321-00230000 - Miller Smith 320 Series High Purity Stainless Steel Two-Stage Regulator, CGA 350, 0-50 PSI

High Purity Precision for Specialty Gases

The Miller Smith 321-00-23-00-00 is a premium 320 Series Silverline two-stage regulator engineered specifically for high-purity and corrosive gas applications. Constructed from 316 stainless steel bar stock, this regulator is designed to maintain the integrity of the gas stream while resisting the harsh effects of corrosive media. It features a CGA 350 inlet connection, making it suitable for gases such as Hydrogen, Methane, Carbon Monoxide, and Ethylene, with a delivery pressure range of 0-50 PSIG.

Advanced Material Construction

At the core of this regulator is a convoluted stainless steel diaphragm that provides exceptional sensitivity and control accuracy. The metal-to-metal diaphragm seal eliminates the need for elastomeric seals in the gas path, ensuring maximum leak integrity—a critical factor when handling hazardous or high-purity gases. The seat is manufactured from PCTFE and includes a 316 stainless steel filter, which protects the seating surface from particulate contamination, thereby extending the service life of the unit and maintaining gas purity.

Safety and Reliability

Safety is paramount in the design of the 320 Series. The regulator includes captured vent ports (1/16" FNPT) in the bonnet, allowing users to pipe hazardous gases away to a safe ventilation system in the unlikely event of a diaphragm failure. Furthermore, the regulator is designed to withstand internal vacuums, making it compatible with purging operations essential for changing cylinders of hazardous gases. A Cross Purge Assembly is recommended for use with this series to ensure effective removal of hazardous gas traces.

Stable Delivery Pressure

As a two-stage regulator, the 321-00-23-00-00 reduces cylinder pressure in two steps, providing a constant delivery pressure regardless of fluctuations in the inlet pressure as the cylinder empties. This feature is indispensable for analytical applications, chromatography, and other laboratory processes where pressure stability is non-negotiable. The unit is equipped with large, easy-to-read 2-1/2" single scale gauges and is threaded for front panel mounting, offering versatility in installation.