1C4-3B57-1B0000M0A-16

MODEL "BQ" BACK PRESS RELIEF REGULATOR, TFE GASKETS 1/2" INLETS,1/2" OUTLET; BRONZE BODY & SPRING CHAMBER (OPT-5), CRYOGENIC CONSTRUCTION OPT-55: CLEANED FOR OXYGEN SERVICE PER SPEC #S-1134; B5 TRIM: BRASS WITH TFE SEAT,PHOS.BRONZE DIAPHRAGM; NPT SCREWED; 10-25 PSIG SST RANGE SPRING; OPT-55: CLEANED FOR OXYGEN SERVICE PER SPEC #S-1134; SPECIAL TEST & PERFORMANCE: TORQUE FLANGE BOLTS EVENLY TO 11 FT/LBS; TEST ON NITROGEN GAS IN THE CLEAN ROOM; IN ESTABLISHING THE 15 PSIG SET PRESSURE, THE VALVE MUST RELIEF AT LEAST 620 SCFH – 18 PSIG AND MUST SHUT OFF TO LESS THAN 10 BUBBLES/MINUTE BY 9 PSIG;