223-0309 - Miller Smith Silverline 220 Series High Purity Two-Stage Regulator, CGA 580, 150 PSI

Precision Control for Analytical Instrumentation

The Miller Smith 223-03-09 Silverline High Purity Analytical Two-Stage Regulator is engineered specifically for the rigorous demands of laboratory and analytical applications. Designed to manage non-corrosive pure gases and mixtures, this regulator excels in environments where maintaining gas purity and constant delivery pressure is critical. It is particularly well-suited for controlling carrier gases or calibration mixtures used in gas chromatography techniques, including thermal conductivity, flame ionization, flame photometry, and electron capture.

At the core of the 223-03-09 is a stainless steel diaphragm. Unlike elastomeric diaphragms that can off-gas or absorb impurities, the stainless steel construction ensures that the gas stream remains uncontaminated, preserving the integrity of sensitive analytical results. The regulator features a filtered seat which further enhances gas purity by trapping particulates before they enter the seating area, simultaneously extending the service life of the unit by preventing seat damage.

The two-stage design is essential for applications requiring unwavering stability. As a high-pressure cylinder empties, the inlet pressure drops significantly. A single-stage regulator would allow the delivery pressure to rise (decay) as the cylinder pressure falls. The Miller Smith 220 Series utilizes a two-stage reduction mechanism to compensate for these fluctuations, delivering a steady 0-150 PSI output from a full 3500 PSI cylinder down to near-empty conditions. This eliminates the need for constant manual adjustments during long operational cycles.

Constructed from rugged brass bar stock, the body, bonnet, and gauges are fully plated to offer superior protection against environmental corrosion and wear. The large 2-1/2 inch single-scale gauges provide clear, immediate readouts of both cylinder and delivery pressures. Safety is paramount in high-pressure environments; thus, the unit includes a built-in capturable preset safety relief valve to protect downstream components from over-pressurization. Additionally, the design is robust enough to withstand vacuums generated during purging operations, making it a versatile tool for complex gas management systems.