According valves gas valves and pipe connections can be divided

1 Flanged valves: valve with flanges, valves and pipe with flanged connections. 2 threaded connection valve: Body with internal or external threads, threaded pipe connection using valves. 3 welded connection valve: body with hydraulic ferrule welded joints, valves and pipe with welded connections. 4 clamp connection valve: the valve body with jaws, valves and pipe with clamp connections. 5 card sets connected to the valve: A valve sleeve and the pipe connections. Use Gas valves are widely used for a variety of city gas valves pipeline network system media pipeline gas, liquefied petroleum gas, natural gas and oxygen. Drive in the form of a manual, worm gear, double hose connector electric, pneumatic, hydraulic, electro-hydraulic actuator linkage, enabling remote control and automatic operation. According to the structure of the main types are: Plug valves, gate valve, globe valve, ball valve - used to turn on or off the gas flow pipe. Check valve (including bottom valve) - used to automatically prevent backflow of gas pipeline. Throttle - for regulating the flow of gas pipelines. Valve - used to automatically reduce the gas pressure inside the equipment and piping. Department of the gas valve through the gap, resulting in the loss of resistance to pressure to achieve the purpose of decompression.