323-85250000 - Miller Smith 320 Series High Purity Stainless Steel Regulator, CGA 660, 0-250 PSI

Precision Control for Corrosive Environments

The Miller Smith 323-85-25-00-00 High Purity Two-Stage Regulator is an elite instrument engineered for the rigorous demands of specialty gas delivery. Part of the renowned 320 Silverline Series, this regulator is specifically constructed to handle corrosive and non-corrosive gases where maintaining gas purity is paramount. The body and all wetted parts are machined from 316 Stainless Steel bar stock, ensuring high resistance to chemical attack and minimizing particle generation that could contaminate sensitive downstream instrumentation.

Uncompromised Purity and Integrity

In analytical and high-purity applications, leak integrity is non-negotiable. This regulator features a unique metal-to-metal diaphragm seal, eliminating the need for elastomeric seals that can outgas or degrade over time. The diaphragm itself is a convoluted stainless steel component, designed to provide precise pressure response while maintaining a hermetic seal. Furthermore, the seat is composed of PCTFE and includes a filter to protect the seating surface from particulate damage, thereby extending the service life of the unit and ensuring consistent shut-off performance.

Safety and Stability

Safety is a core design principle of the 323 Series. It includes captured vent ports (1/16" FNPT) on the bonnet, allowing operators to pipe hazardous or toxic gases away to a safe scrubbing or ventilation system in the unlikely event of a diaphragm failure. The two-stage design is essential for applications requiring a constant delivery pressure; it compensates for the drop in cylinder pressure as the gas is consumed, providing a steady 0-250 PSI output without the need for constant manual adjustment. This regulator is also capable of withstanding internal vacuums, making it suitable for purge cycles essential in high-purity gas handling.