4200 SERIES SPRING LOADED PRESSURE/VACUUM VENT W/ PIPE AWAY ASME 150 FLANGE CONNECTION; 6" INLET AND 6" OUTLET; CARBON STEEL BODY, 316 SST BOLT-IN SEAT RING; FEP-TFE PALLET DIAPHRAGM; SPRING LOADED; >1.25 PSIG PRESSURE SET POINT; WEIGHT LOADED; 2.00 AND ABOVE OZ/IN2 VACUUM SET POINT; STANDARD WEIGHT MATERIAL STEEL OR COMBINATION OF STEEL AND SST; WITH BUG SCREEN;