221-2008 - Miller Smith Silverline 220 Series High Purity Oxygen Regulator CGA 540

Precision Control for Analytical Applications

The Miller Smith 221-20-08 Silverline High Purity Analytical Two Stage Regulator is engineered to meet the rigorous demands of laboratory and analytical environments. Designed specifically for high purity, non-corrosive pure gases and mixtures, this regulator is an essential component for applications where gas stream integrity and pressure stability are paramount. The Silverline 220 Series distinguishes itself with a robust two-stage design, which effectively eliminates the delivery pressure fluctuations often associated with single-stage regulators as the cylinder pressure decays. This feature ensures that your sensitive instruments receive a constant, unwavering flow of gas from a full cylinder down to a nearly empty one.

Uncompromised Purity and Material Quality

At the heart of the 221-20-08 is a stainless steel diaphragm. Unlike elastomeric diaphragms that can absorb or off-gas impurities, stainless steel provides a non-contaminating surface that preserves the high purity of your carrier gases or calibration mixtures. This makes the regulator ideally suited for gas chromatography applications, including thermal conductivity, flame ionization, flame photometry, and electron capture detectors. The regulator also features a filtered seat, which not only enhances gas stream purity but also extends the service life of the unit by preventing particulate damage.

Rugged Construction and Safety

While designed for delicate analytical work, the physical construction of the regulator is anything but fragile. It is machined from rugged brass bar stock and finished with a high-quality plating on the body, bonnet, and gauges. This plating offers superior protection against environmental corrosion and wear, ensuring the regulator maintains its aesthetic and functional integrity over years of service. Safety is integrated directly into the design with a built-in capturable preset safety relief valve, which protects downstream components from over-pressurization. Additionally, the unit is engineered to withstand vacuums generated during purging operations, a critical feature for maintaining system purity during cylinder changeouts.

Key Specifications

This model comes equipped with a CGA 540 inlet connection, suitable for Oxygen and compatible gas mixtures. It offers a delivery pressure range of 0-50 PSI (with 0-60 PSI gauges), making it versatile for various low-to-medium pressure applications. The large 2-1/2 inch single scale gauges are easy to read, allowing for quick verification of cylinder and delivery pressures.