Skip to Main Content
Canadian
Canadian owned and operated

123-0002 - Miller Smith Silverline 2-Stage CO2 Regulator 0-250 PSI

Packaging: 1 per ea
$777.47/ea $510.96/1 per ea only $510.96/eaSave 34%

Usually ships within 3-5 business days

OVERVIEW

Reliable CO2 Delivery for Professional Shops

When you are running a busy shop, the last thing you want to worry about is your gas pressure fluctuating in the middle of a job. The Miller Smith 123-00-02 Silverline Series Two Stage Regulator is built to solve that problem. Designed specifically for CO2 cylinders (CGA 320), this regulator is a workhorse for welders and fabricators who need consistent performance. Whether you are setting up a distribution line or running pneumatic tools that require steady pressure, this Smith regulator delivers reliable results from a full tank down to an empty one.

Why Choose Two-Stage?

If you have ever had to constantly tweak your regulator knob as your tank gets low, you know the frustration of single-stage regulators. This Silverline model uses a two-stage mechanism that automatically compensates for dropping cylinder pressure. You set it once, and it holds that pressure steady until the tank is dry. This is ideal for long-duration tasks where consistency is key. With a delivery range of up to 250 PSI, it provides ample power for a wide variety of shop applications beyond just shielding gas.

Built Tough for the Job Site

Miller Smith equipment is legendary for its durability, and this regulator is no exception. It is machined from solid brass bar stock—not cheap die-cast metal—so it can take a beating. The gauges are large (2-1/2 inches) and easy to read from a distance, so you can check your levels at a glance. Inside, the Sure-Seat technology filters out dirt and debris before it can damage the internal components, meaning you spend less money on repairs and replacements. It also features a 1/4" FNPT outlet, making it easy to adapt to whatever hose or piping system you are running.

Additional Information
Brand:Smith Equipment
CGA Fitting:CGA 320
Item:Regulator
Max Inlet:3500 PSI
Max Outlet:250 PSI
Used On Which Gas:CO2
Series:Silverline 120
Stages:Two Stage
Diaphragm Size:1-7/8 Inch
Body Material:Brass Bar Stock
Gauge Size:2-1/2 Inch
Outlet Connection:1/4" FNPT
Packaging Description:1 per ea

INCLUDED

  • 123-00-02 Two-Stage Regulator
  • Owner's Manual

APPLICATIONS

  • Laboratory gas control
  • General plant maintenance
  • Pneumatic tool operation
  • Component testing
  • Gas blanketing
  • Industrial CO2 distribution

FAQ

A two-stage regulator reduces cylinder pressure in two steps, providing a constant delivery pressure even as the cylinder pressure drops. A single-stage regulator's delivery pressure may rise as the cylinder empties, requiring manual adjustment.

The CGA 320 connection is the standard fitting for Carbon Dioxide (CO2) cylinders in the United States. It typically requires a washer to seal the connection.

While the internal materials are compatible with inert gases, the CGA 320 inlet fitting is specific to CO2. To use it with Argon (CGA 580) or Nitrogen (CGA 580), you would need to change the inlet stem and nut, which should only be done by a certified technician.

The maximum inlet pressure rating is 3500 PSI, which safely covers standard high-pressure cylinders.

Yes, it includes a preset safety relief valve that vents to the atmosphere. This is a safety feature designed to prevent over-pressurization of the downstream equipment.

The regulator features a 1/4" FNPT (Female National Pipe Thread) outlet connection, allowing for versatile plumbing options.

Sure-Seat is a Miller Smith feature that includes a filtered seat to prevent debris from entering the high-pressure seating area, ensuring better gas purity and longer regulator life.

No, this regulator is designed for inert and non-corrosive gases only. Using it with corrosive gases can damage the brass internals and cause failure.