323-00310000 - Miller Smith 320 Series High Purity SS Two-Stage Regulator, CGA 705, 250 PSI

High Purity Precision for Corrosive Environments

The Miller Smith 323-00-31-00-00 is a premium component of the 320 Silverline Series, engineered specifically for the control of corrosive and non-corrosive gases in high-purity applications. Constructed from 316 stainless steel bar stock, this two-stage regulator is designed to deliver uncompromised performance in analytical laboratories, semiconductor manufacturing, and chemical processing environments where gas purity and equipment longevity are paramount. The unit features a CGA 705 inlet connection, making it suitable for specific corrosive gas services such as ammonia and amines, provided proper safety protocols are followed.

Advanced Material Construction

At the core of this regulator is a convoluted stainless steel diaphragm that provides exceptional sensitivity and precise pressure control. Unlike elastomeric diaphragms that can degrade or outgas, the stainless steel diaphragm utilizes a metal-to-metal seal, ensuring maximum leak integrity—a critical feature when handling hazardous media. The wetted parts, including the body and filtered seat, are manufactured from 316 Stainless Steel and PCTFE, offering robust resistance to corrosion and ensuring that the gas stream remains uncontaminated by the regulator itself.

Stable Two-Stage Performance

As a two-stage regulator, the 323-00-31-00-00 reduces cylinder pressure in two steps, resulting in a constant delivery pressure regardless of fluctuations in the inlet pressure. This is essential for applications requiring a steady flow rate as the supply cylinder empties. The regulator is rated for a maximum inlet pressure of 3500 PSIG and provides a delivery pressure range of 0-250 PSIG, monitored via large, easy-to-read 2-1/2 inch single scale gauges.

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. Additionally, the regulator is designed to withstand internal vacuums, facilitating effective purging operations. Note that a Cross Purge Assembly is highly recommended for use with this series to ensure the safe removal of hazardous gas traces during cylinder changes.