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Victor® EST4 Series EDGE™ High Capacity Oxygen Two Stage Regulator, CGA-540

Airgas Part #:VIC0781-5218

Manufacturer Part #:0781-5218

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Item Details

  • Victor® ETS4 EDGE™ Series Two Stage High Capacity Oxygen Regulator offers 5 - 125 psig delivery range and is used for applications where precise as well as constant outlet pressure is required. Regulator with maximum inlet pressure of 3000 psig provides reliable performance. It features forged brass body, zinc-aluminum housing caps, high impact ABS gauge guard and 2.7" fabric reinforced neoprene diaphragm. It has 1 1/2" UL listed/recognized gauges with 4000 inlet gauge range and 200 outlet gauge range. Regulator has a compact layout with built in gauges that are recessed into the body for protection. Regulator with 540 CGA-inlet connection features 9/16"-18 RH(M) outlet connection. It features advanced design which is a blend of form and functionality. Regulator with easy to read gauges having enhanced graphics has color-coded knobs to allow quick gas identification. User friendly architecture features side mounted knob that provides natural as well as safe hand/body positioning to adjust delivery pressure. It has a single impact point configured to assist in safeguarding elements critical to system integrity. Regulator with 0.488 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 and 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. Regulator measuring 6.85" X 4.72" X 4.4" has five-year warranty and meets or exceeds CGA-E-4, UL 252 and ASTM G-175 promoted ignition test.


  • Brass adjusting screw with forged T-Handle
  • Delrin insert bushing for durability, easier adjusting
  • Die forged brass spring housing cap provides greater strength and durability
  • Stem type seat mechanism
  • Stainless steel diaphragm gives accurate long lasting service
  • Stainless ball in key for easy adjustment
  • Adjusting spring pretested for quality assurance
  • Sintered inlet filter electroless nickel plated bronze
  • Precision machined nozzle for optimum flow control
  • Regulators will deliver at least the stated upper range and in some cases may exceed the stated upper range


  • Industrial and General Fabrication
  • Light Fabrication
  • Repair and Maintenance
  • Structural Steel Fabrication

Product Attributes

Regulator Type

» Two Stage Regulator

Gas Service

» Oxygen
» O2

Delivery Rate

» 5 - 125 psig

Inlet Connection

» CGA-540


» High Capacity

Outlet Connection

» 9/16" - 18 UNF (RH Male)"

Gauge Diameter

» 1 1/2"