separation units. "Air separation" means air separation. This unit mainly requires stop valves, safety valves, check valves, regulating valves, ball valves, butterfly valves, and cryogenic valves. Valves for polypropylene devices. Polypropylene is a polymer compound made of propylene as raw material and polymerized. This device mainly requires gate valves, stop valves, check valves, needle valves, ball valves, and traps. Future Outlook of the Valve Market The largest users of valves are the petrochemical industry, power sector, metallurgical sector, chemical industry and urban construction sector. The petrochemical industry mainly uses API standard gate valves, globe valves and check valves ； The power sector mainly uses high-temperature pressure gate valves, stop valves, check valves and safety valves for power stations and some low-pressure butterfly valves and gate valves for water supply and drainage valves. ； The chemical industry mainly uses stainless steel gate valves, globe valves, and check valves ； The metallurgical industry mainly uses low-pressure large-diameter butterfly valves, oxygen stop valves and oxygen ball valves ； The urban construction department mainly uses low-pressure valves, such as large-diameter gate valves mainly used in urban water pipes, centerline butterfly valves mainly used in apartment construction, and metal-sealed butterfly valves mainly used in urban heating. ； Oil pipelines mainly use flat gate valves and ball valves ； The pharmaceutical industry mainly uses stainless steel ball valves ； The food industry mainly uses stainless steel ball valves, etc. Due to changes in user needs, the market trend of valve products will also undergo corresponding changes. The main development trends in the future are as follows: 1. With the shift of oil development to inland oil fields and offshore oil fields, and the development of the power industry from thermal power below 300,000 kilowatts to thermal power, hydropower and nuclear power above 300,000 kilowatts, valve products should also change their performance and parameters according to changes in equipment application fields. ； 2. Urban construction systems generally use a large number of low-pressure valves, and are developing towards environmental protection and energy saving. That is, the low-pressure iron gate valves used in the past are gradually transitioning to environmentally friendly rubber plate valves, balance valves, metal seal butterfly valves and centerline seal butterfly valves. Oil and gas transmission projects are developing in the direction of pipelines, which in turn requires a large number of flat gate valves and ball valves. ； 3. The other side of energy development is energy conservation. Therefore, from the perspective of energy conservation, steam traps should be developed and developed towards subcritical and supercritical high parameters. ； 4. The construction of power stations is developing towards large-scale development, so large-diameter and high-pressure safety valves and pressure reducing valves are required, as well as quick opening and closing valves. ； 5. In response to the needs of complete sets of projects, the supply of valves has developed from a single variety to multiple varieties and specifications. There is an increasing trend that all valves required for an engineering project are provided by one valve manufacturer.