620-40030000 - Miller Smith 620 Silverline High Purity Two-Stage Regulator CGA 326

Precision Control for Specialty Gases

The Miller Smith 620 Series Silverline High Purity Brass Two Stage Regulator is engineered for applications where gas purity and stable pressure delivery are non-negotiable. Designed specifically for non-corrosive specialty gases, this regulator features a robust nickel-plated brass bar stock body that ensures durability while maintaining a pristine gas path. The unit is equipped with a CGA 326 connection, commonly used for Nitrous Oxide and other specific specialty gas mixtures, making it an essential tool for laboratory, analytical, and high-precision industrial environments.

Uncompromised Purity and Stability

At the heart of the 620 Series is a unique stainless steel diaphragm. Unlike elastomeric diaphragms that can outgas or absorb contaminants, the stainless steel construction provides a metal-to-metal seal, ensuring that the gas stream remains pure from the cylinder to your application. This feature is critical for gas chromatography, EPA protocol gases, and laser gas systems where even trace contamination can skew results. The regulator also includes a filtered seat to further protect the gas stream from particulate matter.

Advanced Two-Stage Performance

As a two-stage regulator, this device steps down cylinder pressure in two distinct phases. This design allows it to provide a constant outlet pressure regardless of fluctuations in the inlet pressure. As your gas cylinder empties and pressure drops, a single-stage regulator would typically show a rise in delivery pressure (the "decaying inlet characteristic"). The Miller Smith 620 eliminates this issue, delivering a steady 0-30 PSI output (optimized for 25 PSI working pressure) throughout the life of the cylinder, allowing operators to "set and forget" without constant monitoring.

Safety and Versatility

Safety is paramount in high-purity applications. The bonnet features a captured 1/16" FNPT vent port for both stages, allowing hazardous or asphyxiating gases to be piped away safely in the event of a diaphragm failure. Additionally, the regulator is designed to withstand internal vacuums, making it suitable for purge cycles essential in maintaining system purity. With threaded front and rear bonnets, it is also ready for panel mounting, offering flexibility for integrated system designs.