220-4206 - Miller Smith 220 Series Silverline High Purity Regulator CGA 350

Precision Control for Analytical Applications

The Miller Smith 220-42-06 Silverline High Purity Analytical Two Stage Regulator is engineered specifically for the rigorous demands of laboratory and analytical environments. Designed to manage high purity, non-corrosive gases and mixtures, this regulator is an essential component for applications where maintaining gas integrity is paramount. The 220 Series Silverline regulators are particularly well-suited for controlling carrier gases or calibration mixtures used in gas chromatography, including thermal conductivity, flame ionization, flame photometry, and electron capture detectors. With a CGA 350 inlet connection, this unit is compatible with a specific range of flammable gas mixtures often found in advanced research settings.

Advanced Two-Stage Design

One of the standout features of the 220-42-06 is its two-stage regulation mechanism. In analytical procedures, fluctuations in delivery pressure can lead to inaccurate results and equipment instability. A single-stage regulator may allow the delivery pressure to rise as the cylinder pressure falls (the decaying cylinder effect). However, this two-stage design compensates for changes in supply pressure, providing a constant and steady delivery pressure from a full cylinder down to a nearly empty one. This stability is critical for long-duration experiments and automated processes where manual adjustment is not feasible.

Superior Materials and Construction

To ensure the highest level of gas purity, Miller Smith has constructed this regulator with a stainless steel diaphragm. Unlike rubber or neoprene diaphragms, stainless steel does not off-gas or absorb impurities, ensuring that the gas stream remains uncontaminated as it passes through the regulator. The seat is also filtered to prevent particulate contamination, which further enhances purity and extends the service life of the internal components. The body, bonnet, and gauges are plated to provide superior protection against environmental corrosion and to maintain a clean, professional appearance suitable for laboratory environments.

Safety and Usability

Safety is built into the core of the 220 Series. The regulator features a built-in capturable preset safety relief valve that protects the regulator components from over-pressurization. Additionally, the unit is designed to withstand vacuums generated during purging operations, a common procedure in high-purity gas handling. The large 2-1/2 inch single scale gauges are easy to read, allowing operators to monitor cylinder and delivery pressure at a glance. The outlet is equipped with a 1/8-inch tube fitting and a stainless steel needle valve, offering precise flow control for delicate analytical instruments.