31-50-320 - Smith 30 Series CO2 Flow Gauge Regulator, 10-50 SCFH, CGA 320

Reliable CO2 Shielding Gas Control for Welding

For professional welders utilizing CO2 for MIG (GMAW) or flux-cored applications, the Smith 30 Series CO2 Flow Gauge Regulator (31-50-320) delivers the consistency and durability required for high-quality fabrication. Controlling your shielding gas flow is critical to preventing porosity and ensuring a stable arc, and this regulator is designed to take the guesswork out of flow settings. With a delivery range of 10-50 SCFH, it covers the vast majority of welding applications, from light sheet metal work to heavy structural steel fabrication.

One of the biggest frustrations in a welding shop is equipment failure due to dirt and shop debris. Smith Equipment has addressed this with their exclusive Sure-Seat™ protection. By filtering the gas before it hits the high-pressure seat, this regulator prevents the microscopic particles found in some industrial CO2 cylinders from damaging the internal sealing surfaces. This means you spend less time swapping out faulty regulators and more time welding. The gauges are large (2 inches) and easy to read even from a distance, protected by polycarbonate lenses that won't shatter if a tool is accidentally dropped on them.

The 31-50-320 connects via a standard CGA 320 fitting, specifically designed for CO2 cylinders (remember to use the required washer for a tight seal). Unlike flowmeters that use a floating ball, this flow gauge uses a pressure-calibrated dial to indicate flow, which allows for a more compact design that is less prone to breakage if the cylinder cart is bumped. The regulator also features a self-reseating relief valve for added safety, venting gas away if pressure spikes occur. Backed by a 3-year warranty and made in the USA, this Smith regulator is a solid investment for any welder looking to upgrade their gas delivery system for better performance and lower long-term costs.