321-00000102 - Miller Smith 320 Series High Purity Two-Stage Stainless Steel Regulator, 0-50 PSI

Miller Smith 321-00-00-01-02 High Purity Stainless Steel Regulator

The Miller Smith 321-00-00-01-02 is a precision-engineered component of the 320 Silverline Series, designed specifically to meet the rigorous demands of high-purity and corrosive gas delivery. This two-stage regulator is built to provide an exceptionally stable delivery pressure of 0-50 PSIG, maintaining accuracy even as the cylinder pressure decays. This characteristic is critical for analytical instrumentation, process control, and laboratory applications where pressure drift can compromise data or process integrity. The unit is rated for a maximum inlet pressure of 3500 PSIG, making it compatible with a wide variety of high-pressure gas sources.

Material selection is central to the performance of this regulator. The body and all wetted parts are machined from 316 stainless steel bar stock, offering excellent resistance to corrosive media that would degrade standard brass components. The seat assembly incorporates a 316 stainless steel filter to protect against particulate contamination, paired with a PCTFE (Polychlorotrifluoroethylene) seat. PCTFE is chosen for its high compressive strength, low deformation under load, and chemical inertness, ensuring a reliable shut-off and extended service life. Furthermore, the regulator utilizes a convoluted stainless steel diaphragm that creates a metal-to-metal seal with the body. This design eliminates the use of elastomeric seals in the gas stream, thereby preventing off-gassing and ensuring the highest levels of gas purity.

Safety and integration capabilities are also key features of the 321-00-00-01-02. The bonnet is equipped with captured vent ports (1/16" FNPT), which allow users to pipe vented gases to a safe disposal area—a mandatory safety protocol when handling toxic or hazardous gases. The regulator is designed to withstand internal vacuums, which is essential for effective purging cycles during cylinder change-outs. For installation flexibility, the unit features 1/4" FNPT inlet and outlet connections, allowing for the attachment of specific CGA fittings or tube fittings as required by the system. Additionally, the front and rear bonnets are threaded to support panel mounting, making this regulator a versatile choice for custom gas management panels and enclosures.