1 \ operation of the valve should be intact valves, flanges, and bracket bolts complete thread lossless, no loosening. 2. The hand wheel is lost, should be installed for the Taiwan Toyama Valve 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 Guanlong valve Machinery 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 Guangzhou Kaiheng Valve Co., avoid beating them, or support heavy loads. Other claim 1, the valve assembly is completed with a nitrogen purge at least one minute. 2, air tightness test must be with pure nitrogen. 3, airtightness test after passing the encapsulation, sealing polyethylene cap with a clean, apply a polyethylene cap before using an organic solvent soaked wipe clean. 4, and then vacuum sealed. 5, the final packing. 6. During transport to take measures to ensure that the encapsulation is not damaged. Tianjin Tanggu Watts Valve Co., Ltd., the Hong Kong valves (online consultation), the valve provided by the Dongguan Science and Technology Co., Ltd., the Hong Kong valve. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Ming Kong valve leadership with the staff warmly welcome all inquiries negotiations to create a better valve out of Hong Kong in the future.