620-42090000 - Miller Smith 620 Series High Purity 2-Stage Regulator, CGA 580, 0-25 PSI

Precision Control for High Purity Applications

The Miller Smith 620 Series Silverline High Purity Brass Two Stage Regulator is engineered for analytical and process applications where gas purity and pressure stability are paramount. Designed specifically for non-corrosive specialty gases, this regulator features a nickel-plated brass bar stock body that provides a robust, diffusion-resistant barrier against external contaminants. Unlike standard industrial regulators, the 620 Series utilizes a 316 stainless steel diaphragm, ensuring that the gas stream remains unadulterated by elastomeric outgassing or absorption. The metal-to-metal seal between the body and diaphragm further enhances the integrity of the system, making it an ideal choice for gas chromatography, laser gas systems, and emission monitoring.

Stable Delivery Pressure

One of the critical challenges in precision gas delivery is the 'decay' effect, where outlet pressure rises as the cylinder pressure falls. The Miller Smith 620 overcomes this with a sophisticated two-stage design. The first stage reduces the high inlet pressure (up to 3500 PSIG) to an intermediate level, while the second stage regulates it down to the precise delivery pressure required—in this case, a low-pressure range of 0-25 PSIG. This configuration ensures that the outlet pressure remains constant throughout the life of the cylinder, providing reliable performance for sensitive instrumentation.

Safety and Versatility

Safety is integrated into every aspect of the design. The regulator includes a capturable vent in the bonnet (1/16" FNPT), allowing for the safe piping away of gases in the unlikely event of a diaphragm failure. This model is equipped with a CGA 580 inlet connection, making it compatible with inert gases such as Nitrogen, Argon, and Helium. The outlet is fitted with a high-quality 1/8" tube stainless steel needle valve, offering operators precise flow control directly at the source. Whether for laboratory research or industrial process control, the Miller Smith 620 Series delivers the accuracy and purity required for critical operations.