620-01060000 - Miller Smith 620 Series High Purity 2-Stage Regulator, CGA 350, 0-25 PSI

Precision High Purity Regulation for Specialty Gases

The Miller Smith 620 Series Silverline High Purity Brass Two-Stage Regulator is engineered for applications demanding the highest levels of gas stream purity and pressure stability. Designed specifically for non-corrosive specialty gases, this regulator features a robust nickel-plated brass bar stock body that resists environmental corrosion while maintaining a pristine internal flow path. The unit utilizes a two-stage reduction mechanism, which is critical for analytical applications; it compensates for the drop in cylinder pressure as the gas is consumed, ensuring the outlet pressure remains rock-steady at the set point without user intervention.

At the heart of the 620 Series is a unique stainless steel diaphragm. Unlike elastomeric diaphragms that can absorb and release contaminants (outgassing), the stainless steel construction provides an impermeable barrier, preserving the integrity of high-purity gases. The seal between the body and the diaphragm is a metal-to-metal design, eliminating the need for gaskets that could otherwise compromise the gas purity. This construction allows the regulator to withstand internal vacuums, making it suitable for rigorous purging operations required in laboratory settings.

Safety and versatility are paramount in the 620 Series design. The regulator includes capturable vent ports (1/16" FNPT) on the bonnet, allowing users to pipe away hazardous or flammable gases in the unlikely event of a diaphragm failure. This specific model comes equipped with a CGA 350 connection, making it compatible with Hydrogen, Methane, Carbon Monoxide, and other flammable gas mixtures. With a delivery range of 0-25 PSI and a maximum inlet pressure of 3500 PSI, it is perfectly sized for low-pressure analytical instruments, carrier gas applications, and process control where precision is non-negotiable.

Additional features include a 316 stainless steel filter located at the inlet to trap particulates, protecting the seat and extending the service life of the regulator. The 2-1/2" single scale gauges provide clear, easy-to-read pressure monitoring. Whether for gas chromatography, emission monitoring systems, or research laboratories, the Miller Smith 620 Series delivers the reliability and purity required for critical results.