Victor 0781-5121 ESS3 EDGE Series Single Stage Medium Capacity Carbon Dioxide Regulator offers 5 - 125 PSIG delivery range and provides reliable, superior quality gas control technology. Regulator with maximum inlet pressure of 3000 PSIG features forged brass body, stainless steel bolts and zinc-aluminum housing cap with almost twice the yield strength of brass. Regulator featuring high impact ABS gauge guard has 4000 inlet gauge range and 200 outlet gauge range. Regulator with 320 CGA inlet connection has CGA 032 5/8"-18 UNF outlet connection. It features advanced design making them compact industrial regulator. Regulator with easy to read gauges featuring enhanced graphics has color-coded knobs to allow quick gas identification. It provides natural as well as safe hand/body positioning to adjust delivery pressure. Regulator with 0.141 Cv flow coefficient provides uniform flow performance over various range of cylinder pressures with high sensitivity and accuracy in delivery pressure. Regulator includes external self-reseating relief valve, stem type seat mechanism, nickel plated bronze sintered inlet filter. It comes with color-coded SLAM impact absorbing safety knob for added strength, safety as well as protection of the regulator internals. Long lasting regulator meets or exceeds CGA E-4, UL 252 and ASTM G-175 promoted ignition test. Innovative new EDGE Series Regulators Offer Safety and Advanced Design. Gauges are recessed into the body for the highest level of safety and protection possible. More efficient internal flow paths translate to improved flow consistency from full to empty cylinders. Same sintered inlet filter used in all Victor industrial regulators. Innovative design elements enable the regulator to meet or exceed oxygen-related safety standards CGA E-4, UL 252, and the stringent ASTM G-175 promoted ignition test. Housing cap is made from high strength zinc-aluminum alloy that has nearly twice the yield strength of forged brass. Time-tested fabric reinforced neoprene diaphragm provides superior sensitivity and control. Seat assembly and friction damper are the same ride and true components used for decades in SR 350 and SR450. Internals remain protected from weather elements through an internal vent system protected under the knob, which is channeled tp promote run-off. SLAM Knob designed with multi stage crumple zones which absorb impact energy in the even the cylinder falls over. Helps protect pressure integrity or both regulator and cylinder valve. Design/Construction. High impact ABS gauge guard 1.5" gauges - steel. 2" diaphragm - fabric reinforced neoprene.