321-00220000 - Miller Smith 320 Series Stainless Steel Two-Stage Regulator, CGA 330, 0-50 PSI

High Purity Stainless Steel Pressure Control

The Miller Smith 321-00-22-00-00 is a premium high-purity, two-stage regulator from the 320 Silverline Series, specifically engineered for the precise management of corrosive and non-corrosive gases. Constructed from high-grade 316 stainless steel bar stock, this regulator is designed to withstand the harsh nature of specialty gases while maintaining exceptional cleanliness and leak integrity. The unit features a CGA 330 inlet connection, making it suitable for specific corrosive gas applications, and delivers a consistent pressure range of 0-50 PSIG.

At the core of this regulator is a convoluted stainless steel diaphragm that provides sensitive and accurate pressure control. The metal-to-metal diaphragm seal eliminates the need for elastomeric seals in the gas stream, thereby maximizing leak integrity and reducing the risk of contamination. A 316 stainless steel filtered seat further enhances gas stream purity and extends the service life of the component by preventing particulate damage. The seat material is PCTFE, chosen for its chemical resistance and durability in high-pressure environments.

Safety and versatility are paramount in the 320 Series design. The regulator includes captured vent ports (1/16" FNPT) in the bonnet, allowing users to pipe hazardous gases away safely in the unlikely event of a diaphragm failure. Additionally, the regulator is designed to withstand internal vacuums, facilitating effective purging operations during cylinder changes. With large 2-1/2" single-scale gauges and threaded bonnets for panel mounting, this regulator offers both readability and flexible installation options for sophisticated gas delivery systems.