322-68250000 - Miller Smith 320 Series High Purity Stainless Steel Two-Stage Regulator, CGA 660, 0-100 PSI

High Purity Precision for Corrosive Environments

The Miller Smith 322-68-25-00-00 is a premium component of the 320 Series Silverline, engineered specifically for the rigorous demands of high purity and corrosive gas applications. Constructed from 316 stainless steel bar stock, this two-stage regulator is designed to maintain the integrity of the gas stream while providing exceptional durability against corrosive media. The unit features a CGA 660 stainless steel inlet connection, making it suitable for a specific range of hazardous or specialty gases often found in laboratory, research, and industrial semiconductor processes.

Advanced Material Construction

At the core of this regulator's performance is its material composition. The wetted parts are manufactured from 316 Stainless Steel and PCTFE (Polychlorotrifluoroethylene), chosen for their high resistance to chemical attack and ability to maintain purity. The 316 stainless steel filtered seat not only protects the regulator internals from particulate damage but also ensures that the gas stream remains uncontaminated, a critical factor in analytical applications. Furthermore, the diaphragm is a convoluted stainless steel type, which offers superior sensitivity and precise pressure control compared to standard flat diaphragms.

Leak Integrity and Safety

Safety is paramount when handling hazardous gases. The Miller Smith 320 Series utilizes a metal-to-metal diaphragm seal, eliminating the need for elastomeric seals that can degrade or outgas over time. This design provides maximum leak integrity, ensuring that hazardous gases are contained. For added safety, the regulator includes captured vent ports (1/16" FNPT) in the bonnet for both stages. This allows for the safe piping and venting of gases away from the work area in the unlikely event of a diaphragm failure. The regulator is also designed to withstand internal vacuums, making it compatible with purging operations essential for cylinder change-outs.

Operational Stability

As a two-stage regulator, this model excels in providing a constant delivery pressure regardless of fluctuations in the inlet pressure. As a gas cylinder empties, the pressure drops; a single-stage regulator would typically show a rise in outlet pressure (decay), but the two-stage mechanism of the 322-68-25-00-00 compensates for this, delivering a steady 0-100 PSI output throughout the life of the cylinder. This stability is crucial for calibration gases and sensitive instrumentation.