From 60s to 02 units (the Ministry of nuclear industry), 194 developed an electric high temperature cut-off valve suitable for the support of military workers at 750 centigrade; in 1970, all kinds of stainless steel valves of all kinds of stainless steel valves used in the 49-3 project (Sichuan Jiajiang high throughput engineering nuclear test reactor) were all 27 specifications and 644 sets. At the same time, the stainless steel valve used in the fuel uranium unit 820 is also made for the combustible unit. It provides DN1000 large diameter and high pressure electric valve for the wind tunnel test of the 03 unit high speed fighter. It provides all kinds of valve products for the 09 nuclear submarine engineering. To this end, the defense science and Technology Commission awarded the defense scientific research achievement award. In the "Sichuan gas out of Sichuan" project in 1975, the first DN1000 PN80 gas and liquid linkage emergency truncated ball valve was developed in China, the National Science Conference award was awarded in 1978, and the DN200 to DN700 series of ball valves in 1983 were awarded the national "Golden Dragon", which became the domestic fixed-point ball valve production enterprise.

During the period of "75", the exclusive technology of the KTM ball valve of the North Village Valve Co., Ltd. was introduced. On the basis of the digestion and absorption, the whole series of steel ball valves, the stainless steel ball valve used in the petrochemical industry, the oxygen ball valve used in the metallurgical industry, and the water used in the hydropower industry were developed. Electric ball valves, large caliber explosion-proof electric ball valves, high temperature pneumatic remote control ball valves, emergency truncated ball valves, three and four ball valves, adjustment ball valves, large diameter forging steel ball valves and other high technical ball valves meet the national key projects and large project construction needs, and further improve the market competitiveness, especially oxygen special purpose. The successful development of the two national key new products of ball valves and large caliber hydraulic ball valves has greatly expanded the application field of the original imported technology and improved the competitiveness of the market further. At present, there are few manufacturers in China that can produce large diameter DN400 long distance pipeline valves.

In June 2001, according to the content of the complete equipment for the west to East Gas Transmission Project of the national major technical equipment, from the market demand and the expansion of domestic demand, the strategy of building the production base of the Asiatic ball valve in new villa (GE) was signed by the valve and GE. "New - self technical authorization and technical support" contract, the comprehensive introduction of GE new scale valve technology, including the split type, welding, top mounted ball valves, as well as general valve, automatic control valve, check valve and all GE existing valve technology as well as the development and development of the latest valve development and development of the latest valve development. The comprehensive introduction of GE technology and the new and comprehensive cooperation have reconfirmed the leading position in China and Asian valve technology and reached the world's advanced level. Its products can meet the requirements of long distance pipeline project and adapt to the environment of land and sea.

On the basis of the introduction of the advanced valve technology of GE new beer, on the basis of digestion and absorption, the special welding center of ESAB ball valve is imported from Italy, and the advanced equipment such as turning center, ball machining center, CNC lathe, NC boring machine and so on are purchased, and API and DIN have been adopted on the technical equipment. The batch production capacity of special process valves and pipeline valves from 1/2 "to 60" (DN15 to 1500), pressure from ANSI 150 to 900Lb (PN20 to 150MPa), temperature range from -60 to 250 C, is designed by BS and other international advanced standard specifications. The first prototype of the 40 "600Lb full welded steel pipe line ball valve with all welded structure for the west to east gas pipeline was developed and developed in China. The product evaluation of the domestic authoritative experts organized by the China Machinery Industry Federation was passed in April in 2002, and the technical performance, technological level and production of the product were made. The ability and quality assurance system have been fully affirmed, and the indicators have reached the level of similar products in the world. Its unique valve structure design has greatly improved the service life of valves. The large diameter valve, which marks the west east gas pipeline project, has been manufactured in China, and has been listed in the national key a new product by the Ministry of science and technology. It has become the only domestic valve enterprise participating in the main pipeline project of the west east gas transmission pipeline and the famous foreign major platform, which has made great contributions to the construction of the national west east gas transmission project. In the west to east gas transmission line project and the city gas pipeline network transformation project, it has beaten the world famous valve manufacturers many times and won the bid. It has become the only valve enterprise in China to be recognized by the leading group of the national west east gas transmission project construction. The product has been successfully applied to various major projects in the Pearl River Delta oil products pipeline, southwest finished oil pipe line, Tianjin City pipe network, Yonghu Ning pipeline, Hebei natural gas utilization project, West to east gas transmission line, Ma'anshan natural gas project and so on, and exported to Spain, Mexico, Indonesia, Pakistan and other foreign countries. The market has broad domestic and overseas market prospects.

For decades, with strong technical and equipment ability, excellent products and high quality service, the main pipeline valves and urban gas supply valve market are occupied. The products of the valves are directly served in oil, natural gas pipeline and natural gas city pipe network. The products are safe and reliable in Northeast, northwest and China. North, East, southwest and Sichuan's oil and gas gathering and transportation pipelines, as well as petrochemical, chemical, metallurgical, power, paper, medicine and other industries. In Asia, the Middle East, North America and South America, this "flying ball" valve product also enjoys high reputation.

In China's current valve market, in addition to low pressure valves to achieve acceptable level in the international market, high pressure valves still need to rely on imports. In the situation of sustained macroeconomic situation, the production and sales indicators of most enterprises in the valve industry have maintained rapid growth, but affected by the price war, the sales revenue and profit of the industry fell sharply compared with the same period of last year. With the warming of the world economy, the import and export of China's valve products has also increased, but there is still a big gap in the high-end technology compared with the foreign manufacturers. In the next period, the product technology will become a bottleneck restricting the development of China's valve products.

From the point of view of the product, China's valve industry has been able to produce more than a dozen large categories of products, such as gate valve, cut-off valve, ball valve, butterfly valve, safety valve, check valve, throttle valve, cock valve, pressure relief valve, diaphragm valve, drain valve, emergency shut-off valve and so on. The maximum use temperature is 570 degrees C, the lowest is -196 C, and the maximum pressure is 6 00MPa, the maximum path reached 5350 mm. In addition, according to statistics of relevant departments, China's annual turnover of the valve market is as high as 50 billion yuan, of which about 10000000000 Yuan is occupied by foreign valve enterprises. Valves are essential fluid control equipment for oil, chemical, power plants, long-distance pipeline, shipbuilding, nuclear industry, all kinds of low temperature engineering, aerospace and marine oil production. After years of development, the number of valve enterprises in our country is the first in the world. There are about 6000 enterprises of various sizes and valves, of which there are 900 annual output value of more than 5 million yuan.

At present, there are still some problems in China's valve industry. For example, China's valve enterprises are mainly low-level, small-scale and family workshop type enterprises. In terms of products, due to repeated investment and insufficient technology import, the leading products of China's valve enterprises are still low-quality mass products. At present, all kinds of valves produced in China's enterprises have the disadvantages of leakage, leakage, low appearance quality, short life, inflexible operation, and unreliability of valve electric device and pneumatic device. Some products are only equivalent to the international level in the early 80s of last century, and some valves on high temperature and high pressure and key devices are still needed. Rely on import.

In addition, the valve industry in China has a large gap with foreign enterprises in the industrial structure, the valve industry chain and the professional degree of the industry. The reason for the low quality of domestic valve products is that the original state-owned valve enterprises are turning to the same level because of the rapid expansion of the market, although a batch of township enterprises are in high speed. Rapid development, but because of the low starting point of the township enterprises, the technical force is very weak, the equipment is simple, most of the products are imitation of production, especially the problem of low pressure valves for water supply and drainage, but the above problems do not affect the broad prospects of the future China's valve industry. This is mainly due to the support of the national policy and the strong demand of the valve product market. In particular, several projects such as "west to East Gas Transmission", "west to east transmission", "south to North Water Transfer" and other projects need a large number of valve products.

In addition, China is facing the advent of the industrialization era, the petrochemical industry, the electric power industry, metallurgical industry, chemical industry and urban construction and other large valve will enhance the demand for valve products. For example, in the "11th Five-Year" period of the power industry, the total demand for the large and medium sized projects in the coal and electricity generating units is 153 thousand tons, the annual demand is 30 thousand and 600 tons, the total demand of the valve is 3 billion 960 million yuan, and the annual demand is 792 million yuan. In addition, China is becoming the largest processing plant in the world. The processing and manufacturing of valve products is facing greater development space. As long as enterprises can seize the opportunity, strengthen the R & D capability, continuously improve the product technology content and product quality, they can occupy the active position in the fierce market competition.