323-81000000 - Miller Smith 320 Series High Purity Stainless Steel Two-Stage Regulator, 0-250 PSI

Precision Engineering for High Purity Applications

The Miller Smith 323-81-00-00-00 is a premier component of the 320 Silverline Series, engineered specifically for the rigorous demands of specialty gas delivery. This high-purity, two-stage regulator is designed to handle both corrosive and non-corrosive gases with unmatched stability. The core of its performance lies in its two-stage architecture, which provides a constant delivery pressure of 0-250 PSI regardless of fluctuations in the inlet pressure from the cylinder. This feature is critical in analytical and process applications where pressure decay can compromise results or safety.

Material integrity is paramount in the 323-81-00-00-00. The body and all wetted parts are constructed from 316 Stainless Steel and PCTFE, ensuring high resistance to corrosion and minimizing particle contamination. The regulator features a unique convoluted stainless steel diaphragm that utilizes a metal-to-metal seal. This design eliminates the need for elastomeric seals in the diaphragm assembly, thereby maximizing leak integrity and ensuring that the gas stream remains pure. A 316 stainless steel filtered seat is integrated into the design to trap particulates, further protecting the seat and extending the service life of the unit.

Safety and versatility are also key design elements. The regulator includes captured vent ports (1/16" FNPT) in the bonnet, allowing users to pipe hazardous or toxic gases away to a safe ventilation system in the rare event of a diaphragm failure. Additionally, the unit is designed to withstand internal vacuums, making it suitable for purging operations essential in high-purity gas changeovers. The 1/4" FNPT inlet and outlet ports provide flexibility for various fitting configurations, while the large 2-1/2 inch gauges offer clear readability. Note that a Cross Purge Assembly is recommended for use with this series to ensure effective purging of hazardous gas traces.