... fire fighting equipment Nominal Dia.DN50(2'')-DN200(8'') Clamp Butterfly Valve,Butterfly,high perfomance butterfly,fire fighting equipmentFeatures ... Especially applicable to water supply ducts of hydrants and auto sprinkler systems3) Can also be used in other water ... °C 14)Applicable environment: clean water, foam liquids Clamp Butterfly Valve,Butterfly,high performance butterfly valve,fire fighting ...