With the development of overseas large complete sets of technology, a series of new equipment and single. With the valve on the development of new equipment is characterized by large-scale, high-parametric, high-performance automation and complete sets, complete sets of equipment and control of these adapted. Past 20 years, foreign control valve there is great development. In addition to the general manual, mechanical, electrical, pneumatic, hydraulic transmission, the electro-hydraulic connections, gas and liquid connections, automatic control valve increasing variety, and the further development of the trend.
Such as oil refining equipment. 36.4 million tons the largest oil refinery / year (in the Caribbean Virgin Islands), 3,000 tons / year (Venezuela). At present 20 million tons / year oil refinery nearly 30; the largest unit capacity refinery pressure relief devices to reach 24 million tons / year to reach 8.24 million t catalytic cracking unit / year, hydrocracking unit to 320 million tons / years. Large-scale installations, forcing the valve is also growing, began to control the direction of automation.
In recent years, rapid development of long-distance pipeline, the main one is low cost, rail transport is only equivalent to 1 / 3; the second is buried in the ground, not easy to destroy; third pipeline construction speed, low investment. Therefore, the long pipeline in recent years with demand for the valve. Maximum capacity of power generation equipment biaxial thermal power unit l30 million kW, single-axis 120 million thermal power kW, the largest nuclear power plant 1.3 million kW.
These complete sets of equipment with the largest supporting plate gate valve diameter 1620mm, 2000mm; maximum valve diameter 9750mm; maximum ball diameter 3050mm, the weight of the valve not drive to 184 tons; the largest valve for water diameter 2750mm, the pressure to 9MPa.
The economic effects of large-scale equipment, sum up, one is to increase production efficiency, and second, to reduce investment in infrastructure, third is to reduce raw materials and fuel consumption. An annual handling capacity of 500 million tons of oil refining equipment and 100 tons compared to the investment per ton of production capacity by 50%. A 600 tons / year refinery and two 300 million tons / year refinery comparison, the investment is only about 69% of the latter, 53% of steel consumption, an area of 54%, 75% of production costs, The labor productivity has increased to 170%.
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