MODEL "3381" CRYOGENIC PRESSURE REDUCING REGULATOR,TFE GASKETS 1/4" SIZE; SPECIAL BODY & SPRING CHAMBER MATERIAL; B5 TRIM: BRASS WITH TFE SEAT,PHOS.BRONZE DIAPHRAGM; NPT SCREWED; 20-80 PSIG SST RANGE SPRING; PER SPQ NUMBER 50190 BRZ BODY & SP CH;-85 OPTION (OULET GAUGE TAP);TAPPED SP CH W/O DRAIN HOLE; 1/8" NPT PORT IN SPRING CHAMBER IS ALIGNED WITH INLET PORT IN BODY; -5 OPTION: CLEANED FOR O2 SERVICE PER #S-1134; MAX LOADING PRESSURE 600 PSIG (41 BARG); SLIGHT LEAKAGE AT ADJUSTING SCREW MAY OCCUR;