323-00230000 - Miller Smith 320 Series Stainless Steel Two-Stage Regulator CGA 350

Technical Overview of the Miller Smith 320 Series High Purity Regulator

The Miller Smith 323-00-23-00-00 is a premium high-purity, two-stage regulator engineered specifically for the control of corrosive and non-corrosive gases where precise and stable delivery pressure is critical. Part of the renowned 320 Silverline Series, this regulator is manufactured from 316 stainless steel bar stock, ensuring robust resistance to chemical attack and maintaining the integrity of high-purity gas streams. The unit features a CGA 350 inlet connection, making it suitable for gases such as hydrogen, methane, and other flammable or specialty mixtures requiring this specific fitting standard.

Technically, the regulator excels due to its two-stage architecture. Unlike single-stage counterparts, this device reduces pressure in two steps, which provides a constant delivery pressure of 0-250 PSI regardless of fluctuations in the inlet pressure as the supply cylinder empties. This is vital for analytical and process applications where pressure drift cannot be tolerated. The internal design utilizes a convoluted stainless steel diaphragm that offers exceptional sensitivity and response to pressure changes. A metal-to-metal diaphragm seal is employed to ensure maximum leak integrity, a critical feature when handling hazardous or expensive specialty gases.

Safety and longevity are paramount in the 323-00-23-00-00 design. The seat is constructed from PCTFE and includes a 316 stainless steel filter, which protects the seating surface from particulate contamination, thereby extending service life and maintaining gas purity. Furthermore, the bonnet features a captured vent port (1/16" FNPT), allowing operators to pipe vented gases away to a safe location in the event of a diaphragm failure—a mandatory safety requirement for many hazardous gas applications. The regulator is also designed to withstand internal vacuums, making it compatible with rigorous purging operations necessary during cylinder change-outs.