620-00030000 - Miller Smith 620 Series Silverline High Purity Regulator, CGA 326, 0-30 PSI

Precision Control for Specialty Gases

The Miller Smith 620 Series Silverline High Purity Brass Two-Stage Regulator is engineered for applications demanding the utmost precision and gas purity. Designed specifically for non-corrosive specialty gases, this regulator exemplifies superior craftsmanship with its nickel-plated brass bar stock body and advanced internal components. The unit features a CGA 326 inlet connection, typically utilized for Nitrous Oxide service, ensuring compatibility with standard high-purity gas cylinders. At the heart of this regulator is a unique stainless steel diaphragm. Unlike elastomeric diaphragms that can absorb or release contaminants, the stainless steel construction ensures a metal-to-metal seal with the body, preserving the integrity of the gas stream and providing exceptional sensitivity to pressure changes.

Stability is paramount in high-purity applications, and the two-stage design of the 620 Series delivers constant outlet pressure regardless of fluctuations in the inlet supply. As the cylinder pressure decays, single-stage regulators often experience a rise in outlet pressure; however, the Miller Smith two-stage mechanism compensates for this, maintaining a steady 0-30 PSIG delivery. This makes it an ideal choice for laboratory instrumentation, gas chromatography, and other sensitive analytical processes. Additionally, the regulator is designed to withstand internal vacuums, allowing for effective purging operations without damaging the internal mechanism. The inclusion of a filtered seat further enhances reliability by trapping particulates that could otherwise compromise the seal.

Safety and versatility are built into the design. The regulator includes captured vent ports (1/16" FNPT) on the bonnet, allowing users to pipe hazardous or displaced gases away from the work area in the unlikely event of a diaphragm failure. The 2-1/2 inch single scale gauge provides clear, easy-to-read pressure monitoring. With a maximum inlet pressure rating of 3500 PSIG and a delivery range extending from 30" Hg vacuum to 30 PSIG, this regulator offers the flexibility required for sophisticated gas delivery systems. The 1/4" FNPT outlet connection allows for seamless integration into existing piping or tubing setups.