After the turbine, double flanged valve flanged valve closed Note shutting the door, because the media or the ambient temperature changes, pressure, thermal expansion causes gate and the seat valve member becomes large. This force is reflected to the valve stem threads Kaiheng Valve Co., Ltd. in Guangzhou, it is difficult to open the valve again, the torque required to open the valve (that is applied to the stem nut torque) than the general shut-off valve When the desired torque is far greater. Classification Shanghai Guanlong Valve Valve Machinery Co., Ltd. is a valve to control the flow within the pipeline medium by changing its internal channel cross-sectional area of ??a mechanical product. 1, by purpose and function points: (1) cut-off valve class: shut-off valve, also known as closed-valve Manufacturing Co., Ltd. Shanghai and Shanghai Valve, 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. Ningbo Ai Ke Valve Co., Ltd., Shenzhen valve, the valve out of Hong Kong, the Hong Kong valve provided by the Dongguan Science and Technology Co., Ltd. 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!