GB / T12242-2005 safety valve performance test method GB / T12245-2006 valve performance test method GB / T12251-2005 steam traps - Test method GB / T13927-2008 Universal valve pressure test JB / T5296-1991 common valve flow coefficient and Test Method for flow resistance coefficient GB / T12225-2005 General of copper alloy castings valves GB / T12226-2005 General Valve gray iron castings GB / T12227-2005 General Valve iron castings GB / T12228-2006 General valve carbon prime steel forgings GB / T12229-2005 General valve carbon steel castings factory in Jiangxi valves forged steel valves | Jiangxi valves | valve out of Hong Kong, the Hong Kong valve provided by the Dongguan Science and Technology Co., Ltd. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead valve and you work out of Hong Kong into the brilliant, for a better future!