Product characteristic and application
The butterfly valve is a kind of dual-purpose product which integrates expansion piece and flange butterfly valve.It is fiexible axially within a certain range,which is helpful for the pipeline to expand when hot and shrink when cold,remove the pipeline vibrancy and overcome the defiection caused by the disalignment of pipeline connection within a certain angle range,which is extremely easy for installation and disassembly of the valve pipeline and thus improves the economic performance.It is applicable for food,beverage,pharmacy,purification pipeline and industrial enxironmental protection,water treatment,highrise,water supply and drainage pipeline for on/off or medium flow.
1.Design manafacfure according to GB/T12237-89
2.Face to face according to GB/T12221-2005
3.End flange dimension according to GB9113-2000
4.Valve inspection and test according to GB/T13927-92