221-0002 - Miller Smith Silverline 220 Series High Purity CO2 Regulator, Two Stage, 0-50 PSI

Precision Analytical Control for High Purity Gases

The Miller Smith 221-00-02 Silverline High Purity Analytical Two Stage Regulator is engineered for applications demanding the utmost stability and cleanliness in gas delivery. Designed specifically for Carbon Dioxide (CGA 320) service, this regulator belongs to the esteemed 220 Silverline Series, known for bridging the gap between industrial durability and laboratory precision. The core of its performance lies in the stainless steel diaphragm, which not only ensures precise control of outlet pressure but also maintains the integrity of the gas stream by preventing off-gassing or contamination often associated with elastomeric diaphragms.

In analytical environments such as gas chromatography—including thermal conductivity, flame ionization, and electron capture detection—consistent pressure is critical. The two-stage design of the 221-00-02 is essential here; it reduces the cylinder pressure in two steps, providing a steady delivery pressure of 0-50 PSIG regardless of fluctuations in the supply cylinder. This means as your CO2 cylinder drains from full to empty, your instrument sees no drift in flow or pressure, eliminating the need for constant manual adjustments.

Durability is not sacrificed for precision. The regulator features a rugged brass bar stock construction that is fully plated—body, bonnet, and gauges—offering superior protection against corrosion and environmental wear. The seat is filtered to trap particulates, further extending the service life of the unit and protecting downstream equipment. With large, easy-to-read 2-1/2 inch gauges and a built-in capturable preset safety relief valve, this regulator provides both the safety and the detailed feedback required by laboratory professionals.