3100 SERIES PRESSURE/VACUUM VENT VTA 8" INLET SIZE, MATES WITH STANDARD ASME 150# FLANGED CONNECTION; RAISED FACE SST BODY, SST TRIM, SST WEATHERHOOD; FEP-TFE PALLET DIAPHRAGM; WEIGHT MATERIAL ALL SST; PER SPQ NUMBER 57339 WITH SPECIAL OXYGEN CLEANING PER CASHCO SPECIFICATION S-1134;