1 \ operation of the valve should be intact Guangzhou Kaiheng Valve Co., flange bolts and bracket complete thread lossless, no loosening. 2. The hand wheel is lost, should be installed for Shanghai Guanlong valve Machinery Co., Ltd., and not be able to replace with wrench. 3, packing gland is not allowed skew or no pretension clearance. 4. If the valve using the environment is more severe, vulnerable to rain, snow, dust, sand and dirt contamination Shanghai and Shanghai Valve Manufacturing Co., Ltd., 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. Butterfly valve type code type valve diaphragm valve (foot valve) shut-off valve throttle plunger valve sewage valve ball cock valve gate trap code ADGHJLPQSUXYZ Taiwan Toyama Valve Co. | valves | valve out of Hong Kong by the Dongguan Valve Co., Ltd., the Hong Kong offer. 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!