Description The Morrison Brothers-346DI-1100 AV External Emergency Valve is designed for installation at the outlet of an AST or in a liquid transfer line where product flow must be stopped in the event of a fire. Key Features Fully open design provides full flow when the valve is in the open position Cold, non-shock pressure rated at 200 PSI W.O.G. Flanged model conforms to ANSI B16.42 specification for class 150# raised face flanges 165° UL Listed fuisble link standard (212° available)