Grooved End Butterfly Valve Size(mm): DN50-300 Nominal Pressure(MPa): 1.6 API, ASTM, ANSI, DIN, JIS, BS, ISO approved Grooved End Butterfly Valve1)Working temperature: -25*C~120*C2)Applicable medium: Fresh water, sewage, sea water, air, vapor, food, medicine, oils, alkalis, salt, acids etc.3)Materials:Body : cast iron, ductile iron, stainless steel and carbon steelDisc: ALB, Monel, CF8M, WCB, ...