310-70250000 - Miller Smith 310 Silverline Stainless Steel Regulator, CGA 660, 0-25 PSIG

Technical Overview of the Miller Smith 310 Series Silverline Regulator

The Miller Smith 310-70-25-00-00 is a premium single-stage regulator engineered specifically for high purity and corrosive gas applications. Part of the renowned Silverline series, this regulator is constructed to meet the rigorous demands of laboratory, analytical, and industrial specialty gas environments. The core of its design features a body and wetted parts machined from 316 stainless steel bar stock. This material selection is critical for preventing contamination in high purity systems and ensuring longevity when exposed to corrosive media such as those typically associated with CGA 660 connections.

Precision pressure control is achieved through a specially designed convoluted stainless steel diaphragm. Unlike flat diaphragms, the convoluted shape provides greater sensitivity to pressure changes, allowing for accurate regulation of the delivery pressure within the 0-25 PSIG range. The diaphragm employs a metal-to-metal seal with the body, a design choice that significantly enhances leak integrity compared to elastomeric seals, which can degrade or outgas over time. This metal-to-metal seal is essential for maintaining the purity of the gas stream and preventing atmospheric contamination.

For applications involving toxic or hazardous gases, safety is paramount. The 310 Series addresses this with a captured vent port located in the bonnet, threaded with a 1/16-inch FNPT connection. This allows operators to pipe vented gases away to a safe disposal system in the rare event of a diaphragm failure. Furthermore, the regulator utilizes 316 PCTFE (Polychlorotrifluoroethylene) seats. PCTFE is chosen for its excellent chemical resistance and mechanical stability, ensuring a reliable shut-off even in corrosive service. The regulator is also designed to withstand internal vacuum, making it compatible with purge cycles necessary for maintaining system purity during cylinder changes.

Installation flexibility is provided through panel mounting options; the bonnet is threaded for front panel mounting, and the body is tapped for rear panel mounting. The unit includes large, easy-to-read 2-1/2 inch gauges that allow for quick visual monitoring of both inlet and delivery pressures. With a maximum inlet pressure rating of 3500 PSIG, this regulator is a robust solution for critical gas delivery systems requiring uncompromised purity and safety.