In the development of the national economy, the valve industry plays an important role as an important link in the preparation of manufacturing. As China's domestic valve manufacturing industry still has a certain gap compared with the international advanced level, many key valves with high parameters, high temperature and high pressure and high grade have always relied on imports. In order to promote the localization of valves, the State Council issued the "Regulations on Accelerating Revitalization". After the "Opinions on Equipment Manufacturing Industry", the relevant state departments have made a series of major deployments according to the requirements of the localization of major equipment made by the state, and led by the National Development and Reform Commission. The China Machinery Industry Federation and the China General Machinery Industry Association, The valve localization plan for major equipment in related fields was deployed and coordinated with relevant departments. Nowadays, valve localization has reached a consensus in the domestic valve industry. After 20 years, especially in recent years, research, design, manufacturing and user phase The joint efforts and joint research have been fruitful. In the "West-to-East Gas Transmission", "South-to-North Water Transfer", "Three Gorges Water Control Project", one million kilowatt nuclear power unit, one million tons of ethylene transformation project, supercritical and ultra-supercritical thermal power units, oil and gas pipeline transportation, coal chemical industry, large ships, urban sewage In dealing with major engineering equipment projects and nuclear power, petrochemical, metallurgical, power station and other fields, in addition to a small number of high-parameter safety valves and regulating valves to be imported, the localization of valves has been realized, thus changing the situation that major equipment critical valves have long been subject to foreign countries. . And strive to achieve localization of major engineering projects and key valves in the short term, or partially localization, so that China's valve manufacturing industry is in the forefront of the world.

Speeding up the pace of localization of valves from scratch China's localization of valves has always been a long way to go. At the beginning, China advocated the localization of valves, which was not smooth sailing. It also encountered layers of resistance, and more was controversial. After the older generation of valve industry experts and the nuclear industry part of the scientific research department to tackle and coordinate, can use domestic, resolutely use domestic, in the localization as much as possible to fight the ball, save the country for foreign exchange.
China's valve localization was nothing at all, starting from scratch, and starting from the nuclear power plant and nuclear chemical industry, as well as petrochemical equipment, in the 1980s, the first 600,000 nuclear power units related projects on the project, and later When engaged in the Qinshan Nuclear Power Plant, Ningbo Valve Factory, as a pilot enterprise for the localization of nuclear engineering pipe fittings, contributed to the localization of valves. After the reform and opening up, China has increased the localization of valves. With the continuous improvement of the manufacturing process of the valve industry, many enterprises have adopted advanced resin sand unboxing molding lines to produce casting blanks. The chemical composition of castings is analyzed by direct reading spectrometer for rapid analysis. Cobalt 60 γ-rays detect defects in castings; forging uses advanced processes such as tire die forging and multi-directional die forging. After entering the 21st century, the pace of localization of valves has accelerated, and the localization of major engineering projects has achieved results.
After the State Council issued the "Several Opinions on Accelerating the Revitalization of the Equipment Manufacturing Industry," the equipment manufacturing industry was fully revitalized. To this end, the National Development and Reform Commission, the China Machinery Industry Federation and the China Association for International Relations and other relevant state departments have long put forward plans to gradually realize the localization of major equipment valves during the 10th Five-Year Plan and the 11th Five-Year Plan period, which proposes to achieve a million kilowatts. The key valves of nuclear power plants, the localization of valves for large-scale ethylene complete sets of equipment, etc., through the introduction of key technologies and independent development, and many preferential policies and policies, so the relevant valve companies seize the opportunity to actively prepare the country Localization of valves. Consensus has been formed up and down, and the localization of valves has made gratifying progress.

Significant progress in the localization of nuclear power valves The key valves for nuclear power plants are important equipment for nuclear power plants. For a long time, they have mainly relied on imports. Foreign countries have been imposing technical blockades on China to earn high profits, which has become a bottleneck restricting the localization of nuclear power in China. one. The development of domestic nuclear valves began in the early 1960s. Up to now, after several decades of efforts, China has formed a large-scale nuclear-grade valve design, experiment, manufacturing, testing capabilities, and provided a large number of nuclear-grade valves for the first phase and second phase construction of Qinshan Nuclear Power Plant. Made an important contribution.
Domestic key enterprises have taken active actions to actively overcome difficulties and worry about the country, and have provoked the burden of localization of nuclear valves for R&D and manufacturing. A group of old enterprises such as China Nuclear Su Valve, Shenyang Shengshi, Dalian Dagao, etc., have obtained the qualification to design and produce nuclear valves, and achieved results in the process of localization of nuclear valves in China. At present, 19 enterprises in China have obtained the qualification certificate for the design and production of civil nuclear pressure equipment issued by the National Nuclear Safety Administration, and can design and produce nuclear valves. Its design and production of valves are gate valves, globe valves, regulating valves and so on. Among the 19 companies, there are 5 companies that design and produce nuclear grade I valves (China Nuclear Su Valve, Shen Gao, Da Gao, Shang Valve, Shanghai Lianggong). At present, China has successfully developed high-level nuclear cores such as pressurized water reactor nuclear island nuclear I-level electric gate valves, check valves, electric bellows shut-off valves, and nuclear neutron bellows valves for fast neutron breeder reactors. valve. In 2003, Zhongnuo Su Valve declared the project “Research and Development of Key Valve Design and Manufacturing Technology for Nuclear Power Plants” to the Commission of Science, Technology and Industry for National Defense, and decided to fully develop key valves for five types of nuclear power plants, breaking through the international monopoly. In 2006, the National Development and Reform Commission commissioned the China Machinery Industry Federation to examine and demonstrate the three nuclear power valve localization projects of China Nuclear Su Valve, Shenyang Shengshi and Dalian Dagao “Million kilowatt-scale PWR nuclear power plant valve localization industrialization project”. Later, it will form the core force of the national nuclear valve localization, so that China's nuclear power projects under construction will no longer be subject to people.
Last year, with the commencement of the second generation of improved nuclear power projects such as Hongyanhe and Ningde, and the introduction of the three-generation nuclear power technology after the introduction of Sanmen and Haiyang, the localization of nuclear power equipment has made significant progress in the past two years. Relying on the second phase expansion project of Qinshan Mountain, in recent years, the valve industry has successfully developed domestically advanced nuclear-grade valves, and the valve manufacturers that have passed the technical appraisal have: the nuclear-grade quick-opening isolation valve has been completed. 14 kinds of specifications and varieties of prototypes such as regulator electric pressure relief valve, low pressure differential swing check valve and nuclear secondary hard seal containment air duct isolation valve, and passed various types of tests and provincial level Identification; nuclear secondary containment isolation butterfly valve of Jiangsu Shentong Valve; nuclear grade shut-off valve, gate valve and check valve of Dalian Dagao Valve; main steam isolation ball valve of Shanghai Valve Factory; nuclear-grade main steam of Dongwu Machinery of Wujiang City, Jiangsu Province Safety valve and nuclear 2, 3 auxiliary system safety valve; Zhejiang Global Valve Group's nuclear 2 stage shut-off valve; Jiangsu Changzhou Power Station Auxiliary Machinery Factory HZD, HQB type 1E nuclear-grade valve electric device; Yangzhou Electric Power Equipment Repair Factory Nuclear-level valve electric actuator with buffer device; nuclear-grade K1 valve electric device of Tianjin Tian Ertong valve; nuclear-grade air isolation valve of Shijiazhuang Valve No. 1 factory; nuclear of Suzhou Newway valve Grade electric shut-off valve, nuclear secondary electric ball valve, nuclear three-stage electric butterfly valve; and nuclear first-class electric gate valve and nuclear first-stage swing check valve of Shenyang Shengshi high and medium pressure valve and nuclear grade valve products of Suzhou high and medium pressure valve factory A number of nuclear grade valves have successively passed the new product technology appraisal hosted by the National Machinery Industry Federation and other scientific research departments. Recently, Zhongnuo Su Valve has completed the development of nuclear, first-class nuclear fast-opening isolation valves, proportional spray valves, hard-sealed containment air isolation valves, electric pressure relief valves, main steam isolation valves, etc. Relevant assessments such as type tests and completion of cold functional tests to meet nuclear power engineering needs.
At the same time, in the C2 project of the second phase of the Chashma Nuclear Power Plant in Pakistan, except for the control valve with high technical content, the others are all localized, including the nuclear release valve, the back pressure regulating valve and other nuclear 2, nuclear 3 pneumatic The regulating valve part is provided by Shanghai Automation Instrument No.7 Factory; the process valve is partially provided by Zhongnuo Su Valve, and the electric actuator is provided by Tianjin Baili Second Pass. Nuclear power electric gate valve provided by Zhejiang Huadong Valve.
In the past two years, nuclear valve manufacturers have made progress in the research and development of some key nuclear valves with the owners of China Guangdong Nuclear Power Group and China National Nuclear Corporation. According to the current bidding situation of the nuclear valve of Qinshan and Hongyanhe projects, combined with the existing capabilities and performance of the valve industry, the localization rate of the valves of Hongyanhe No.1 and No.2 units will reach about 35%; after another 1-2 years of research and R & D, nuclear valve manufacturing will have a major breakthrough, the localization rate in the Hongyanhe units 3 and 4 is expected to achieve 60%.
With the successful development of nuclear valves, it marks that some products of China's valve industry have entered the high-end field, reflecting that China's valves have reached a certain level of manufacturing. The market space of this product is vast, which also provides new opportunities for the development of the valve industry. CGNPC and China Nuclear Supreme Valve, Dalian Daga Valve and Jiangsu Shentong Valve signed the "National Nuclear Power Valve Localization Development Cooperation Agreement", which marked that the joint development of nuclear valves by CGNPC and domestic valve companies has been fully launched.

High-end valves have been developed rapidly. 1. High-end valves have been localized. In the previous year, the 5-meter super-large-diameter vacuum butterfly valve independently developed by Jiangnan Valve Company and undergoing hundreds of experiments was put into production. The first domestic valve entered the large-scale national defense wind tunnel test. The two-way vacuum sealing butterfly valve and the special pressure regulating valve are provided for the test device, which promotes the important contribution of the "嫦娥" to the moon. In 2005, the company successfully developed the world's first zero-leakage "regulating metal sealing butterfly valve", replacing the gate valve and globe valve with larger energy consumption and material consumption, and successfully developed the closing time of 0.5 seconds below the international standard. Electro-hydraulic linkage quick closing valve "localized high-end valve.
China Nuclear Su Valve and Suzhou High and Medium Pressure Valves and Lanzhou High Pressure Valves provide a number of high-end domestically produced valves for China's nuclear chemical systems. Among them: Zhongnuo Su Valves were originally developed in the 60-70s, and were independently developed torpedo vacuum valves and drum vacuum valves. The products have been mass-produced as the main products of localization, making the key valve torpedo vacuum valve of the nuclear chemical system localized. Shanghai Valve Factory has participated in many major national projects in the past 40 years. For example, in 1962, it provided stainless steel valves to the national nuclear chemical enrichment uranium project.
Recently, the localization of key valves has also achieved results: Baoyi Valve Group and Zhejiang University jointly developed high-end ultra-low temperature series valves. Zhejiang Chaoda Valves provides a number of high-temperature wear-resistant metals for Shenhua Group to undertake the “coal to hydrogen production” localization equipment. Hard-sealed domestically produced ball valve; Lanzhou High Pressure Valve Co., Ltd. has successfully developed a high-pressure slab gate valve for high-sulfur natural gas valves independently developed by Sinopec Puguang Gas Field. Jiangsu Yangzhong Valve Factory has developed a series of special valves for sulfur recovery equipment that are energy-saving and environmentally friendly. Etc., and gradually promote the application throughout the country, so that these high-end valves have been localized. Beijing Aerospace Petrochemical Technology Equipment Engineering Co., Ltd. has developed two new localized products, namely “safe valve quick switching device that meets backup bleed capacity” and “non-flowing open pilot safety valve”.
Zhongnuo Su Valve and Lanzhou High Pressure Valve have become the main suppliers of domestic special valves for large-scale ethylene complete sets of equipment for millions of tons of ethylene. The self-developed hydrogenation unit valve clearing slab gate valve has been successfully applied to Dongfang Chemical Plant. Engineering. In this field, only the annual supply of special valves of nearly 100 million yuan in this field has specially organized technical research and research and development, which has made a major breakthrough in the localization of large-scale ethylene complete sets of special valves. Zhejiang Huadong Valve successfully developed hydrogenation valves and ethylene valves, and solved the technical problems through continuous efforts. Developed the first new products such as hydrogenation valves and ethylene valves in China, as well as the non-wearing spherical check valves of Chengdie, Chengdu Huake. Low-temperature test device, high-temperature test device; "CO2 stripping method urea special high-pressure regulating butterfly valve" developed by Sijie Chemical Co., Ltd. The wear-resistant slag gate valve developed and produced by the second medium-pressure in Zigong City, the high-temperature ball valve developed by Kaitz; The intelligent valve industry's encrypted anti-theft watch front valve has rewritten the history of domestic hydrogenation valves relying on imports. Hongcheng Valve successfully developed a large-diameter turbine inlet hydraulic butterfly valve, a ring-jet flow control valve, a 2.5-meter turbine inlet ball valve and a 3-meter vacuum butterfly valve.
2, supercritical, ultra-supercritical generator sets and thermal power station valves localized Harbin Haguo valve facing the foreign company's blockade of valve technology, in 2004 developed China's first supercritical plugging valve, and successively developed for Yuhuan Power Plant The supercritical unit supporting the supercritical unit of the 1st unit million-kilowatt ultra-supercritical unit is equipped with high-end valves such as steam and water supply shut-off valves, check valves, hydraulic test plugging valves and supercritical units with full-size safety valves and large-diameter gate valves. At present, the supporting facilities have been successfully connected to the grid. This indicates that China has mastered the most advanced ultra-supercritical thermal power generation technology in the world, and has also made China's power generation equipment manufacturing capacity and technical level a step. They also succeeded in the large-caliber high-temperature and high-pressure forging welding power station stop valve last year.
Henan Kaifeng high-pressure valve is the most localized million unit - Huadian International Zouxian Power Plant #8 unit ultra-supercritical generator set, successfully developed 2X1000MW ultra-supercritical generator set electric blow pipe control valve and other batch of valves, to achieve the largest domestic unit The valve with the highest parameters and the largest diameter is localized. In the related fields, it has created a number of “National First” and made significant contributions to the localization of special valves for ultra-supercritical generator sets in China. Zigong Dongfang Boiler Valves provided 172 units for the 600MW supercritical unit Datang Xiangtan No.1 furnace. Forged cut-off valves, and boiler supporting valves for subcritical and supercritical parameter units; Southern Valve Company has also successfully developed supercritical and ultra-supercritical domestically produced valves, which have reached advanced levels.
3, the pipeline key valve localization Zigong high pressure valve large diameter all welded forged steel pipe ball valve, Shanghai Nai Les James Burley valve three-stage structure pipeline valve, Chengdu wind valve large diameter slab gate valve, Suzhou New Wei valve ball valve Successful application on the “West-East Gas Pipeline” pipeline. Suzhou Nuwei Valve and Zhejiang Wuzhou Valve have successfully developed a 56-inch ultra-large-diameter long-distance pipeline full-welded ball valve with a weight of 40 tons, which is the highest in China; the first fully welded ball valve developed by Bethel Valve Group. The product is specially used for the laying of underground oil pipelines. The fully welded pipeline ball valve independently developed by Shanghai Nai Les James Burley Valve has passed the national technical appraisal; Lanzhou high pressure valve has established the production scale and technology of producing high pressure valves as the leading products. The equipment level is in the leading position in the industry, and is currently building a large-scale production and manufacturing base of Lanzhou Pump and Valve Group.

The future development direction of valve localization In the process of localization of valves, according to China's equipment manufacturing industry, especially the position of the valve industry in the development of national economy, valve companies pay attention to strengthening the ability of independent innovation, aiming at major national industries. Projects, major scientific and technological innovation projects, implementation of key breakthroughs, adjustment of our company's product structure, creation of the company's independent innovation system, comprehensive improvement of the company's comprehensive competitiveness, so that enterprises face fierce market competition and the technical and economic needs of various industries. Let each of our companies contribute to the localization of valves.
Zhang Zonglie, executive vice chairman of China Tongxie Valve Branch and chief engineer of Zhongnuo Su Valve, recently put forward specific directions and requirements for the localization of valve development in the whole valve industry, and clearly realize the goal of further localization of valves: in the future, nuclear power valves, In the ultra-supercritical thermal power generation technology, high temperature and high pressure valves are the main research and development direction, and the key technologies require us to make breakthroughs. In large-scale pumped storage power plants, large-diameter ball valves are also proposed, including castings and forgings, control and design. Technology; in the large-scale nuclear power plant project of millions of kilowatts, including valve design, manufacturing, laboratory testing, type testing and other heavy-duty projects; in the large-scale ethylene, energy conversion coal chemical, PTA large-scale equipment and other special equipment and space shuttle operation Need a key valve. We will set clear goals for the future development and technical research of our valve industry. We must establish a platform for product R&D and industrial innovation in the entire industry, so that our company can form a technological innovation system. However, the entire valve industry still has gaps in terms of product quality and high-precision fields. In general, it cannot adapt to the needs of the development of national high-tech industries. In the petrochemical industry, such as high-pressure polyethylene, high-pressure Pober pipe valves and ethylene cracking furnaces. Clear focus plate valves, high-temperature high-pressure or ultra-low temperature key valves of more than 2,500 lbs of ethylene are also required to be imported. Some special-purpose valves, including various structural trousers, sleeve valves, jacket valves, and control system control valves, all rely on imports. As the main main energy direction of the country in the future, coal chemical industry is hydrogenated in coal and stone. After heating and hydrogenating, the requirements on the material and structure of the valve are high. Many of the national conditions need to be cast, and the key castings need to be overcome.
Nuclear-grade valves require reliable sealing performance. At present, the key nuclear valves of several major nuclear power plants in China rely on imports. Although the technology of the valve is well overcome, the gap between the valve drive devices is greater, and many key drive devices are imported. There are gaps in the series of complete sets and special working conditions. For example, many national key projects, such as high-parameter, environmentally friendly, and energy-saving valves, rely on imports. It is necessary to understand the localization of valves in key industries and projects in the country, and strive to achieve the full localization of Chinese valves.
Mr. Zhang also said: The valve industry should base itself on optimizing industrial structure, energy conservation and environmental protection, independent innovation, reform and opening up, and people-oriented, and accelerate the establishment of a new technology development system with independent development and innovation capabilities. The valve industry's products to the end of the "Eleventh Five-Year" localization, in the large-scale ethylene special valves to cover 95-100%, coal chemical special valves are mainly high-temperature hydrogenation key to solve the material sealing pair, there are some control drive The device should also reach more than 90%; the ultra-supercritical thermal power plant technology and so on, the valve localization ratio should reach 80%-100%. To achieve the localization of key valves and key technologies, the task is arduous. As long as our valve counterparts work together, around the same goal, the localization of valves will be realized.

Seize the opportunity to promote localization and then go up the steps. Ye Jixuan, executive vice president of China Valve Association, clearly stated in the second session of the Fifth Valve Association in 2008 that the valve industry plays an important role in the development of the national economy as an important part of the manufacturing industry. The role of the important areas of national economy and people's livelihood, such as millions of kilowatts of nuclear power, large clean high-efficiency power generation, supercritical thermal power, gas steam cycle, large-scale hydropower and pumped storage, large air-cooled power stations and other large-scale circulating fluidized bed boilers; Million tons of large-scale ethylene complete equipment, para-xylene, phthalic acid, polyester equipment; large-scale coal chemical equipment; large-scale coal mining, lifting and washing equipment; large ships, large chemical ships, aircraft carriers, CNG; Governance, urban industrial wastewater treatment, urban pipe network transformation and other aspects require a large number of domestically produced valves for matching, to meet the requirements of the national economy industry for valve manufacturing, to achieve the scientific development of the entire industry, take the lead in development, good and fast development, grasp Live in domestic and international market opportunities, forge ahead, and strive to make China a global valve The main production base.

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