Grooved-end Butterfly Valve 1).good quality,competitive price 2).various medium, DN50-300PN1.6 3).long service life 4).OEM Characteristics:Butterfly valves are applied on the system pipelines in petroleum, chemical, food, medicine, paper, hydropower, water supply & discharge, metallurgy, energy etc. industries. They are used as regulating and cutting off devices on the pipelines and vessels of ...