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Miller® Heavy Duty Oxygen Single Stage Regulator, CGA-580

Airgas Part #:MIL40-175-540S

Manufacturer Part #:40-175-540S

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Item Details

  • Miller® Smith® Series 40™ Heavy-Duty Single-Stage regulator regulators are extremely durable and contain our exclusive Sure Seat™ filtered seat technology for extended seat and regulator life in the most demanding industrial applications. They feature a stainless steel diaphragm which allows for use with liquid gases, all brass construction which will stand up to corrosive atmospheres and 2.5-inch (64 mm) brass case gauges.


  • External Relief Valve - Protects regulator from damage due to inadvertent high pressure surge
  • Color Coded Labels - Supply performance capabilities and easy gas service identification
  • Stainless Steel Diaphragm - Resists damage and freeze-up if used with liquid gases for extended service life
  • Die-Cast "T" Bar Adjusting Screw - Provides comfort and durability
  • Delrin™ Bonnet Insert - Allows smooth, easy adjustment even at high pressure levels
  • Nickel Plated Bonnet - Along with brass body protect against corrosion
  • Dual Filters Including Sure Seat™ - Protects high pressure seat from debris for reliable operation and long service life
  • Shatter Resistant Gauge Lenses - 2-1/2" Brass gauges with Polycarbonate lenses resist damage and corrosion

Product Attributes

Regulator Type

» Single Stage Regulator

Gas Service

» Oxygen

Delivery Rate

» 175 psig

Inlet Connection

» CGA-580


» Heavy Duty

Outlet Connection

» 9/16" - 18 LH

Gauge Diameter

» 2"