620-02060000 - Miller Smith 620 Series High Purity Two-Stage Regulator CGA 350

Precision High Purity Gas Control

The Miller Smith 620-02-06-00-00 Silverline High Purity Brass Two Stage Regulator is an advanced pressure control device engineered for analytical and specialty gas applications. Designed specifically for non-corrosive gases requiring absolute stability, this regulator features a robust two-stage architecture. Unlike single-stage regulators that allow delivery pressure to rise as the cylinder pressure decays, the 620 Series maintains a constant outlet pressure throughout the life of the cylinder. This characteristic is critical for laboratory environments, chromatography, and process control where pressure fluctuations can compromise results.

Material Integrity and Design

Constructed from nickel-plated brass bar stock, the body of the regulator offers superior durability and resistance to environmental corrosion. The heart of the device is its specially designed stainless steel diaphragm. This diaphragm provides a metal-to-metal seal with the body, eliminating the need for elastomeric seals that can outgas or absorb contaminants. This design ensures the integrity of the gas stream is maintained from the cylinder to the application. A 316 stainless steel filter is integrated into the seat assembly to trap particulates, further protecting the seat and ensuring long-term reliability.

Safety and Connectivity

Safety is paramount in high-purity gas handling. The 620 Series features capturable vents in the bonnet (1/16" FNPT), allowing for the safe piping of vented gases away from the work area in the event of a diaphragm failure—a crucial feature when handling flammable gases like Hydrogen or Methane (CGA 350). This specific model (620-02-06-00-00) is configured with a CGA 350 inlet connection and provides a delivery pressure range of 0-25 PSI (or vacuum to 30 PSI depending on gauge configuration). It also includes a diaphragm packless outlet valve, ensuring that the flow control mechanism does not introduce contamination into the high-purity stream.

Technical Specifications

The regulator is rated for a maximum inlet pressure of 3500 PSI. The 2-1/2 inch single scale gauges provide clear, accurate readings of both cylinder and delivery pressures. Threaded front and rear bonnets allow for versatile panel mounting options if required. Whether used for carrier gases, calibration mixtures, or other high-purity non-corrosive applications, the Miller Smith 620 Series delivers the precision and purity required by demanding industrial and scientific standards.