89PDSBG100S0-56740

8900 SERIES MANWAY EMERGENCY RELIEF VENTS FLAT FACE FLANGE - BOLTING PATTERN TO API 650# SPECIFICATION; 20" SIZE; 316 SST BASE; FEP DIAPHRAGM; MODEL 8930 HINGED - LOCKING DESIGN, WEIGHT LOADED FOR PRESSURE ONLY RELIEF, WITHOUT WEIGHTED ARM; WEIGHT MATERIAL ALL SST; PER SPQ NUMBER 56740 SPECIAL FULL PIECE DIAPHRAGM WITH SST RETAINER PLATE, WEATHER EDGE, LOCK OPEN HINGE, HANDLE, COTTER PINNED PALLET SPINDLE, LOCKING CAP SCREWS, ALL NON-PLATED STEEL PARTS TO BE WHITE