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Lujiang Prison is a prison in Chaohu City, Anhui, China established in 1957 with an area of 987mu. It is a high security prison for serious offenders currently employing over 1,600. The prison is one of the largest national valve manufactures with a 40-year-old state enterprise that produces standard valves such as: GB code, English BS, American ANSI, API, AWWA, MSS, German DIN 4.0, "Bai Hu" brand gate valve, cut-off, check, ball, valve, water special purpose valves as well as micro anti-slow products and filters. There are a total of 100 models, 1000 specifications and valves sizes of 15-1600mm produced here. Past projects have included the Chairman Mao Memorial Hall and Qinshan Nuclear Power Plant. In 1997 it received (DNV)ISO9002 quality system authentication via Norwegian Classification Society. In 1998 it had large shares of stock in Shanghai East China Valve Ltd. "Baihu" was given famous provincial brand and trademark title, and a top-notch brand award in valve profession. Also labeled a high-quality product and exempt from inspection. In 1998 the prison received Anhui Province prize for quality control. Lujiang Changtai Machine Works was approved by the State Economic and Trade Commission to manage valve factory's imports and exports. Products are exported to other countries including Britain and the US. Several valves are best-selling in over 60 countries and regions, including the US, Japan, Britain, France, and Germany.[1]

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