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Radnor flow gauge regulator brass body with dual gauges and cylinder connection

Radnor

Radnor 64003037 Flow Gauge Regulator Argon CO2 Single Stage

SKU CH-CT3D-6SRT5

Single-stage flow gauge regulator for argon and carbon dioxide cylinders with a 30 scfh maximum flow rate

  • Main materialHAWA
  • Product typeWelding Supplies
  • Single-stage design simplifies gas control
  • Argon and CO₂ compatible for versatile welding
  • 30 scfh max flow suits light-duty tasks
  • 3 000 psig inlet handles high-pressure cylinders
  • Female NGO and UNF connections fit standard fittings

Gas compatibility

This Radnor flow gauge regulator handles argon and carbon dioxide for welding applications. It mounts directly to a cylinder with a single stage design that reduces inlet pressure in one step. The unit carries California Proposition 65 warnings for chemicals linked to cancer and reproductive harm.

Pressure and flow limits

Maximum inlet pressure is rated at 3,000 psig with a right hand NGO thread on a 0.965 in. -14 female inlet. Both argon and carbon dioxide deliver a maximum flow rate of 30 scfh through a 5/8 in. -18 UNF female outlet. Single stage construction means outlet pressure can vary as cylinder pressure drops.

Cylinder mounting requirements

The regulator connects to a cylinder using the specified NGO inlet thread and requires no additional manifold or adapter for the listed gases. It frees the welder from needing a separate flow meter because the gauge integrates flow indication. Buyers who need multi stage regulation or compatibility with other gas types should look elsewhere.

How it compares

Measured against everything we stock in Welding Equipment & Positioners, at today’s prices. Recalculated every night.

Price $134.99
Pricier than about 71% of the 1,978 comparable items (median $50.99).

Specifications

Product
Brand nameRADNOR
Product typeWelding Supplies
Size & build
Main materialHAWA

Questions about this item

How do I fit the 0.965-14 NGO inlet to my gas cylinder?

Thread the female NGO nut onto the cylinder valve by hand, then tighten with a wrench on the flats; do not overtighten the right-hand threads or the seat can distort.

Which part will need replacement after extended use?

The internal seat and diaphragm assembly should be inspected annually and replaced if leakage or erratic flow appears.

At what inlet pressure does the single-stage design stop holding a steady 30 scfh?

As cylinder pressure falls the outlet flow will rise above the 30 scfh setting because a single-stage regulator cannot compensate for the decaying inlet pressure.

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