620-03020000 - Miller Smith 620 Silverline High Purity CO2 Regulator, Two-Stage, 0-25 PSIG

Precision Control for Specialty Gases

The Miller Smith 620-03-02-00-00 Silverline High Purity Brass Two Stage Regulator is an instrument-grade device engineered for the precise management of non-corrosive gases. Designed specifically for applications requiring high gas stream purity and stable delivery pressure, this regulator is a staple in laboratory, research, and analytical environments. The 620 Series distinguishes itself with a two-stage reduction mechanism, which provides a constant outlet pressure regardless of fluctuations in the inlet pressure. This feature is particularly vital when draining cylinders, as it negates the "supply pressure effect" common in single-stage alternatives.

Material Integrity and Purity

At the core of the 620 Silverline's performance is its construction. The body is machined from brass bar stock and finished with nickel plating, offering a non-porous, corrosion-resistant surface that maintains the integrity of the gas stream. Crucially, the regulator features a specially designed stainless steel diaphragm. Unlike elastomeric diaphragms that can off-gas or absorb impurities, the stainless steel component ensures that the gas remains uncontaminated. The seal between the body and the diaphragm is a metal-to-metal interface, further eliminating potential sources of contamination and ensuring a leak-tight seal capable of withstanding internal vacuums during purging operations.

Advanced Features for Safety and Usability

Safety and operational flexibility are built into the design. The regulator includes a capturable vent in the bonnet (1/16" FNPT), allowing users to pipe vented gases away safely in the event of a diaphragm failure—a critical feature when working with hazardous or asphyxiating gases in confined spaces. The unit is also equipped with a 316 stainless steel filter at the seat to prevent particulate damage, extending the service life of the regulator. For ease of integration into systems, the bonnet is threaded front and rear, supporting panel mounting configurations. The large 2-1/2 inch single scale gauge provides clear, immediate readouts of delivery pressure, ensuring operators can monitor system performance with confidence.