311-00220000 - Miller Smith 310 Series Silverline SS Regulator, 50 PSIG, CGA 330

Technical Overview of the Miller Smith 310 Silverline Series

The Miller Smith 311-00-22-00-00 is a premium single-stage regulator from the 310 Silverline Series, engineered specifically for the rigorous demands of high-purity, corrosive, and toxic gas applications. This unit is meticulously constructed from 316 stainless steel bar stock, ensuring that all wetted parts offer maximum resistance to chemical attack and contamination. The design integrates a 316 stainless steel filtered seat which not only maintains gas stream purity but also significantly extends the service life of the regulator by preventing particulate damage.

Central to its performance is the convoluted stainless steel diaphragm. Unlike flat diaphragms, this convoluted design provides superior sensitivity and stable pressure regulation across the 0-50 PSIG delivery range. The diaphragm utilizes a metal-to-metal seal with the body, a critical feature for maintaining high leak integrity in systems where gas containment is paramount. This metal seal eliminates the outgassing and permeation issues often associated with elastomeric seals, making it suitable for analytical and process applications requiring strict purity standards.

Safety is a primary design consideration for the 311-00-22-00-00. The regulator bonnet includes a captured vent port (1/16" FNPT), allowing operators to pipe hazardous gases away to a safe scrubbing or venting system in the unlikely event of a diaphragm failure. This feature is essential when handling toxic or pyrophoric gases compatible with the CGA 330 connection. The unit is also versatile in installation, featuring a bonnet threaded for front panel mounting and a body tapped for rear panel mounting, facilitating integration into gas cabinets and control panels.

For corrosive applications, the use of PCTFE for the seat material ensures chemical compatibility while maintaining a reliable shut-off. The regulator is rated for a maximum inlet pressure of 3500 PSIG and comes equipped with large, 2-1/2 inch single-scale gauges that provide clear, immediate readouts of cylinder and delivery pressures. This regulator represents the intersection of safety, precision, and durability for specialty gas management.