621-83080000 - Miller Smith Silverline 620 Series High Purity 2-Stage Oxygen Regulator, 0-60 PSI

Precision Control for Specialty Gas Applications

The Miller Smith 621-83-08-00-00 Silverline High Purity Brass Two Stage Regulator is an exemplary piece of engineering designed for the rigorous demands of specialty gas delivery. Part of the renowned 620 Silverline Series, this regulator is specifically constructed to handle non-corrosive gases where maintaining gas purity and precise pressure control is paramount. The unit features a robust nickel-plated brass bar stock body, which not only provides exceptional durability but also offers resistance to environmental corrosion. At the heart of its performance is a unique stainless steel diaphragm. Unlike elastomeric diaphragms that can retain a "set" or memory, the stainless steel construction ensures maximum accuracy and provides stable regulation of delivery pressure over the long term. This material choice also eliminates the risk of off-gassing, further preserving the integrity of the gas stream.

Engineered for consistency, the two-stage design of this regulator is critical for applications requiring a constant outlet pressure. As the cylinder pressure decays, single-stage regulators often suffer from a rise in outlet pressure; however, the Miller Smith 621-83-08-00-00 compensates for these inlet fluctuations, delivering a steady 0-60 PSI output regardless of the tank's status. The regulator is equipped with a metal-to-metal body-to-diaphragm seal, a superior sealing method that minimizes leak potential and enhances the overall leak integrity of the system. For added gas stream purity, the seat is filtered, and a 316 stainless steel filter is integrated to trap particulates.

Safety and versatility are also key components of the design. The bonnet features capturable vent ports (1/16" FNPT) for both stages, allowing for the safe piping away of gases in the unlikely event of a diaphragm failure. This feature is particularly important in laboratory or enclosed environments. Additionally, the regulator is capable of withstanding internal vacuums during purging operations, making it suitable for high-purity setups that require evacuation prior to use. With a maximum inlet pressure of 3500 PSI and a CGA 540 connection, this regulator is the professional's choice for oxygen and other compatible non-corrosive gas services.