623-42100000 - Miller Smith Silverline 2-Stage High Purity Regulator CGA 590 250 PSI

High Purity Precision for Specialty Gases

The Miller Smith 623-42-10-00-00 Silverline High Purity Brass Two Stage Regulator is engineered for applications demanding the utmost precision and cleanliness. Designed as part of the renowned 620 Silverline series, this regulator is specifically tailored for non-corrosive specialty gases and industrial air utilizing a CGA 590 connection. Its primary function is to provide a stable, constant delivery pressure ranging from 0 to 250 PSI, regardless of fluctuations in the inlet pressure as the gas cylinder is depleted. This two-stage capability is critical for analytical laboratories, gas chromatography, and process control systems where pressure drift cannot be tolerated.

At the heart of this regulator is a specially designed stainless steel diaphragm. Unlike elastomeric diaphragms that can off-gas and contaminate sensitive gas streams, the stainless steel construction ensures that the purity of the gas is maintained from the cylinder to the application. The metal-to-metal seal between the body and the diaphragm further eliminates the need for gaskets that could introduce impurities. The body itself is machined from brass bar stock and nickel-plated, providing a robust, non-porous surface that resists diffusion and corrosion, ensuring a long service life even in demanding environments.

Safety and versatility are also key components of the 623-42-10-00-00. The regulator features a capturable vent in the bonnet (1/16" FNPT), allowing users to pipe vented gases away to a safe location—a crucial feature when working with asphyxiants or other hazardous gases. Additionally, this model comes equipped with a 1/8" tube stainless steel needle valve, offering fine flow control directly at the outlet. With a maximum inlet pressure rating of 3500 PSI and a filtered seat to prevent particulate damage, this Miller Smith regulator represents the gold standard in high-purity gas control.