311-67250000 - Miller Smith Silverline 310 Series High Purity SS Regulator, 50 PSIG, CGA 660

High Purity Pressure Control for Corrosive Environments

The Miller Smith 311-67-25-00-00 Silverline High Purity Regulator is a precision-engineered instrument designed specifically for the rigorous demands of specialty gas delivery. Part of the renowned 310 Silverline Series, this single-stage regulator is constructed to handle corrosive, non-corrosive, and toxic gases with uncompromising safety and accuracy. The unit features a body and diaphragm machined from 316 stainless steel bar stock, ensuring high resistance to chemical attack and maintaining the integrity of the gas stream.

Engineered for critical applications, the regulator utilizes a convoluted stainless steel diaphragm that provides a highly sensitive response to pressure changes, ensuring stable delivery pressure even as the cylinder decays. A key technical advantage of this model is the metal-to-metal diaphragm seal, which eliminates the need for elastomeric seals that can degrade or outgas, thereby providing maximum leak integrity essential for high-purity systems (up to Grade 6.0 gases). The seat assembly is crafted from 316 PCTFE, a material chosen for its dimensional stability and chemical resistance, further protected by a filtered seat design to prevent particulate damage.

Safety is paramount in the design of the 311-67-25-00-00. The bonnet includes a captured vent port (1/16" FNPT), allowing operators to pipe vented gases away to a safe disposal system in the rare event of a diaphragm failure—a critical feature when handling toxic or hazardous media. The regulator is equipped with large, 2-1/2 inch single-scale gauges that provide clear readouts of cylinder and delivery pressure. With a delivery range of 0-50 PSIG and a maximum inlet pressure of 3500 PSIG via a CGA 660 connection, this unit is versatile for various analytical and process applications. It also supports flexible installation options, including front panel mounting via the threaded bonnet or rear panel mounting via tapped body holes.