Secondly, General urban natural gas pipelines are more than hundreds of kilometers, only regular patrols, inspections, and sometimes the pipelines requires a complex area, dielectric loss may pose serious fire accidents. Especially closer to the City line, to prevent leakage of the valve is particularly important.



Finally, once the pipeline is put into operation, is not allowed to stop running within a few years, does not allow for a moment interrupted, much less overhaul period. Pipeline valve failure on the series in the pipeline, the consequences would be unthinkable. Therefore, the wearing parts of the Top Entry Ball Valve require a long product cycle.