621-00080000 - Miller Smith Silverline 620 Series High Purity Oxygen Regulator, 2-Stage, CGA 540

Precision Control for High Purity Applications

The Miller Smith 621-00-08-00-00 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 gases, such as high-purity oxygen, where maintaining the integrity of the gas stream is paramount. The unit features a robust nickel-plated brass bar stock body, which not only provides a durable exterior but also ensures a diffusion-resistant barrier suitable for analytical and laboratory environments.

Advanced Diaphragm Technology

At the heart of this regulator is a specially designed stainless steel diaphragm. Unlike elastomeric diaphragms that can absorb and release contaminants (off-gassing), the stainless steel construction ensures zero contamination of the gas stream. This metal-to-metal seal between the body and the diaphragm eliminates the need for gaskets that could degrade over time, providing a superior leak-tight seal. This feature is essential for applications involving gas chromatography, emission monitoring systems, and research instrumentation where even trace impurities can compromise results.

Stable Two-Stage Performance

The two-stage design of the 621-00-08-00-00 provides a distinct advantage in pressure control. By reducing the cylinder pressure in two steps, the regulator delivers a constant outlet pressure regardless of fluctuations in the inlet pressure. As the gas cylinder empties and pressure drops, single-stage regulators typically experience a rise in delivery pressure; the Silverline 620 eliminates this variable, ensuring your downstream equipment receives a steady 0-50 PSIG flow without the need for constant manual adjustment.

Safety and Versatility

Safety is integrated into every aspect of the design. The regulator includes captured 1/16" FNPT vent ports on the bonnet, allowing users to pipe vented gases away safely in the event of a diaphragm failure—a critical feature for enclosed environments. Additionally, the regulator is capable of withstanding internal vacuums, making it suitable for purge cycles often required in high-purity systems. With threaded front and rear bonnets, this unit is also ready for panel mounting, offering flexibility for custom system integrations.