... :2" to 10" 3.ISO and CCCF certification fire signal butterfly valve 1.Size:DN50,65,80,100,125,150,200,2502 ... :1)body:HT200 2)stem:2Cr13 3)bushing:ZCuZn38 4)butterfly plate:QT450-18,Plastic sprayed3.Media:water or foam mixture4 ... :DC24V,1A5.Suitable temperature: 4 - 70°C6.It is the best mating product for automatic sprinkler system. ZSXF-D fire signal butterfly valve