221-0003 - Smith Silverline 220 Series High Purity Regulator CGA 326

Precision Control for Analytical Applications

The Miller Smith 221-00-03 Silverline High Purity Analytical Two Stage Regulator is engineered specifically for the rigorous demands of laboratory and analytical environments. When working with sensitive instrumentation such as gas chromatographs, thermal conductivity detectors, or flame ionization detectors, the stability and purity of your carrier gas are paramount. This regulator addresses these needs with a design that prioritizes contamination control and pressure stability.

At the heart of the 221-00-03 is a stainless steel diaphragm. Unlike elastomeric diaphragms that can off-gas or absorb impurities, stainless steel provides a non-reactive barrier that preserves the integrity of high-purity gases. This feature is critical for maintaining a clean baseline in analytical readouts. Furthermore, the regulator features a filtered seat, which not only adds another layer of protection for the gas stream but also extends the service life of the regulator by preventing particulate damage to the seating surface.

The two-stage design of this Silverline series regulator is essential for applications requiring unwavering delivery pressure. As a gas cylinder is depleted, the inlet pressure drops significantly. In a single-stage regulator, this can cause the outlet pressure to rise (the decaying inlet characteristic). The 221-00-03 eliminates this variable by stepping the pressure down in two stages, ensuring that the delivery pressure remains constant at your set point (0-60 PSIG) from a full cylinder down to nearly empty. This stability allows researchers and technicians to focus on their results rather than constantly adjusting equipment.

Equipped with a CGA 326 inlet, this model is typically suited for Nitrous Oxide and specific specialty gas mixtures. The unit is constructed from rugged brass bar stock but features a fully plated body, bonnet, and gauges. This plating not only provides a clean, professional aesthetic suitable for laboratory settings but also offers superior protection against environmental corrosion. The large 2-1/2 inch gauges are easy to read, and the unit includes a built-in capturable preset safety relief valve, ensuring safe operation even under high-pressure conditions.