UL Listed Emergency Pressure Relief Vent (365)

Heavy duty cast iron top and aluminum base.-cast iron top and base available. Machined top and base with a Buna-N “O” Ring provide a vapor  resistant seal.  Air flow at 2.5psi is 43,770 SCFH with screen. The screen minimizes the chances of vandalism and theft. 3″ NPT male threads are standard.