621-20060000 - Miller Smith 620 Silverline High Purity 2-Stage Regulator CGA 350

Precision Control for Specialty Gases

The Miller Smith 621-20-06-00-00 is a premium offering from the 620 Silverline Series, engineered specifically for high-purity gas applications requiring absolute stability and cleanliness. This two-stage regulator is designed to provide a constant outlet pressure ranging from 0 to 60 PSI, regardless of fluctuations in the inlet pressure, making it indispensable for laboratory, analytical, and precise industrial processes. With a maximum inlet pressure rating of 3500 PSI, it is robust enough to handle high-pressure cylinders while delivering the delicate control needed for sensitive downstream equipment.

Advanced Material Construction

Constructed from nickel-plated brass bar stock, the body of this regulator offers superior durability and resistance to environmental corrosion. The critical component—the diaphragm—is manufactured from stainless steel. Unlike rubber or neoprene diaphragms, the stainless steel construction prevents contamination of the gas stream through off-gassing or absorption, ensuring that the purity of the gas delivered matches the purity of the source. The metal-to-metal seal between the body and the diaphragm further reinforces this integrity, eliminating the need for gaskets that could degrade over time.

Safety and Reliability Features

Safety is paramount when handling specialty gases such as Hydrogen and Methane, for which the CGA 350 connection is standard. The Miller Smith 620 series features a capturable vent in the bonnet (1/16" FNPT). This allows operators to pipe vented gases away to a safe location in the rare event of a diaphragm failure, a critical feature for hazardous gas environments. Additionally, the regulator includes a 316 stainless steel filter at the inlet to trap particulates, protecting the seat and extending the service life of the unit. The regulator is also designed to withstand internal vacuums, making it suitable for purge cycles without damage.

Technical Specifications

This model features a 2-1/2 inch single scale gauge for easy reading of delivery pressure. The threaded front and rear bonnet allow for versatile panel mounting configurations if required. Whether used for chromatography, laser mixtures, or emission monitoring systems, the Miller Smith 621-20-06-00-00 delivers the reliability and precision demanded by high-purity applications.