254-0006 - Miller Smith Silverline 250 High Purity Regulator CGA 350

Technical Overview: Miller Smith 254-00-06 Silverline Regulator

The Miller Smith 254-00-06 is a premium single-stage regulator from the Silverline 250 Series, engineered specifically for high-purity analytical applications and liquid cylinder usage. This unit is configured with a CGA 350 inlet connection, making it suitable for gases such as Hydrogen, Methane, and Carbon Monoxide, typically found in laboratory and industrial specialty gas environments. The regulator operates with a maximum inlet pressure of 3500 PSIG and provides a precise delivery pressure range of 0-200 PSIG.

Structurally, the regulator is built from rugged brass bar stock, which is then fully nickel-plated. This plating extends to the bonnet and gauges, offering superior protection against corrosion and environmental wear, a critical feature for equipment used in chemical processing or cryogenic environments. The core of its performance lies in the large 1-7/8 inch stainless steel diaphragm. Unlike elastomeric diaphragms, the stainless steel construction provides a stable, non-permeable barrier that ensures the integrity of high-purity gas streams and offers extended service life under the thermal stresses of cryogenic gas withdrawal.

A defining technical feature of this model is the Smith exclusive Sure-Seat™ technology. This filtered seat design prevents particulate contamination from entering the high-pressure seating area, which is a common cause of regulator failure and creep. By protecting the seat, the regulator maintains a tight seal and consistent performance over a longer operational lifespan. The unit is designed with a rear-entry (back mount) configuration, optimizing the physical layout for connection to liquid cylinders where space and orientation are often constrained. It also includes a built-in capturable preset safety relief valve for over-pressure protection.

Instrumentation is provided by large 2-1/2 inch single-scale gauges, which improve readability from a distance compared to standard 2-inch gauges. This regulator is strictly designed for the control of gas delivery; while it connects to liquid cylinders, it is intended for the gas phase withdrawal or gas use applications, not for controlling liquid flow directly.