320-83220000 - Miller Smith 320 Series High Purity Stainless Steel Two-Stage Regulator, CGA 330, 0-25 PSI

Technical Overview of the Miller Smith 320 Series Regulator

The Miller Smith 320-83-22-00-00 is a premium high-purity, two-stage regulator engineered specifically for the precise control of corrosive and non-corrosive gases. Part of the 320 Silverline Series, this regulator is constructed from 316 stainless steel bar stock, ensuring exceptional resistance to corrosion and maintaining gas purity in demanding laboratory and industrial applications. The unit features a CGA 330 inlet connection and provides a delivery pressure range of 0-25 PSIG, making it ideal for applications requiring low-pressure stability.

Advanced Material Construction

The core of the 320 Series is its material integrity. All wetted parts are manufactured from 316 Stainless Steel and PCTFE (Polychlorotrifluoroethylene). The 316 stainless steel filtered seat is designed to trap particulates, preventing seat degradation and extending the service life of the regulator while maintaining gas stream purity. The diaphragm is also constructed from convoluted stainless steel, which provides superior sensitivity and response to pressure changes compared to standard flat diaphragms. This metal-to-metal diaphragm seal ensures maximum leak integrity, a critical requirement when handling hazardous or expensive specialty gases.

Precision Two-Stage Control

As a two-stage regulator, the 320-83-22-00-00 offers constant delivery pressure regardless of fluctuations in the inlet pressure. This is achieved by reducing the cylinder pressure in two steps, eliminating the "decay" effect common in single-stage regulators where outlet pressure rises as the cylinder empties. This feature is essential for analytical applications where pressure stability is paramount.

Safety and Venting

Safety is engineered into the design with captured vent ports located in the bonnet (1/16" FNPT). These ports allow for the safe piping and venting of hazardous gases in the unlikely event of a diaphragm failure. The regulator is also designed to withstand internal vacuums, making it suitable for purging operations. Note that a Cross Purge Assembly is recommended for use with this series to ensure effective purging of hazardous gas traces during cylinder changes.