8900 Series Rev B Manway Emergency Relief Vents; Mates With ASME 150 Flat Face Flange; 24" Size; 316 Stainless Steel Base; FEP Diaphragm; Model 8930 Non-Locking Hinged Pressure Relief Manway; Stainless Steel Weight Material; Per SPQ 524: Special Construction To Accommodate 270 mBar Pressure Setting