221-0302 - Miller Smith 220 Silverline High Purity CO2 Regulator, Two Stage, CGA 320

High Purity Analytical Precision

The Miller Smith 221-03-02 Silverline High Purity Analytical Two Stage Regulator is engineered for applications demanding the highest levels of precision and gas purity. Part of the renowned 220 Silverline Series, this regulator is specifically designed to manage non-corrosive pure gases and mixtures, making it an essential component for gas chromatography setups including thermal conductivity, flame ionization, flame photometry, and electron capture detectors. The unit features a CGA 320 inlet connection, typically utilized for Carbon Dioxide (CO2) service in laboratory environments.

Advanced Construction and Materials

To ensure the integrity of the gas stream, the 221-03-02 is constructed with a stainless steel diaphragm. Unlike elastomeric diaphragms, stainless steel prevents off-gassing and absorption, ensuring that the gas delivered remains as pure as the source. The regulator body, bonnet, and gauges are plated to provide superior protection against environmental corrosion and to maintain a clean, professional appearance suitable for lab settings. A filtered seat is integrated into the design to trap particulates, extending the service life of the regulator and further protecting downstream instrumentation.

Two-Stage Regulation Technology

This model utilizes a two-stage regulation mechanism. The first stage reduces the high-pressure inlet gas to an intermediate pressure, while the second stage reduces it to the final delivery pressure (0-50 PSIG). This configuration allows for precise control from full to nearly empty cylinders, eliminating the "decay" effect seen in single-stage regulators where delivery pressure rises as cylinder pressure falls. This stability is critical for analytical procedures where flow rate consistency directly impacts results.

Safety and Specifications

Safety is paramount in high-pressure gas handling. The Miller Smith 221-03-02 includes a built-in capturable preset safety relief valve that protects regulator components from over-pressurization. The unit is rated for a maximum inlet pressure of 3500 PSIG and is capable of withstanding vacuums generated during purging operations, a common requirement in high-purity gas delivery systems. The large 2-1/2 inch single scale gauges provide clear, easy-to-read pressure monitoring.