Status of foreign valve industry
With the rapid development of large foreign industries, the production development of the valve industry is also very rapid. Before the 1950s, many countries formed independent valve professions and their industry systems, and there were valve industry organizations or valve professional academic organizations. These valve industries and professional organizations were established to improve production technology and the needs of external competition.

The composition of the valve industry in several major industrial developed countries is as follows:

Number of employees in the valve industry (taking 1990 as an example) There are 77,500 employees in the United States, of which 70% are workers, 30% are in technology and management; 80,000 in the United Kingdom; 52,500 in Germany; 35,000 in Japan; 15,000 in Italy; and 11,519 in France .

Total number of valve manufacturers
900 in the U.S. with the largest number of companies of 3,500; 1507 in Japan with the largest number of companies of 900; 450 in Germany with the largest number of companies at 3300; 490 in the UK with largest number of companies at 1100; 400 in France with largest number of companies at 1,000; It can be seen that the largest number of valve manufacturing companies is Japan, and the largest number of employees is the United States. Japan''''s valve industry employs only one-half of the United States, and the total number of companies is nearly double that of the United States. Compared with the United States, Japan''''s valve industry is mostly small and medium-sized, with about 250 larger companies. Since the 1980s, the number of employees in the valve industry in all countries has decreased by a small degree, and the largest reduction has been in France, from 21,000 in the 1980s to 11,519 in the late 1980s (1988).

Total valve output value (take 1990 as an example)
The United States was 10.74 billion US dollars, Germany was 7.958 billion German marks, Japan was 84.143 billion yen, France was about 6.100 billion francs (1987), and the United Kingdom was 6.01 billion pounds (1986).

Valve International Trade
The international valve trade market has been very active in recent years, and competition has been fierce. The stronger players are Germany and the United States. Germany is the world''''s largest valve exporter. In 1985, Yirenli''''s valve trade exceeded the United States, ranking second. In 1987, the proportion of total valve imports and exports in industrial developed countries was: Germany 22.2%, Italy 16.5%, the United States 10.9%, Japan 10.7%, and France 9.7%. In 1985, the world ’s top eight valve import and export trade rankings are as follows: Germany 2739.8 million German marks, Yirenli 2127.5 million German marks, United States 1833.1 million German marks, Japan 1683.5 million German marks, France 1545.7 million Germany Mark, UK 1376.7 million German mark.

Technical level of foreign valve industry
Complete sets of level For more than 20 years, with the development of large-scale foreign complete sets of technology, a series of new complete sets of equipment and stand-alone machines have appeared. The development of new complete sets of equipment related to valves is characterized by large-scale, high-parameterization, high-performance automation and complete sets. Economic effects of large-scale equipment: In summary, one is to improve production efficiency, the other is to reduce infrastructure investment, and the third is to reduce the consumption of raw materials. In the past 20 years, foreign valve control methods have also developed greatly. In addition to the general manual, motorized, electric, pneumatic, and hydraulic transmission, the types of valves with electro-hydraulic linkage, gas-hydraulic linkage, and automatic control continue to increase, and there is a further development trend.

Series Variety Level
With the improvement of various complete sets of equipment, technological processes and performance, the series of foreign valves is still increasing, and in recent years many new types of valves have appeared. Such as: emergency shut-off valve, quick-open valve, fire valve, anti-static valve, temperature reducing and reducing valve, butterfly check valve, pressure relief valve, vacuum jacketed valve, water or air cooling valve, safety gate valve, safety shut-off valve and many other new types of valves, among which the ball valve, butterfly valve and flat gate valve are the fastest growing valve varieties in 20 years.

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