22-80-320-6 - Miller Smith 20 Series Argon/CO2 Flowmeter Regulator CGA 320 with Hose

Precision Gas Control for Industrial Applications

The Miller Smith 20 Series Flowmeter Regulator (SKU: 22-80-320-6) is a high-performance gas control device engineered for the rigorous demands of industrial MIG and TIG welding. Designed with a focus on accuracy and durability, this unit integrates a flowmeter and regulator into a single, compact assembly. The core of its construction features a rugged aluminum housing that provides a robust shield for the flow tube, protecting it from the accidental impacts and rough handling typical of busy workshop environments. The flow tube itself is manufactured from shatter-resistant polycarbonate resin, offering superior impact resistance compared to traditional glass tubes while maintaining exceptional optical clarity.

Technically, the 20 Series distinguishes itself with Miller's proprietary Sure Seat™ filtered high-pressure seat assembly. This critical component is designed to prevent the ingress of debris and contaminants into the seating area, a primary cause of regulator creep and premature failure. By ensuring a clean seat, the regulator maintains stable pressure delivery over a significantly longer service life. Furthermore, the flowmeter utilizes a unique self-centering ball guide mechanism. In standard flowmeters, the ball indicator can float off-center if the unit is not perfectly vertical, leading to erroneous flow readings. The Miller self-centering design constrains the ball to the center of the tube, ensuring readings remain accurate within five percent of full scale, even if the cylinder or regulator is tipped. This feature is vital for maintaining strict weld procedure specifications (WPS) and minimizing gas wastage.

The unit is equipped with a CGA 320 inlet connection, specifically standardized for Carbon Dioxide (CO2) cylinders, yet the flow tube features expanded scales calibrated for both Argon and CO2, allowing for versatility in gas usage with appropriate adapters. Safety is paramount, evidenced by the inclusion of an auto-reset pressure-relief valve that vents excessive pressure in the event of a surge and automatically resets, preventing catastrophic damage to the regulator. An additional inlet stem filter provides a secondary layer of defense against system contamination. The package is completed with a 6-foot gas hose assembly, facilitating immediate connection to welding power sources.