Check valve pressure test method Test status: Lift check valve axis in the horizontal position and vertical; swing check valve and valve channel axis approximately parallel to the axis in the horizontal position. Strength test, valves, test medium is introduced from the inlet end to a predetermined value, and the other end closed, Suzhou Watts Valve Co., Ltd., to see the body and bonnet no leakage in compliance. Tightness test test medium is introduced from the outlet end, check the sealing surface at the inlet end, packing and gaskets at no leakage in compliance. Rod welding-rod welded ball valve characteristic of many industries in the country are terrific, Guangzhou Kaiheng Valve Co., Ltd., because of its superior quality and performance of stability, the user's attention even more traditional steel Ball, Ball welding rod now widely used in city gas, urban heating, petrochemicals, shipbuilding, steel and other industries. Next, we will detail welding rod valve characteristics. 1, the overall body structure welding, there will be no external leakage. 2, the valve seat by a PTFE sealing ring and springs changes in pressure and temperature adaptability within the operating range without any leakage. Shanghai Guanlong Valve Machinery 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.