



Miller | Smith HD Single Stage Series 40 Oxygen Regulator (40-XX-540)
Select Size (Parts & Accessories):
Select Size (Parts & Accessories)
Lead time: 1-2 Weeks
Quantity:
The Miller Smith heavy-duty series 40 regulators offer industrial grade quality, providing accurate pressure readings for welding, cutting, heating, and other applications. These regulators come with a 3-year warranty and provide consistent gas flow due to the durable construction.
Optional Hard Hat Regulator Guards are sold separately (HB190).
Features
• Resin Bonnet Insert (series 40/46 only) - allows smooth, easy adjustment even at high-pressure levels
• Stainless Steel Diaphragm - resists corrosion, leaking and freeze-up if used with liquid gases
• Color-Coded Labels - supplies performance capabilities, easy gas service, and identification
• External Relief Valve - protects regulator from damage due to inadvertent high-pressure surge
• Nickel-Plated Bonnet - along with brass body, these protect against corrosion
• Gauges and Lenses - 2.5 inch corrosion-resistant polished brass gauges with shatter-resistant lenses
• Sure Seat Dual-Filtered Seat Assembly - protects high-pressure seat from debris for reliable operation
Quick Specs
• Max Delivery Pressure: 175 or 275 PSI
• Max Inlet Pressure: 3,000 PSI (207 Bar)
• Outlet Connection: 9/16"-18 RH
• CGA: 540
Optional Hard Hat Regulator Guards are sold separately (HB190).
Features
• Resin Bonnet Insert (series 40/46 only) - allows smooth, easy adjustment even at high-pressure levels
• Stainless Steel Diaphragm - resists corrosion, leaking and freeze-up if used with liquid gases
• Color-Coded Labels - supplies performance capabilities, easy gas service, and identification
• External Relief Valve - protects regulator from damage due to inadvertent high-pressure surge
• Nickel-Plated Bonnet - along with brass body, these protect against corrosion
• Gauges and Lenses - 2.5 inch corrosion-resistant polished brass gauges with shatter-resistant lenses
• Sure Seat Dual-Filtered Seat Assembly - protects high-pressure seat from debris for reliable operation
Quick Specs
• Max Delivery Pressure: 175 or 275 PSI
• Max Inlet Pressure: 3,000 PSI (207 Bar)
• Outlet Connection: 9/16"-18 RH
• CGA: 540
| MPN: | MIL40-175-540 |
|---|
MPN: MIL40-175-540
Brands you trust at prices you can afford!
Over the past decade, we've become the country's most trusted one-stop online welding shop. We've done it with the guaranteed lowest prices, the best customer service in the industry, and a commitment to providing the best online shopping experience for all welders.
------------------------------


From The Blog

Guide
How to Become a Welder
There are several ways to become a welder. Each option has different pros and cons depending on your specific life situation and goals.

Guide
Should You MIG or TIG Aluminum?
Welding aluminum presents unique challenges due to its heat conductivity and oxide layer. Learn the differences between MIG and TIG welding aluminum, when to use each process, and how to achieve st...

cutting
Which FlexCut Machine Is Right for You?
For those of us welders who’ve been around a while, the story of plasma cutting has been a curious tale. At first, consumer-grade plasma machines were finicky and expensive. Most welders trusted th...



Download Product Spec Sheet