220-4102 - Miller Smith Silverline 220 Series High Purity CO2 Regulator, 2-Stage, 0-15 PSI

Technical Overview of the Miller Smith 220-41-02

The Miller Smith 220-41-02 is a premium component within the Silverline 220 Series, engineered specifically for high-purity analytical applications. This two-stage regulator is designed to provide a consistent delivery pressure of 0-15 PSI from cylinders with inlet pressures up to 3500 PSI. The unit utilizes a CGA 320 connection, making it the standard interface for Carbon Dioxide (CO2) cylinders used in laboratory and industrial settings. The core of its precision lies in the stainless steel diaphragm, which offers superior sensitivity compared to elastomeric alternatives and eliminates the risk of elastomeric outgassing, preserving the integrity of high-purity gas streams.

Construction-wise, the regulator features a rugged brass bar stock body that has been fully plated, along with the bonnet and gauges, to resist corrosion and maintain a clean aesthetic suitable for laboratory environments. The internal architecture includes a filtered seat that prevents particulate contamination from entering the seating area, thereby extending the service life of the regulator and ensuring reliable shut-off. A built-in capturable preset safety relief valve is integrated into the design to protect downstream equipment from over-pressurization events. Furthermore, the assembly is engineered to withstand vacuums, making it compatible with purging operations often required in analytical setups.

The two-stage mechanism is critical for applications requiring unwavering pressure stability. By reducing the pressure in two steps, the regulator compensates for the 'decay' effect seen in single-stage regulators, where outlet pressure rises as cylinder pressure falls. This makes the 220-41-02 ideal for long-duration runs in gas chromatography where pressure drift could invalidate results.