Dual Disc Wafer Butterfly Check Valve DN40-1200mm PN(MPa): 1.0/1.6 MOQ:1pc/10-20days API,ANSI,ASTM,BS,DIN,JIS ... check valveFeatures:1)Working temperature: -25*C~120*C2)Applicable medium: Fresh water, sewage, sea water, air, vapor, oils, gas etc.3 ... , EN593 Flange End: DIN, ANSI, BS, ISO, JIS.Top Flange: ISO5211Face to Face: API609, ISO5752 series 20, BS5155Test&Check: API598 double disc check valve