221-4006 - Miller Smith Silverline High Purity Analytical Two Stage Regulator, CGA 350, 0-60 PSI

Precision Control for Analytical Applications

The Miller Smith 221-40-06 Silverline High Purity Analytical Two Stage Regulator is engineered for the most demanding laboratory and industrial applications where gas purity and pressure stability are paramount. Designed specifically for high-purity, non-corrosive gases such as Hydrogen, Methane, and Carbon Monoxide (utilizing the CGA 350 connection), this regulator ensures that your sensitive analytical instruments receive a consistent and contaminant-free gas supply. The Silverline 220 Series is the preferred choice for professionals working with gas chromatography, thermal conductivity, flame ionization, and electron capture systems.

Advanced Two-Stage Design

Unlike single-stage regulators that allow delivery pressure to rise as the cylinder pressure falls (the decaying inlet characteristic), this two-stage regulator provides a constant delivery pressure from a full cylinder down to a nearly empty one. This feature is critical in analytical settings where even minor fluctuations in pressure can affect calibration results or baseline stability. The first stage reduces the high cylinder pressure to an intermediate level, while the second stage precisely modulates it to your set delivery pressure of 0-60 PSIG.

Superior Materials and Construction

To maintain the integrity of high-purity gas streams, the 221-40-06 features a stainless steel diaphragm. Unlike rubber or neoprene diaphragms, stainless steel does not absorb or release contaminants, ensuring that the gas purity is maintained from the cylinder to the instrument. The regulator body, bonnet, and gauges are fully plated to resist corrosion and maintain a clean laboratory appearance. Additionally, a filtered seat mechanism prevents particulate damage, extending the service life of the unit and further protecting downstream equipment.

Safety and Reliability

Safety is built into every aspect of the Miller Smith design. The regulator includes a built-in capturable preset safety relief valve that protects the regulator components from over-pressurization. It is also designed to withstand vacuums generated during purging operations, making it robust enough for complex gas management systems. With a maximum inlet pressure rating of 3500 PSIG, it is compatible with high-pressure cylinders commonly used in industrial and research facilities.