890DABHY01L0000000

8900 Series Rev B Manway Emergency Relief Vents; Mates With ASME 150 Flat Face Flange; 20" Size; Aluminum Base With Vacuum Flame Screen; Fluorocarbon Elastomer (FKM) Diaphragm; Model 8940 Non-Locking Hinged Pressure And Vacuum Relief Manway; 0.2 - 1 Oz/In2 Vacuum Spring Range; Epoxy Coated Carbon Steel Weight Material