MODEL ULR-1 PRESSURE REDUCING REGULATOR WITH UNLOADER BODY SIZE 1",; BRONZE BODY & LOADING CHAMBER; MONEL TRIM, PA SEAT, FK DIAPHRAGM FK STATIC SEAL, SST/TFE U-CUP DYNAMIC SEAL; NPT END CONNECTIONS; LOWER SPRING 2-5 PSIG RANGE; INTERNAL SENSING, STANDARD - FLOW TO OPEN DIRECTION; WITH UNLOADER, 1/4" SIZE NPT, BRONZE BODY & SPRING CHAMBER, S2 TRIM, SST METAL SEAT AND DIAPHRAGM, SPRING RANGE 40 - 90 PSIG; BRASS FILTER, COPPER TUBING, BRASS FITTING; OPT-55: CLEANED FOR OXYGEN SERVICE PER SPEC #S-1134;