611-03050000 - Miller Smith 610 Series Silverline High Purity Air Regulator CGA 346

Technical Overview of the Miller Smith 610 Series Regulator

The Miller Smith 611-03-05-00-00 is a premium component within the 610 Series Silverline family, engineered specifically for high-purity gas applications. This single-stage regulator is constructed from brass nickel-plated bar stock, providing a robust housing that resists corrosion while maintaining a high degree of structural integrity. The unit is designed to interface with CGA 346 connections, typically utilized for industrial air or specific specialty gas mixtures, and supports a maximum inlet pressure of 3500 PSI. The delivery pressure range is calibrated for 0-60 PSI, offering precise control for sensitive downstream equipment.

Construction and Purity Features

Central to the performance of this regulator is its stainless steel diaphragm. Unlike elastomeric diaphragms that can outgas or degrade over time, the stainless steel construction ensures that the gas stream remains uncontaminated, preserving the purity of the system. This is further reinforced by a metal-to-metal seal between the body and the diaphragm, eliminating the need for gaskets that could introduce impurities. A 316 stainless steel filter is integrated into the inlet to capture particulates, protecting the seat and ensuring long-term reliability. The seat itself is filtered, adding another layer of defense against debris that could compromise the seal or regulation accuracy.

Safety and Mounting Specifications

Safety and versatility are key design elements of the 611-03-05-00-00. The bonnet features a 1/16-inch FNPT port, allowing for the capture and venting of gases in the unlikely event of a diaphragm failure—a critical feature for handling hazardous or asphyxiating gases in confined spaces. The regulator is also capable of withstanding an internal vacuum, making it suitable for purge cycles often required in high-purity setups. For installation, the unit offers a threaded bonnet for panel mounting and a body tapped for rear panel mounting, providing flexibility for integration into gas cabinets, laboratory benches, or industrial control panels.

Performance Characteristics

The single-stage design provides accurate regulation for non-corrosive gases where inlet pressure decay is not a primary concern or is managed elsewhere. The 2-1/2 inch single scale gauge provides clear visual indication of delivery pressure. With its combination of high-grade materials and precision engineering, this Miller Smith regulator is an essential component for analytical instrumentation, chromatography, and other processes requiring uncompromised gas quality.