623-40030000 - Miller Smith Silverline 620 Series High Purity 2-Stage Regulator, CGA 326, 0-250 PSI

Precision High Purity Gas Control

The Miller Smith 623-40-03-00-00 Silverline High Purity Brass Two Stage Regulator is engineered for applications demanding the utmost stability and cleanliness in gas delivery. Designed specifically for non-corrosive specialty gases, this regulator features a CGA 326 connection, typically utilized for Nitrous Oxide service. The core of the 620 Series is its advanced two-stage reduction mechanism, which maintains a constant outlet pressure of 0-250 PSIG regardless of fluctuations in the inlet pressure as the supply cylinder is depleted. This "set it and forget it" capability is critical for analytical instrumentation and laboratory processes where pressure drift cannot be tolerated.

Construction quality is paramount in the Silverline series. The body is machined from brass bar stock and finished with nickel plating, providing a robust, diffusion-resistant barrier that maintains the purity of the gas stream. Unlike standard industrial regulators, this unit employs a stainless steel diaphragm. This material choice eliminates the outgassing associated with elastomeric diaphragms and provides a metal-to-metal seal against the body, ensuring superior leak integrity. The diaphragm is specially designed to offer maximum sensitivity and accuracy, translating to precise pressure control at the outlet.

Safety and longevity are also key features. The regulator includes a filtered seat that protects the critical sealing surfaces from particulate contamination, significantly extending the service life of the unit. For safety in enclosed environments or when handling specific gases, the bonnet features a capturable vent (1/16" FNPT), allowing for the piping away of vented gases in the unlikely event of a diaphragm failure. The unit comes equipped with a 1/4" FNPT outlet and a needle valve for fine flow control, making it a versatile solution for sophisticated gas delivery systems.