620-83080000 - Miller Smith Silverline High Purity Brass Two Stage Regulator, CGA 540, 0-25 PSI

Precision Control for Specialty Gas Applications

The Miller Smith 620 Series Silverline High Purity Brass Two Stage Regulator is engineered to meet the rigorous demands of analytical and specialty gas applications. Designed for non-corrosive gases, this regulator exemplifies precision engineering with its two-stage construction, ensuring that delivery pressure remains constant even as the cylinder pressure fluctuates. This feature is critical for laboratory environments and sensitive instrumentation where pressure drift can compromise data integrity or process stability.

At the core of the 620 Series is a specially designed 316 stainless steel diaphragm. Unlike elastomeric diaphragms that can absorb or release contaminants, the stainless steel construction ensures zero off-gassing, preserving the high purity of the gas stream. The metal-to-metal seal between the body and the diaphragm further eliminates the need for O-rings, removing another potential source of contamination and leak paths. The body itself is machined from brass bar stock and finished with nickel plating, providing a robust, diffusion-resistant housing that maintains system purity while offering excellent durability.

Safety and versatility are also paramount in the design. The regulator features a capturable vent in the bonnet (1/16" FNPT), allowing users to pipe away vented gases safely in the event of a diaphragm failure—a crucial feature when working in enclosed spaces or with specific safety protocols. Additionally, the regulator is designed to withstand internal vacuums, making it suitable for purging operations without risk of damage or seal compromise. With a delivery range of 0-25 PSI and a CGA 540 connection, this unit is perfectly tailored for high-precision oxygen service in research, chromatography, and emission monitoring applications.

The unit comes equipped with a large, easy-to-read 2-1/2 inch single scale gauge and features threaded front and rear bonnets, simplifying panel mounting installations. Whether for a standalone cylinder or an integrated gas delivery system, the Miller Smith 620 Series delivers the reliability and purity required for high-stakes analytical work.