623-42050000 - Miller Smith 620 Silverline 2-Stage Air Regulator 0-250 PSI CGA 346

Precision Engineering for High Purity Applications

The Miller Smith 623-42-05-00-00 Silverline High Purity Brass Two Stage Regulator is a premium instrument designed for the rigorous demands of analytical and process applications. As part of the renowned 620 Silverline Series, this regulator is engineered to deliver exceptional pressure stability and gas purity. Unlike standard industrial regulators, the 623 model utilizes a high-purity brass bar stock body that is heavily nickel-plated. This construction not only provides a professional aesthetic but also ensures superior resistance to environmental corrosion and wear. The internal design focuses on minimizing particle generation, making it an ideal choice for systems where downstream contamination must be strictly controlled.

A defining feature of this regulator is its stainless steel diaphragm. By employing a metal-to-metal seal between the body and the diaphragm, Miller Smith eliminates the risk of outgassing and permeability often associated with elastomeric seals. This ensures that the purity of the gas stream is maintained from the cylinder to the application. The two-stage reduction mechanism is critical for precision work; it isolates the delivery pressure from the decaying inlet pressure of the cylinder. This means that as your gas supply is consumed, the output pressure remains rock-steady at your set point (0-250 PSI), eliminating the need for constant manual adjustments.

The unit is equipped with a CGA 346 inlet connection, specifically designated for compressed air service up to 3500 PSI. The outlet features a 1/8" tube fitting paired with a stainless steel needle valve, offering granular control over flow rates directly at the source. Safety and integration are also prioritized, evidenced by the capturable vent in the bonnet (1/16" FNPT), which allows for the safe piping away of vented gases if required. With 2-1/2" single scale gauges providing clear readouts, this regulator is a robust solution for laboratories, testing facilities, and specialized industrial processes requiring reliable pneumatic control.