621-83060000 - Miller Smith 620 Series Silverline High Purity Two-Stage Regulator, CGA 350, 0-60 PSI

Precision Control for High Purity Applications

The Miller Smith 621-83-06-00-00 Silverline High Purity Brass Two Stage Regulator is an elite instrument engineered for the precise management of non-corrosive specialty gases. Part of the renowned 620 Silverline Series, this regulator is specifically configured with a CGA 350 inlet connection, making it the standard choice for flammable gases such as Hydrogen, Methane, and Carbon Monoxide in analytical and laboratory environments. The unit features a delivery pressure range of 0-60 PSI, ideal for applications requiring low-to-medium pressure stability.

Advanced Two-Stage Design

Unlike single-stage counterparts, this two-stage regulator reduces cylinder pressure in two distinct steps. This mechanical advantage provides a constant delivery pressure regardless of fluctuations in the inlet pressure. As a gas cylinder empties and its internal pressure drops, a single-stage regulator would typically show a rise in outlet pressure (the decaying inlet characteristic). The Miller Smith 620 Series eliminates this variable, ensuring that your sensitive downstream equipment receives a steady, unwavering flow of gas from a full cylinder down to an empty one.

Material Integrity and Purity

Purity is paramount in the design of the Silverline series. The regulator is constructed with a nickel-plated brass bar stock body, offering superior durability and resistance to environmental corrosion. Internally, it utilizes a stainless steel diaphragm rather than rubber or neoprene. This is critical for high-purity applications as it prevents the diffusion of atmospheric contaminants and eliminates the risk of off-gassing that can occur with elastomeric components. The metal-to-metal seal between the body and the diaphragm further secures the gas stream against external contamination.

Safety and Versatility

Safety features are integral to the 621-83-06-00-00. It includes a capturable vent in the bonnet (1/16" FNPT), allowing operators to pipe vented gases away from the work area—a mandatory safety requirement when handling hazardous or flammable gases like Hydrogen. Additionally, the regulator is designed to withstand internal vacuums, making it suitable for purge cycles essential in maintaining system purity. With a maximum inlet pressure rating of 3500 PSI and a filtered seat to trap particulates, this regulator is built for reliability and performance.