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Heavy-Duty Series 40 Oxygen Regulator

Heavy-Duty Series 40 Oxygen Regulator

Heavy-duty for an extended performance life in welding, cutting, heating, and other applications.

List Price: $288.70
Online Price: $155.90
Status: In stock. Usually ships from our warehouses in 1-2 business days.

Item: 40-175-540

Free shipping for in store pickup Learn More
Only Available in the Lower 48 States
  • Resin Bonnet Insert
    Allows for smooth, easy adjustment even at high-pressure levels.
    Stainless Steel Diaphragm
    Large stainless steel diaphragm provides for precise control of pressure. Resists corrosion, leaking and freeze-up leading to extending service life.
    Color-Coded Labels
    Identifies supply performance capabilities, easy gas service identification and technical information.
    External Relief Valve
    Protects regulator from damage do to inadvertent high-pressure surge. Relief valve will release excessive pressure and automatically reset.
    Nickel-Plated Bonnet
    The nickel-plated bonnet, along with brass body, protects against corrosion.
    Shatter-Resistant Gauge Lenses
    2.5 inch corrosion-resistant polished brass gauges with shatter-resistant polycarbonate lenses.
    Dual Filters Includes Smith’s Sure Seat™ Technology
    Dual Filters Includes Smith's Sure Seat Technology All Series 40™ Single stage regulators contain our exclusive Sure-Seat™ technology for extended seat and regulator life. Filtered seat prevents contamination from entering the seating area, reducing repair costs and down-time.
    True Blue Warranty
    True Blue Warranty All 40 Series™ regulators are covered by the Miller True Blue® 3 YR. warranty.
  • Product Literature Regulator Product Guide
    Series 40 Flow Curves
    Technical Data - Welding Hose
    How To Use Flow Curve Data
    Processes Oxy-Fuel Cutting, Welding & Heating  
    General Specifications Net Weight 7.05 lb (3.20 kg) – 8.86 lb (4.02 kg)
    Gas Oxygen, Acetylene, LP Gas (Propane, Propylene or Natural Gas), Nitrogen
    Regulator Cylinder Connection (CGA) CGA540, CGA300, CGA510, CGA580
    Connections 9/16"-15 RH or LH "B"
    Applications Construction  
    Farm and Ranch  
    Field Maintenance and Repair  
    In-Plant Maintenance and Repair  
    Mechanical Contracting  
    Metal Art/Sculpture  
    Motorsports (car, truck, bike, etc.)  
    Pipe Fabrication  
    Welding Projects  
    Process Piping  
    HVAC and Water Pipe  
    Warranty With the best coverage in the industry, Miller's True Blue® Warranty delivers unparalleled peace-of-mind.


  • Rated 3 out of 5 by 1reviewer.
    Rated 3 out of 5 by Poor communication I purchased this product online on a Sunday afternoon. after 3 days I had received no communication about my order. I did not know if it went through was rejected or whatever, absolutely no after the online purchase communication. I finally called and they said it was a good order and would ship shortly. The product was exactly what I expected but expected a lot better customer service buying factory direct and paid a premium purchase price for that option without the better service April 1, 2013
    • 2015-08-28T05:58:40.037-05:00
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