623-01060000 - Miller Smith 620 Silverline High Purity 2-Stage Regulator CGA 350

Precision Control for Specialty Gases

The Miller Smith 623-01-06-00-00 Silverline High Purity Brass Two Stage Regulator is a premium gas control device engineered for the rigorous demands of analytical laboratories, research facilities, and industrial process control. Part of the esteemed 620 Silverline Series, this regulator is specifically designed to handle non-corrosive specialty gases such as Hydrogen and Methane (CGA 350) with unmatched precision. The unit is constructed from high-quality brass bar stock that is nickel-plated, offering a robust and aesthetically clean finish that resists environmental corrosion while maintaining the structural integrity required for high-pressure applications.

At the heart of this regulator lies a specially designed stainless steel diaphragm. Unlike elastomeric diaphragms that can outgas or absorb impurities, the stainless steel construction ensures that the gas stream remains chemically inert and pure. This feature is critical for applications where even microscopic contamination can compromise results. The regulator employs a metal-to-metal seal between the body and the diaphragm, eliminating the need for gaskets that could degrade over time, thereby enhancing the leak integrity of the system. A filtered seat is also integrated into the design to trap any particulate matter, further protecting the seating surface and downstream equipment from contamination.

The two-stage regulation mechanism is a defining feature of the 623-01-06-00-00. In single-stage regulators, the outlet pressure can rise as the cylinder pressure falls—a phenomenon known as the supply pressure effect. This Miller Smith regulator eliminates that issue by reducing pressure in two steps, delivering a constant and stable outlet pressure of up to 250 PSI regardless of fluctuations in the inlet supply. This stability is essential for long-duration processes where manual adjustment is impractical. Furthermore, the bonnet includes a capturable 1/16" FNPT vent port, allowing users to pipe vented gases away from the workspace, a crucial safety feature when working with flammable or hazardous gases. The regulator is also capable of withstanding internal vacuums, making it suitable for purging operations.