322-67240000 - Miller Smith 320 Series High Purity Stainless Steel Two-Stage Regulator, CGA 580, 0-100 PSI

Technical Overview: Miller Smith 320 Series High Purity Regulator

The Miller Smith 322-67-24-00-00 is a premium component within the 320 Silverline Series, engineered specifically for the precise management of high-purity, corrosive, and non-corrosive gases. This two-stage regulator is defined by its robust construction and exacting performance standards. The body is machined from 316 stainless steel bar stock, a material choice that ensures exceptional resistance to chemical attack and environmental corrosion. This metallurgy extends to the wetted parts, including the filtered seat and the convoluted diaphragm, ensuring that the gas stream remains uncontaminated by the regulator itself—a critical requirement for analytical instrumentation and high-purity process control.

Technically, the two-stage architecture of this device provides a distinct advantage in pressure stability. As the cylinder pressure decays from a maximum of 3500 PSIG down to depletion, single-stage regulators typically exhibit a rise in delivery pressure. The 320 Series eliminates this 'decaying inlet characteristic' by stepping the pressure down in two phases, guaranteeing a constant delivery pressure of 0-100 PSIG throughout the lifespan of the cylinder. The unit features a metal-to-metal diaphragm seal, which significantly enhances leak integrity compared to elastomeric seals, minimizing the risk of atmospheric contamination or fugitive emissions.

Safety and operational versatility are central to the design. The bonnet includes a captured vent port (1/16" FNPT), allowing operators to pipe hazardous or toxic gases away from the work area in the rare event of a diaphragm failure. Furthermore, the regulator is designed to withstand internal vacuums, making it compatible with rigorous purging operations essential for maintaining system purity during cylinder changeovers. The inclusion of PCTFE seats further enhances the unit's durability and chemical compatibility. This specific model is configured with a CGA 580 inlet connection, suitable for inert gases, and a 1/4" MNPT outlet for versatile system integration.