620-00020000 - Miller Smith 620 Silverline High Purity Two-Stage Regulator, CGA 320, 0-25 PSI

Precision Control for Specialty Gases

The Miller Smith 620-00-02-00-00 Silverline High Purity Brass Two-Stage Regulator is engineered for applications demanding the utmost stability and cleanliness in gas delivery. Designed specifically for non-corrosive gases like Carbon Dioxide (CO2), this regulator features a CGA 320 inlet connection and delivers a precise pressure range of 0-25 PSIG. As a member of the esteemed 620 Silverline series, it combines the durability of industrial equipment with the refinement required for laboratory and analytical environments.

Two-Stage Architecture for Stability

One of the defining characteristics of this regulator is its two-stage design. In single-stage regulators, the outlet pressure can fluctuate—often rising—as the cylinder pressure decays, a phenomenon known as the supply pressure effect. The 620 Series eliminates this issue by reducing pressure in two steps, ensuring a constant delivery pressure throughout the life of the cylinder. This feature is critical for long-duration processes where stability is paramount and operator intervention must be minimized.

High Purity Construction

To maintain gas integrity, the regulator utilizes a stainless steel diaphragm. Unlike elastomeric diaphragms that can outgas or absorb contaminants, stainless steel provides a non-permeable barrier that preserves the purity of the gas stream. The metal-to-metal seal between the body and the diaphragm further enhances leak integrity, ensuring that atmospheric contaminants do not enter the system. A 316 stainless steel filter is integrated into the inlet to trap particulates, protecting the seat and extending the service life of the unit.

Robust and Versatile Design

The body is machined from brass bar stock and finished with nickel plating, offering excellent resistance to environmental corrosion and a professional aesthetic. The unit is designed with threaded front and rear bonnets, making it suitable for panel mounting in gas distribution systems or instrument benches. For safety, the bonnet includes a capturable vent (1/16" FNPT), allowing hazardous or asphyxiating gases to be piped away safely in the event of a diaphragm failure.