220-4000 - Miller Smith Silverline 220 High Purity Analytical Regulator 0-15 PSI

Precision Control for Analytical Applications

The Miller Smith 220-40-00 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 ensures that sensitive downstream equipment receives a stable and contaminant-free gas supply. The core of its performance lies in its two-stage design, which reduces cylinder pressure in two steps. This configuration allows for precise control from full to nearly empty cylinders, eliminating the delivery pressure decay often seen in single-stage alternatives. This feature is critical in applications where constant delivery pressures are required regardless of fluctuations in cylinder pressure.

Constructed with a rugged brass bar stock body, the 220 Series is plated on the body, bonnet, and gauges to provide superior protection against environmental corrosion and wear. A key feature for analytical purity is the stainless steel diaphragm. Unlike rubber or neoprene diaphragms that can off-gas or absorb contaminants, the stainless steel interface ensures that the gas stream remains pure, making it ideal for carrier gases or calibration mixtures used in gas chromatography. The unit also features a filtered seat which adds another layer of gas stream purity while extending the service life of the regulator by preventing particulate damage.

Operational safety and ease of use are paramount in the Silverline design. The regulator includes large, 2-1/2 inch single scale gauges that are easy to read at a glance. It is equipped with a built-in capturable preset safety relief valve that protects regulator components from over-pressurization. Furthermore, the design is robust enough to withstand vacuums generated during purging operations, a common procedure in high-purity gas handling. With 1/4" FNPT inlet and outlet connections, this regulator offers versatile connectivity for custom analytical setups.