221-0106 - Miller Smith Silverline 220 Series High Purity Two-Stage Regulator, CGA 350, 0-50 PSI

Miller Smith Silverline: The Standard for High Purity Regulation

Welders Supply is proud to offer the Miller Smith 221-01-06 Silverline High Purity Analytical Two Stage Regulator. While Miller is a household name in welding, their Smith gas equipment line sets the industry standard for specialty gas regulation. This specific model is tailored for applications requiring absolute precision and cleanliness, such as laboratory analysis, laser mixtures, and emission monitoring. If your operation handles CGA 350 gases like Hydrogen, Methane, or Carbon Monoxide, this regulator provides the safety and control you need.

Two-Stage Performance

For industrial and laboratory users who cannot afford downtime or inconsistent flow, a two-stage regulator is the professional choice. Unlike single-stage models that require frequent adjustment as the tank pressure drops, the Miller Smith 221-01-06 maintains a set delivery pressure of 0-50 PSI automatically. This allows operators to focus on their work rather than monitoring gauges. The regulator handles inlet pressures up to 3500 PSI, stepping it down smoothly to your required working pressure.

Premium Build Quality

Durability meets precision in the Silverline series. The body is constructed from solid brass bar stock, ensuring it can withstand the rigors of daily use. To maintain the aesthetic and functional integrity of the tool, the exterior—including the body, bonnet, and gauge cases—is fully plated. This protection guards against tarnish and corrosion. The heart of the regulator, the diaphragm, is made from high-grade stainless steel. This metal-to-metal seal type construction is superior to rubber diaphragms for high-purity applications, as it prevents the absorption of gases and ensures an immediate, crisp response to pressure changes.

Safety and Compatibility

Safety is built into every aspect of the 221-01-06. It features a built-in capturable preset safety relief valve that protects the regulator and downstream equipment from over-pressurization. The unit comes equipped with a CGA 350 inlet connection and a 1/4" FNPT outlet, making it compatible with standard high-purity fittings. Whether you are setting up a test bench, a chromatography unit, or a specialized welding mix station, this Miller Smith regulator delivers the reliability and accuracy that professionals trust.