220-4210 - Miller Smith Silverline 220 Series High Purity Two-Stage Regulator CGA 590

Precision Control for Analytical Applications

The Miller Smith 220-42-10 Silverline High Purity Analytical Two Stage Regulator is engineered for the exacting demands of laboratory and analytical environments. Designed specifically for high purity, non-corrosive gases and mixtures, this regulator is an essential component for applications such as gas chromatography, thermal conductivity, flame ionization, and electron capture. Its primary function is to deliver a constant, precise outlet pressure regardless of fluctuations in the supply cylinder, a critical requirement for maintaining the integrity of sensitive analytical results.

At the heart of the 220 Series is a stainless steel diaphragm that ensures precise control of pressure while maintaining the purity of the gas stream. Unlike elastomeric diaphragms that can outgas or absorb contaminants, the stainless steel construction provides a clean, inert surface compatible with high-purity requirements. The regulator also features a filtered seat, which adds another layer of protection against particulate contamination, thereby extending the service life of the unit and ensuring consistent performance over time.

The two-stage design is particularly beneficial for applications requiring stable delivery pressures from full to nearly empty cylinders. By reducing pressure in two steps, the regulator eliminates the "decay" often seen in single-stage models. The unit is constructed from rugged brass bar stock, which is then plated to protect the body, bonnet, and gauges from corrosion and wear. Large 2-1/2 inch single scale gauges provide clear, easy-to-read pressure monitoring, while the built-in capturable preset safety relief valve offers reliable protection against over-pressurization. This model comes equipped with a CGA 590 inlet and delivers a low-pressure range of 0-15 PSIG, making it ideal for delicate instrumentation.