621-83100000 - Miller Smith 620 Series Silverline High Purity 2-Stage Regulator CGA 590

Precision Specialty Gas Control with Miller Smith

The Miller Smith 621-83-10-00-00 Silverline High Purity Brass Two Stage Regulator is engineered for professionals who demand exacting standards in gas delivery. Part of the renowned 620 Silverline series, this regulator is specifically designed for non-corrosive specialty gases where maintaining gas purity and precise pressure control is paramount. The unit features a CGA 590 connection, making it suitable for gases such as Sulfur Hexafluoride (SF6) and Industrial Air, commonly used in laboratory, research, and high-tech industrial applications.

Uncompromised Purity and Design

At the heart of this regulator is a unique, specially designed stainless steel diaphragm. Unlike elastomeric diaphragms that can outgas or degrade over time, the stainless steel construction ensures maximum accuracy and maintains the integrity of the gas stream. This is complemented by a metal-to-metal body-to-diaphragm seal, which eliminates the need for O-rings that could potentially introduce contaminants. Further enhancing purity, the regulator includes a filtered seat and a 316 stainless steel filter, providing robust protection against particulate contamination that could compromise sensitive downstream equipment.

Stable Two-Stage Performance

Stability is critical in specialty gas applications, and the two-stage design of the 621-83-10-00-00 excels in this regard. By reducing pressure in two steps, the regulator provides a constant outlet pressure regardless of fluctuations in the inlet pressure as the cylinder drains. This "decaying inlet characteristic" compensation is essential for long-duration processes where operator intervention to adjust pressure is undesirable. The regulator offers a delivery range of 0-60 PSI, monitored via a clear 2-1/2" single scale gauge.

Safety and Versatility

Safety is built into the design with capturable vent ports (1/16" FNPT) in the bonnet. This feature allows for the safe piping away of gases in the unlikely event of a diaphragm failure, a critical requirement when handling potentially hazardous media. The body is machined from brass bar stock and nickel-plated for superior durability and diffusion resistance. Additionally, the regulator is capable of withstanding internal vacuums, making it suitable for purge cycles. Threaded front and rear bonnets facilitate easy panel mounting, offering flexibility in system integration.