Q361F PN1.6-PN2.5 all-welded ball valve is widely used in various fields, its superior quality and high-performance stability is not common cast steel ball valve, all-welded ball valve life is far greater than the cast steel Ball valves, all-welded ball valves are widely used in urban gas, urban heating, petrochemical, shipbuilding, steel, pressure regulating stations, power plants and other types of pipeline equipment.