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WARNING: This product can expose you to chemicals including Nitrogen Dioxide, which is known to the State of California to cause cancer, and Carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Harris® Model 450-200-540 Heavy Duty Oxygen Single Stage Regulator, CGA-540

Airgas Part #:HCL3002499

Harris Calorific

Manufacturer #:3002499


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$187.42 /Each
Package Size: 1 Each
$187.42 Each
$187.42 Each

Typically in Stock

Item Details

  • Harris® Model 450-200-540 is an economically priced industrial-duty regulator, but with premium features found only in high priced regulators. The 450 has a stainless steel diaphragm and a Harris exclusive tamper-proof self-seating safety relief device.


  • High end features for an economical price
  • Stainless steel diaphragm
  • Internal tamper-proof self-reseating safety relief valve
  • Brass body and bonnet
  • Brass T-screw bar style knob
  • 2.5" brass dual scale gauges
  • Pressure Regulation of 0.3 PSIG
  • Max. inlet PSIG is 500
  • Delivery Pressure Gauge 30RZ PSIG
  • Supply Pressure Gauge is 400 PSIG
  • One-piece encapsulated seat design with internal filter and PTFE Teflon® seat
  • Made in the USA
  • UL® listed and CGA-E-4 certified


  • Conforms to CGA-E-4
  • UL® listed


  • Tamper-proof, self-reseating internal HP safety valve included

Product Attributes

Regulator Type

» Single Stage Regulator

Gas Service

» Oxygen
» O2

Delivery Rate

» 0 - 200 psig
» 400 psig

Inlet Connection

» CGA-540


» Heavy Duty

Outlet Connection

» 9/16" - 18 RH (Male)

Gauge Diameter

» 2.5"