312-00220000 - Miller Smith 310 Series High Purity Stainless Steel Regulator CGA 330

Technical Overview of the Miller Smith 310 Silverline Series

The Miller Smith 312-00-22-00-00 is a premium component within the 310 Silverline Series, engineered specifically for the rigorous demands of high purity and corrosive gas systems. This single-stage regulator is meticulously constructed from 316 stainless steel bar stock, ensuring structural integrity and chemical resistance against aggressive media. The unit features a CGA 330 stainless steel inlet connection, making it compatible with a specific range of corrosive and inert gases often found in laboratory and industrial processing environments.

At the core of this regulator's performance is its convoluted stainless steel diaphragm. Unlike standard rubber or elastomer diaphragms, this metal-to-metal seal design eliminates outgassing and permeation, providing a leak integrity that is critical for toxic or high-purity applications. The diaphragm's convoluted shape enhances sensitivity, allowing for precise regulation of delivery pressure between 0 and 100 PSIG, even as cylinder pressure decays. The seat assembly utilizes 316 PCTFE (Polychlorotrifluoroethylene), a material chosen for its exceptional dimensional stability and resistance to chemical attack, ensuring a long service life and reliable shut-off.

Safety and integration are key design elements. The regulator includes a captured vent port (1/16" FNPT) located in the bonnet, which allows operators to pipe hazardous fumes away to a safe scrubbing or ventilation system in the event of a diaphragm failure. The body is machined with tapping for rear panel mounting, and the bonnet is threaded for front panel mounting, offering versatile installation options for gas cabinets and control panels. With a maximum inlet pressure rating of 3500 PSIG, this regulator is a robust solution for critical gas delivery systems requiring zero contamination.