321-85220000 - Miller Smith 320 Series High Purity Stainless Steel Two-Stage Regulator, CGA 330, 0-50 PSI

Technical Overview

The Miller Smith 321-85-22-00-00 is a premium component of the 320 Silverline Series, engineered specifically for the regulation of high purity, corrosive, and non-corrosive gases. This two-stage regulator is constructed with a 316 stainless steel bar stock body, ensuring exceptional resistance to chemical attack and maintaining the integrity of the gas stream. The unit features a 316 stainless steel filtered seat and a convoluted stainless steel diaphragm, which work in tandem to provide precise pressure control and extended service life.

Technically, the regulator is designed to handle a maximum inlet pressure of 3500 PSIG and delivers a consistent output range of 0-50 PSIG. The two-stage mechanism compensates for the drop in cylinder pressure, providing a steady flow rate without the need for constant adjustment. A critical feature for hazardous environments is the metal-to-metal diaphragm seal, which maximizes leak integrity. Additionally, the bonnet includes a captured vent port (1/16" FNPT), allowing for the safe piping and venting of hazardous gases in the unlikely event of a diaphragm failure. The device is equipped with CGA 330 connections, suitable for specific corrosive gas applications.

Specifications and Compliance

The regulator is designed to withstand internal vacuums, making it suitable for rigorous purging operations essential in high-purity applications. Wetted parts consist exclusively of 316 Stainless Steel and PCTFE. It is recommended that a Cross Purge Assembly be utilized with this series to ensure effective removal of hazardous gas traces during cylinder changes. The unit is front panel mountable via threaded front and rear bonnets.