Wafer butterfly check valve Technical: Size: 1.5"-28" /1.5"-18" Nominal Pressure: PN10/PN16 Test Pressure Sealing: PN11/PN17.6 Shell: PN15/PN24 Working Temperature: -15degC~150degC Suitable Mediums: Water Steam Oils Standard: Design Standard: API594 Face To Face: ISO5752 DIN3202 Body Flange Drilling: DIN2501 PN10/PN16 BS4504 Test Standard: API598 contact: tjvalve@tjtvt.com