620-40060000 - Miller Smith 620 Series High Purity Two-Stage Regulator, CGA 350, 0-30 PSI

Precision Control for Specialty Gases

The Miller Smith 620-40-06-00-00 Silverline High Purity Brass Two Stage Regulator is engineered for applications demanding the utmost precision and gas purity. Designed specifically for non-corrosive specialty gases such as Hydrogen and Methane (utilizing the CGA 350 connection), this regulator ensures that your critical processes receive a stable and contaminant-free gas flow. The 620 Series Silverline is a testament to Miller Smith's commitment to quality, featuring a nickel-plated brass bar stock body that provides both durability and a clean, professional aesthetic suitable for laboratory and industrial environments.

Advanced Diaphragm Technology

At the heart of this regulator is a specially designed stainless steel diaphragm. Unlike elastomeric diaphragms that can outgas or degrade over time, the stainless steel construction ensures maximum accuracy and maintains the integrity of the gas stream. This is complemented by a metal-to-metal body-to-diaphragm seal, which eliminates the need for O-rings that could potentially introduce impurities. This design feature is critical for high-purity applications where even trace contamination can compromise analytical results or process outcomes.

Two-Stage Stability

Stability is paramount in specialty gas delivery. The two-stage design of the 620-40-06-00-00 reduces cylinder pressure in two steps, providing a constant outlet pressure regardless of fluctuations in the inlet pressure. As the gas cylinder empties, single-stage regulators often experience a rise in delivery pressure (known as the decay effect). This two-stage regulator eliminates that variable, ensuring that your delivery pressure remains at the set point of 0-30 PSIG (or vacuum to 30 PSIG) throughout the life of the cylinder. This reliability allows operators to focus on their work without constantly adjusting regulator settings.

Safety and Versatility

Safety is integrated into every aspect of the design. The regulator features capturable vents in the bonnet (1/16" FNPT) for both stages. This allows for the safe piping of vented gases away from the work area, a crucial feature when handling flammable or hazardous gases like Hydrogen. Additionally, the regulator is capable of withstanding internal vacuums, making it suitable for purging operations essential in maintaining system purity. The included 2-1/2 inch single scale gauges provide clear, easy-to-read pressure monitoring, ensuring operators always have visual confirmation of system status.