Gas valve is a safety device supporting a new gas pipeline project. Used to cut, turn, adjust the gas pipeline, with good control characteristics and closing the sealing performance. For a variety of city gas medium pipeline gas, liquefied petroleum gas, natural gas, oxygen and so on. Gas valve widely used, a wide range of classification methods more. The total can be divided into two categories:
The first automatic valve: the ability to rely on the gas itself and self-acting valve. Such as check valves, control valves, pressure reducing valves and so on.
The second class driver valve: With manual, electric, pneumatic valves to manipulate the action. Such as gate valves, globe valves, throttle valves, butterfly valves, ball valves, plug valves, etc.
In addition, the valve's classification as well as the following methods:
By structural features, according to the closure member to move relative to the direction of the seat can be divided into:
1. Door-shaped cross-section: off pieces move along the seat center.
2. Gate shape: off pieces move along the vertical seat center.
3. cock and ball: closure member is a plunger or ball, rotating around the center line itself.
4. Swing shape: off pieces around the outside of the seat axis.
5. dish: the closure member disc around the axis of rotation of the
Gas Top Burner Valve seat.
6. spool-shaped: the closure member in a direction perpendicular to the sliding channel.
Category according to the structure are:
Plug valves, gate valves, globe valves, ball valves - used to open or close 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.
