223-8208 - Miller Smith Silverline Two-Stage High Purity Oxygen Regulator CGA 540

Precision Control for Analytical Gas Applications

The Miller Smith 223-82-08 Silverline High Purity Analytical Two Stage Regulator is a premium instrument designed for environments where gas purity and pressure stability are non-negotiable. Part of the esteemed 220 Silverline Series, this regulator is constructed from rugged brass bar stock that is fully plated—including the body, bonnet, and gauges—to resist corrosion and maintain a clean aesthetic suitable for laboratory settings. It is specifically engineered for non-corrosive high-purity gases, making it an excellent choice for gas chromatography applications such as thermal conductivity, flame ionization, and electron capture detection.

A defining feature of this model is its stainless steel diaphragm. Unlike elastomeric diaphragms that can outgas or absorb impurities, the stainless steel construction ensures that the gas stream remains uncontaminated, preserving the integrity of sensitive analytical results. The regulator also features a filtered seat which traps microscopic particulates, further enhancing gas purity and extending the service life of the internal components. The two-stage design is critical for analytical work; it compensates for the natural drop in cylinder pressure as gas is consumed, delivering a constant outlet pressure from a full cylinder down to a nearly empty one without requiring manual adjustment.

Safety and operational versatility are built into the 223-82-08. It includes an automatic reseating safety relief valve to protect against over-pressurization and is capable of withstanding vacuums generated during purging operations. The large 2-1/2 inch single-scale gauges provide clear, easy-to-read pressure monitoring. With a CGA 540 inlet for oxygen service and a delivery range of 0-150 PSIG, this regulator offers the reliability and precision demanded by high-stakes analytical processes.