3100 SERIES PRESSURE/VACUUM VENT VTA 8" INLET SIZE, MATES WITH STANDARD ASME 150# FLANGED CONNECTION; RAISED FACE CARBON STEEL BODY, SST TRIM, CARBON STEEL WEATHERHOOD; FEP-TFE PALLET DIAPHRAGM; STANDARD WEIGHT MATERIAL STEEL OR COMBINATION OF STEEL AND SST; STEAM JACKET;