Variety increase the valve product trend analysis

With the development of large-scale complete sets of foreign technology, a series of new complete sets of equipment and single machines have appeared. The development of the new valve-related plant is characterized by its large size, high parameterization, high-performance automation and complete set-up, which are compatible with the control of these complete plant sets. In the past 20 years, the control methods of foreign valves also have great development. In addition to the general manual, motorized, electric, pneumatic, hydraulic transmission, the electro-hydraulic interlocking, gas-liquid interlocking, automatic control of the growing variety of valves, and further development trend. Such as oil refining equipment. The largest refinery 36.4 million tons / year Caribbean Virgin Islands, 30 million tons / year Venezuela. At present, there are nearly 30 refineries with an annual capacity of over 20 million tons / year; the processing capacity of the largest unit refining and depressurization unit reaches 24 million tons / year; the catalytic cracking unit reaches 8.24 million tons / year; the hydrocracking unit reaches 3.2 million tons / year. Large-scale installation, forcing the valve is also growing, the control mode has begun to develop in the direction of automation. In recent years, the long-distance pipeline has developed rapidly. The main reason is that the cost is low, which is only 1/3 of that of railway transportation. Second, it is buried in the ground and is not easily damaged. Thirdly, the construction of pipeline is fast and the investment is provincial. Therefore, long-distance pipeline valves have greatly increased demand in recent years. Power generation equipment maximum unit capacity biaxial thermal power unit l30 million kW, single-axis thermal power unit 1.2 million kW, the largest nuclear power plant 1.3 million kW. With these complete sets of equipment supporting the largest valve plate valve diameter up to 1620mm, 2000mm; maximum butterfly valve diameter 9750mm; maximum ball valve diameter 3050mm, not the weight of the drive valve to 184 tons; maximum water gate valve diameter 2750mm, the pressure reached 9MPa. In summary, the economic effects of large-scale equipment are: First, to increase production efficiency; second, to reduce capital investment; third, to reduce the consumption of raw materials. With an annual processing capacity of 5 million tons of oil refining equipment compared with 1 million tons, the investment in production capacity per ton of products to reduce by 50%. A six million tonne / year refinery, compared with two 3 million tonne / year refineries, invests only 69% of the latter, 53% for steel, 54% for land and 75% for production, Labor productivity has risen to 170%. As the automation of complete sets of equipment is getting higher and higher, the main production processes of foreign petrochemical enterprises have achieved direct digital control, and some have also realized the computer grading control. Synthetic ammonia, urea, synthetic fibers, synthetic rubber and synthetic plastics and other chemical companies to achieve the tour inspection, alarm, etc., some companies have achieved some of the automation and control. At present, more than 200,000 kilowatts of foreign large-scale generating units generally develop to computer control; nuclear power plants are generally controlled by computers; many long-distance pipeline systems are controlled by computers and equipped with microwave communication systems. The total control room only requires two or three on-duty personnel , You can monitor the TV work across the board. With various types of complete sets of equipment, process and performance improvement, the series of foreign valves are still increasing, in recent years there have been many new varieties of valves. Such as: emergency shut-off valve, fast switching valve, fire damper, anti-static valve, temperature reducing valve, butterfly check valve, pressure relief valve, vacuum jacket valve, water cooling or air-cooled valve, safety gate valve, safety valve And many other new valves, including universal valve ball valve, butterfly valve and flat gate valve is the fastest growing valve varieties in 20 years.

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