221-4010 - Miller Smith Silverline 220 Series High Purity Two-Stage Regulator, CGA 590, 0-60 PSI

Precision Control for Analytical Applications

The Miller Smith 221-40-10 Silverline High Purity Analytical Two-Stage Regulator is engineered specifically for the rigorous demands of laboratory and analytical environments. When working with carrier gases or calibration mixtures for gas chromatography—such as thermal conductivity, flame ionization, flame photometry, and electron capture—purity and stability are paramount. This regulator delivers on both fronts by utilizing a stainless steel diaphragm that prevents contamination of the gas stream while offering exceptional sensitivity to pressure adjustments. The filtered seat design further enhances purity by trapping particulates that could otherwise compromise sensitive downstream equipment or the regulator's own internal components.

Consistent Delivery Pressure

One of the primary challenges in managing gas supply from high-pressure cylinders is the fluctuation in delivery pressure as the cylinder empties. The 221-40-10 utilizes a sophisticated two-stage design that effectively eliminates this issue. By reducing pressure in two steps, the regulator maintains a constant delivery pressure of 0-60 PSIG regardless of the decaying inlet pressure from the cylinder. This feature is critical for long-duration analytical runs where pressure drift could invalidate results. The unit is rated for a maximum inlet pressure of 3500 PSIG, making it compatible with a wide range of high-pressure specialty gas cylinders equipped with a CGA 590 connection.

Rugged and Reliable Construction

While designed for delicate analytical tasks, the Silverline 220 Series is built to withstand the physical demands of industrial handling. The body and bonnet are machined from rugged brass bar stock and then plated for superior protection against corrosion and wear. This plating also helps maintain a clean exterior suitable for lab environments. The regulator features large, 2-1/2 inch single-scale gauges that are easy to read at a glance, ensuring operators can monitor cylinder and delivery pressures accurately. Safety is integrated into the design with a built-in capturable preset safety relief valve that protects components from over-pressurization, and the assembly is robust enough to withstand vacuums generated during purging operations.