Gas Valve Has Good Control Characteristics And Close Sealing Performance

Gas valve is a new type of safety supporting device for gas pipeline engineering. It is used to cut off, connect, and adjust the gas in the pipeline, with good control characteristics and close sealing performance. It is suitable for pipelines of various gas media such as city gas, liquefied petroleum gas, natural gas, and oxygen.

Gas valves are widely used in urban gas supply network system gas, liquefied petroleum gas, natural gas, oxygen and other gas medium pipelines. The drive forms include manual, worm gear drive, electric, pneumatic, hydraulic, electro-hydraulic linkage and other actuators, which can realize remote control and automatic operation.

According to the structural characteristics, it can be divided according to the direction of movement of the closing part relative to the valve seat:

1. Gate shape: The closing member moves along the center of the valve seat.

2. Gate shape: The closing piece moves along the center of the vertical seat.

3. Plug and Ball: The closure is a plunger or ball that rotates around its own centerline.

4. Swing: The closure member rotates around an axis outside the seat.

5. Disc: The disc of the closure that rotates around an axis in the seat.

6. Spool type: The closing member slides in the direction perpendicular to the channel.

According to the type of structure, there are mainly:

Plug valves, gate valves, globe valves, ball valves—used to open or close the flow of gas in pipes. Check valve (including foot valve) – used to automatically prevent the backflow of gas in the pipeline.

Throttle valve – used to regulate the flow of gas in the pipeline.

Pressure reducing valve – used to automatically reduce the gas pressure in pipelines and equipment. When the gas passes through the gap of the valve disc, resistance is generated and pressure loss is caused to achieve the purpose of decompression.