520-001K-420

5200 SERIES PILOT OPERATED PRESSURE/VACUUM VENT W/ PIPE AWAY ASME 150 FLANGE CONNECTION; 3" INLET SIZE; 3" OUTLET SIZE; 316 SST BODY, 316 SST BOLT-IN SEAT RING; FEP-TFE ACTUATOR DIAPHRAGM, FFKM 1 PILOT SEAT, FEP PALLET DIAPHRAGMS; 18.1" - 36.0" WC PRESSURE SPRING RANGE; WEIGHT LOADED; LESS THAN OR EQUAL TO 0.49 OZ/IN2 VACUUM SET POINT; WEIGHT MATERIAL ALL SST; STANDARD: INTERNAL SENSING, SST PILOT - EXHAUST TO MAIN VALVE OUTLET, WITH BACKFLOW PREVENTER; WITH BUG SCREEN; OPT-40: CONSTRUCTION PER NACE STANDARD MR0175;