623-20020000 - Miller Smith 620 Series High Purity CO2 Regulator, 2-Stage, 0-250 PSI

Precision Control for High Purity Applications

The Miller Smith 623-20-02-00-00 Silverline High Purity Brass Two Stage Regulator is engineered for professionals who demand uncompromising accuracy and gas purity. Part of the renowned 620 Silverline Series, this regulator is specifically designed for non-corrosive specialty gases, such as Carbon Dioxide (CGA 320), where maintaining the integrity of the gas stream is paramount. Unlike standard industrial regulators, the Silverline series features a stainless steel diaphragm. This critical component eliminates the outgassing and absorption issues often associated with elastomeric diaphragms, ensuring that your process gas remains free from cross-contamination.

The regulator utilizes a two-stage design, which is essential for analytical and laboratory environments. In a single-stage regulator, the delivery pressure can drift as the cylinder pressure drops—a phenomenon known as the decaying inlet characteristic. This two-stage unit mitigates that effect, providing a rock-steady 0-250 PSI outlet pressure regardless of fluctuations in the supply cylinder (up to 3500 PSI). This stability is crucial for chromatography, laser resonator gases, and other sensitive instrumentation.

Construction quality is top-tier, featuring a nickel-plated brass bar stock body that offers both durability and a clean, professional aesthetic. The metal-to-metal seal between the body and the diaphragm further enhances leak integrity, capable of withstanding internal vacuums during purging operations. Safety is also addressed with a capturable vent in the bonnet (1/16" FNPT), allowing users to pipe away vented gases if necessary. Equipped with a 1/4" MNPT outlet and a chrome needle valve, this regulator provides precise flow control right out of the box.