Swing check valve grooved end Nominal Pressure:300psi Grooved standard:ANSI/AWWA C606 Approval:UL/FM Flange standard: ASME/ANSI B16.1 Class 125 or ASME/ANSI B16.42 Class150 or BS EN1092-2 PN16 Maximum working pressure:350psi maximum pressure :700psi conform to UL312 & FM 1210 Maximum working temperature:80°/176℉ Coating: Epoxy coated interior and exterior by electrostatic spray or coating upon request. More details , please contact kuntai sales.