According to the structure of the gas valve 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 hydraulic hose manufacturers 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 Reduction valve the purpose of decompression. By end-use, the valve can be divided according to the different uses: 1 breaking with: to connect or disconnect the gas pipeline, such as the cut-off valve, gate valve, ball valve, butterfly valve. 2 ended reuse: to prevent the backflow of gases, such as check valves. 3 adjustment: adjust the gas pressure and flow, such as valves, valve. 4 assignment: to change the flow of the gas, gas distribution, such as the three-way cock, dispensing valve, spool valve. Press the drive mode, depending on the driving mode can be divided into: 1 Manual: With hand wheels, handles, levers or sprockets, etc., there are human-driven, large transmission torque when fitted with reduction gear worm gear. 2 Electric: With motor or other electrical device driver. 3 air; driven by compressed air.