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Jingzhou turns out China's largest valve with diameter of 6.35+ Meters
Updated: 2022-12-08 12:52:50

Through one year of efforts, the DN6350 ultra-large water turbine inlet butterfly valve, manufactured by Hubei Hongcheng General Machinery Co., Ltd., was accepted on December 6. The valve, more than 450 tons in weight and 6.35 meters in diameter, is the largest DN6000 water turbine inlet butterfly valve and butterfly valve in China.

The valve, about three stories high, was placed in the company's independent ultra-large valve test center. The offline acceptance team, made up of Dongfang Electric Corporation and Bureau Veritas, was testing its technical indicators and parameters such as service seal pressure. Via video link, they studied numerical indicators with the online acceptance team of Tanzania Electric Supply Company Limited. Luo Xiaonan, a resident inspector of Bureau Veritas, said the inspection party had conducted a comprehensive test of the working seal and other technologies of the valve, and it had passed the assembly test in a once-off way with superior quality indicators. Soon afterwards, the valve will be shipped to Julius Nyerere Hydropower Station in Tanzania to keep its water turbines running soundly.

Julius Nyerere Hydropower Project is an equivalent of China's "Three Gorges Project" in Tanzania. In 2021, Tanzania purchased 9 vertical Francis water turbine generators with a total installed capacity of 2,115MW from China. Hongcheng General Machinery won a bid for 5 ultra-large water turbine inlet butterfly valves at one time for its tremendous technical strength. For smooth production and assembly of the products, the company invested 30 million yuan to renovate production equipment such as annealing furnaces and sand blasting rooms, purchase large lifting equipment, introduce welding robots and other intelligent manufacturing machines, and overcome the technical problems of the welding, processing and general assembly of large butterfly valves. With the production and processing of another 4 butterfly valves under way, all the products are expected to be delivered next year.

Founded in 1956, Hongcheng General Machinery is a national high-tech enterprise, as well as a national key specialized, refined, distinctive and innovative "little giant" enterprise. The company upholds the strategy of manufacturing large, high-end, distinctive and innovative products, has independent core technologies for the design and manufacture of ultra-large high-end valves, can manufacture 8m butterfly valves and 3.5m ball valves in large volume, and has become China's largest manufacturing base of large and heavy valves. This year, the company has got orders worth 500 million yuan, including foreign trade orders worth about 20 million U.S. dollars. Next year, the company will invest 100 million yuan in technical renovation, take orders for 7.5m ultra-large valves, and conduct intensive technological research, to meet future needs for ball valves and other green auxiliary products for pumped storage units, thus becoming a world leading valve manufacturer and build a pillar of the country.


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