622-40090000 - Miller Smith 620 Series Silverline High Purity Two-Stage Regulator, CGA 580, 0-100 PSI

Precision Control for Specialty Gas Applications

The Miller Smith 622-40-09-00-00 Silverline High Purity Brass Two Stage Regulator is an exemplary piece of engineering designed for environments where gas purity and pressure stability are non-negotiable. Part of the renowned 620 Silverline Series, this regulator is specifically constructed to handle non-corrosive specialty gases with the utmost precision. The core of its performance lies in its two-stage design. Unlike single-stage counterparts that exhibit a 'decaying' outlet pressure as the supply cylinder empties, this two-stage mechanism reduces pressure in steps, ensuring that the delivery pressure remains constant at your set point (0-100 PSI) regardless of fluctuations in the inlet pressure. This feature is critical for analytical instrumentation, chromatography, and laser applications where even minor pressure variances can compromise results.

Material integrity is central to the 622-40090000's design. The body is machined from brass bar stock and finished with nickel plating, offering a robust housing that resists environmental corrosion while maintaining a high level of cleanliness. Crucially, the regulator features a stainless steel diaphragm. In high-purity applications, elastomeric diaphragms can introduce contaminants through outgassing or permeation. The stainless steel diaphragm eliminates this risk, ensuring that the gas stream remains as pure at the outlet as it was in the cylinder. Furthermore, the metal-to-metal seal between the body and the diaphragm removes the need for internal O-rings in the gas stream, creating a leak-tight seal that maintains system integrity.

Safety and adaptability are also key features. The regulator is rated for a maximum inlet pressure of 3500 PSI, making it compatible with modern high-pressure cylinders. It comes equipped with a CGA 580 inlet connection, standard for inert gases such as Nitrogen, Argon, and Helium. The bonnet includes a captured 1/16" FNPT vent, allowing for the piping away of gases in the unlikely event of a diaphragm failure—a standard requirement for many laboratory safety protocols. The outlet is fitted with a 1/4" FNPT connection and a needle valve, providing operators with fine flow control directly at the source. Whether for laboratory analysis, research and development, or high-precision industrial processes, the Miller Smith 622-40090000 delivers reliable, contamination-free performance.