Gas pneumatic valve and the difference between ordinary pneumatic valve < / div >

as the natural gas is more and more widely used, the dosage of the pneumatic valve gas is becoming more and more big, because gas pneumatic valves and safety is closely related, slightly improper use is easy to cause leakage, there will be unnecessary harm, so small make up to the key note, more customers will ask why natural gas is more expensive than pneumatic valve pneumatic valve gas prices so much, in order to remove your doubt, I summarized the gas at the focus of the pneumatic valve and share knowledge.

1, the data of pipeline transporting natural gas contains a large amount of hydrogen sulfide (in front of the desulfurization This is a kind of strong toxic and corrosive gas, it generate iron sulfide and iron reaction, can be a flake off, wear corrosion machinery) 。 Even after the desulfurization process, such as natural gas, there are still residual hydrogen sulfide. So the pipeline pneumatic valve selection should choose sulfur corrosion resistance materials.
2,
natural gas pipeline leakage is mostly built on the edge of the city, and does not like usually factory, often have workers to operate, maintain and check. City gas pipelines generally in hundreds of kilometers above, only regular inspections, view, and sometimes pipeline needs through complex region, medium leakage may cause severe fire accident. Especially in closer from the urban pipeline, it is particularly important to prevent pneumatic valve leakage.
gas pneumatic valve leakage request is very strict, usually buried and important pneumatic valves are used in pneumatic all-welded body structure. In order to ensure the pipeline pneumatic valve sealing performance, request seal has excellent corrosion resistance, abrasion resistance, since the embellish and elasticity. In recent years the development of polymer materials for the choice of pipe pneumatic valve sealing material supply a wide selection of heaven and earth, such as ptfe, nylon, nitrile rubber ( 丁腈橡胶) , special synthetic rubber ( VITON) And so on.

3, using occasions line once, in a few years are not allowed to stop operation, the longer run, the better, not the usual chemical plant or refinery, have overhaul period. Pipeline transport of natural gas in the face of a large number of users of all cities, with residents, businesses, factories, etc. , especially the enterprise users with natural gas as the material, are not allowed to have a moment's continuous. Tandem line of pneumatic valve in the line, once the failure consequence is unimaginable. Pneumatic valve and pipeline primary sealing parts, such as pneumatic seat parts request long life. Usually main pipe pneumatic valve life request more than 30 years.

4, drive equipment due to the pipeline transporting high pressure, large caliber, fast switching time, pipeline pneumatic valve need to adopt high torque drive equipment. Such as electric or pneumatic equipment, gas - Operating or electric - Operating equipment. Driving device have explosion-proof request, request EExdIIBT4, protection grade IP68. Because of conduction control personnel in the station or central control room, usually request pipelines in the event of the major accidents such as break, pneumatic valve can automatically block pipeline. Pipeline pneumatic valves requested action force is small, changes in temperature, external force effect, can achieve precise operation. Emergency block the pneumatic valve, in particular, must be in the fully open position for a long time, rapid closure line when necessary. At the same time, the request of the opening of the pneumatic valves open and close position and precision indicator, and easy to understand, and satisfied with the proper switching speed.