623-00000100 - Miller Smith 623 Series Silverline High Purity Two-Stage Regulator, 250 PSI, 1/4" FNPT

Precision Control for Analytical Applications

The Miller Smith 623-00-00-01-00 Silverline High Purity Brass Two Stage Regulator is a premium instrument engineered for the rigorous demands of analytical laboratories and specialty gas applications. Designed specifically for non-corrosive gases, this regulator prioritizes gas stream integrity and pressure stability. At its core is a specially designed 316 stainless steel diaphragm that forms a metal-to-metal seal with the nickel-plated brass bar stock body. This construction eliminates the use of elastomeric seals in the gas path, effectively preventing the outgassing and permeation that can compromise high-purity gas standards. The result is a regulator that maintains the chemical composition of your gas from the cylinder to the point of use, essential for chromatography, EPA protocol gases, and laser systems.

Two-Stage Performance and Stability

Stability is the hallmark of the 623 Series. As a two-stage regulator, it reduces cylinder pressure in two distinct steps, ensuring that the final delivery pressure remains constant even as the inlet pressure drops significantly during tank depletion. This feature is critical for long-duration processes where pressure drift could ruin an experiment or production run. The unit supports a maximum inlet pressure of 3,500 PSI and offers a precise delivery range of 0-250 PSI. A filtered seat is integrated into the design to trap particulates, further protecting the seat assembly and ensuring a long service life under demanding conditions.

Versatile Connectivity and Safety

Flexibility in installation is provided by the 1/4" FNPT inlet and outlet ports, allowing users to configure the regulator with specific fittings suited to their unique piping or manifold requirements. Safety has also been engineered into the bonnet design, which features a capturable vent (1/16" FNPT). This allows for the safe piping away of vented gases in the rare event of a diaphragm failure, a crucial feature when handling potentially hazardous or asphyxiating gases. Additionally, the regulator is built to withstand internal vacuums, making it suitable for purge cycles without risking diaphragm damage or seal integrity.