Butterfly Valve: 1)Material: SS304/SS316L 2)Size:DN25-200 or 1"-8" 3)Standards:DIN/SMS/ISO.. 4)ISO9001:2008 Butterfly Valve(Signal Butterfly Valve)Feature:1) varieties: turbine signal butterfly valve, throw butterfly valve2) especially applicable yo water supply ducts of hydrants and auto sprinkler systems3) can also be used in other water supply, petroleum and hydropower ducts for regulation or ...