122-0000 - Miller Smith Silverline 120 Series General Purpose Two-Stage Regulator, 0-100 PSI, 1/4" FNPT

Precision Control for Industrial and Laboratory Gas Systems

The Miller Smith 122-00-00 Silverline Series General Purpose Two-Stage Regulator is engineered for applications demanding consistent delivery pressure and high reliability. Unlike single-stage counterparts that exhibit a "decay" or rise in outlet pressure as the supply cylinder empties, this two-stage device reduces pressure in two steps. This mechanical advantage ensures that the working pressure remains stable throughout the life of the gas supply, making it an ideal choice for laboratory instrumentation, precise pneumatic testing, and critical maintenance shop applications.

Constructed from rugged brass bar stock, the body and bonnet are plated to resist corrosion and withstand the rigors of industrial environments. The regulator features a large 1-7/8 inch diaphragm which provides exceptional sensitivity, allowing for fine-tuning of delivery pressures between 0 and 100 PSIG. The unit is rated for a maximum inlet pressure of 3500 PSIG, accommodating high-pressure cylinders and manifold systems. A key feature of the Silverline series is the Sure-Seat™ technology, which incorporates a filtered seat to protect the internal mechanism from debris and particulate contamination, significantly extending the service life of the regulator.

This specific model, the 122-00-00, is distinct in its connectivity. It is equipped with 1/4" FNPT (Female National Pipe Thread) connections for both the inlet and outlet. This configuration offers maximum versatility for systems integrators, allowing the regulator to be installed directly into hard-piped lines, panel mounts (body is tapped for rear mounting), or fitted with specific CGA nipples and nuts depending on the gas service required. It is approved for use with inert and non-corrosive gases including Air, Nitrogen, CO2, and Argon. Safety is paramount, with a preset relief valve that vents to the atmosphere, ensuring the downstream system is protected from over-pressurization.