Inspection and testing JB JB / T6904-1993 cylinder valves / T7748-1995 valve cleanliness and measurement methods JB / T7927-1999 valve castings appearance quality requirements JB / T9092-1999 inspection and testing of the valve testing and inspection criteria: GB / T13927-2008 1 \ Run the valve should be intact valves, flanges, and bracket bolts complete thread lossless Shanghai and Shanghai Valve Manufacturing Co., Ltd., no loosening. 2. The hand wheel is lost, should be filled and not be able to replace with a wrench. 3, packing gland is not allowed skew or no pretension clearance. 4. If the valve using the environment is more severe in Guangzhou Kaiheng Valve Co., vulnerable snow, dust, sand and dirt contamination Shanghai Guanlong valve Machinery Co., you should install a protective cover for the valve stem. 5, the scale on the valve should remain complete, accurate, clear, valve seals, caps. 6, insulation jacket should be no dents, cracks. 13, the operation of the valve, to avoid its beat, or support heavy loads. Tianjin Tanggu Watts Valve Co., 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!