Guangzhou Kaiheng reliable stem seal Valve Co., Ltd., since the rotational movement of the stem only for imitation without making movement at Guangzhou valve stem packing seal is not easy to destroy, and the sealing ability increased as the pressure medium increases. Download type stem and stem head convex order to prevent the exhaust valve stem, stem seal damage such as fire, may be formed between the convex order and the body metal contact Shanghai Guanlong valve Machinery Co., ensure stem seal. Valve pressure test regulations 1, should be visually inspected after all valves of the box, including full body nameplate Taiwan Toyama Valve Co., Ltd., product quality documents, the valve is closed, can not be other injuries blue surfaces, no Dirty, ends with protective cover. 2, the operating personnel should be familiar with the pressure test station operation. 3, the valve pressure test JHA improve operator safety hazards valve pressure test, luck, etc. should be familiar with the process and have the appropriate preventive measures. 4, valve pressure test procedures: valve shell strength test, seal test, sealing test. Tianjin Tanggu Valve Co., Ltd., the Hong Kong _ valve (Online) _ valve provided by the Dongguan, Guangzhou, the Hong Kong Science and Technology Co., Ltd. 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.