320-00230000 - Miller Smith 320 Series Stainless Steel Two-Stage Regulator, CGA 350, 0-25 PSI

High Purity Pressure Control for Specialty Gases

The Miller Smith 320 Series High Purity Two-Stage Regulator is engineered to meet the rigorous demands of analytical laboratories and industrial applications requiring precise control of corrosive and non-corrosive gases. Model 320-00-23-00-00 is specifically configured with a CGA 350 connection, making it suitable for flammable gases such as hydrogen and methane, as well as other specialty gas mixtures. The regulator features a robust 316 stainless steel bar stock body and a convoluted stainless steel diaphragm, ensuring compatibility with high-purity gas streams where contamination must be minimized.

One of the defining characteristics of the 320 Series is its metal-to-metal diaphragm seal. This design eliminates the need for elastomeric seals in the gas stream, thereby providing maximum leak integrity and preventing off-gassing that could compromise analytical results. The two-stage reduction mechanism is critical for applications requiring stable delivery pressure; it compensates for the drop in cylinder pressure as the gas is consumed, maintaining a consistent 0-25 PSI output without the need for constant manual adjustment. This stability is essential for sensitive instrumentation like gas chromatographs.

Safety is paramount when handling hazardous gases. This regulator includes captured vent ports (1/16" FNPT) on the bonnet, allowing users to pipe vented gases away to a safe discharge area in the unlikely event of a diaphragm failure. The unit is also designed to withstand internal vacuum, facilitating effective purging operations during cylinder changeovers. A 316 stainless steel filtered seat further enhances durability by trapping particulates, while the PCTFE seat material ensures a reliable shut-off. With a maximum inlet pressure rating of 3500 PSI, this regulator is a durable, high-performance solution for critical gas delivery systems.