Valve classification, Shanghai Guanlong Valve Machinery Co., Ltd. is a valve by changing the internal passage inside the pipe cross-sectional area to control the flow of a medium mechanical products. 1, by purpose and function points: (1) cut-off valve class: cut-off valve, also known as closed-valve, Shanghai and Shanghai Valve Manufacturing Co., Ltd., and its role is to connect or disconnect the line of media. Z, J, X, Q, D, G, discharge valve, sampling valves, pinch valves. (2) to check class: Also known as the one-way check valve, its role is to prevent the line of medium back. H, bottom valve. (3) The shunt valve class: its role is assigned, split or mixed line of medium. S, dispensing valve. (4) control valve class: its role is to regulate the line of medium flow, pressure and other parameters. T, L, Y. (5) Safety valve categories: its role is to prevent the pressure medium means exceeds a predetermined value, so as to provide security protection for overpressure piping or equipment. Safety valve, breathing valve. How to detect the main valve is a valve performance indicators leakage, valve, water check, Guangzhou Kaiheng Valve Co., Ltd., through the observation bubble size and location of the leak, valve performance testing should refer such standards and the appropriate equipment, such as JB / T8528-97 common type valve electric device technology, GB / T13927-92 universal valve pressure test. Tianjin Tanggu Valve Co., Ltd., the Hong Kong _ _ valve valve valve provided by the Hong Kong Science and Technology Co., Ltd., Dongguan Ming. 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!