621-01050000 - Miller Smith Silverline 620 Series 2-Stage Air Regulator - CGA 346 - 0-60 PSI

High Purity Precision for Analytical Applications

The Miller Smith 621-01-05-00-00 Silverline High Purity Brass Two Stage Regulator is engineered for professionals who demand uncompromising precision and gas purity. Designed specifically for non-corrosive gases like Industrial Air (CGA 346), this regulator is a staple in laboratory environments, gas chromatography setups, and emission monitoring systems. The core of its performance lies in its two-stage design, which steps down cylinder pressure in two distinct phases. This mechanism ensures that the delivery pressure remains constant at your set point (0-60 PSI), even as the supply cylinder empties and inlet pressure decays—a critical feature for long-duration analytical processes.

Advanced Material Construction

Unlike standard industrial regulators that may use rubber or neoprene diaphragms, the 620 Silverline series features a high-grade stainless steel diaphragm. This choice of material is pivotal for high-purity applications as it eliminates the risk of off-gassing or hydrocarbon contamination that can occur with elastomeric components. The body is machined from nickel-plated brass bar stock, providing a robust, non-porous surface that resists corrosion and maintains the integrity of the gas stream. The metal-to-metal seal between the body and the diaphragm further ensures a leak-tight enclosure without the use of gaskets that could degrade over time.

Safety and Reliability

Safety is paramount in high-pressure gas handling. This regulator includes a capturable vent in the bonnet (1/16" FNPT), allowing users to pipe vented gases away from the work area in the event of a diaphragm failure—an essential feature for enclosed lab spaces. Additionally, the unit is equipped with a filtered seat to trap microscopic particulates, protecting the internal mechanism and ensuring the purity of the downstream gas. With a maximum inlet pressure rating of 3500 PSI, it is compatible with high-pressure cylinders, providing versatility across various supply sources.