121-0005 - Miller Smith Silverline 2-Stage Air Regulator | CGA 346 | 0-60 PSI

Precision Control for Inert Gas Applications

The Miller Smith 121-00-05 Silverline Series General Purpose Two Stage Regulator is engineered for applications requiring precise and constant delivery pressure. As a two-stage regulator, it reduces cylinder pressure in two steps, ensuring that the working pressure remains stable even as the cylinder drains. This characteristic makes it superior to single-stage alternatives for tasks where pressure fluctuation could compromise process integrity. The unit is specifically configured with a CGA 346 inlet connection, making it the standard choice for compressed air cylinders, though the regulator body itself is compatible with various inert and non-corrosive gases such as Nitrogen, CO2, and Argon given appropriate fittings.

Robust Construction and Filtration

Durability is a hallmark of the Silverline series. The body is machined from brass bar stock, a manufacturing method that yields a denser, stronger material with less porosity than traditional forged bodies. This rugged construction is complemented by a plated body and bonnet, providing enhanced resistance to corrosion in industrial environments. Internally, the regulator features Miller's Sure-Seat technology. This filtered seat design prevents particulate contamination from entering the high-pressure seat area, significantly extending the service life of the regulator and maintaining gas stream purity. This is particularly critical in laboratory or precision maintenance settings where gas purity is paramount.

Operational Specifications

The 121-00-05 model offers a delivery pressure range of 0-60 PSIG, controlled via a large 1-7/8 inch diaphragm that provides excellent sensitivity. The maximum inlet pressure is rated at 3500 PSIG. Operators can easily monitor system status through the large 2-1/2 inch single-scale gauges. The unit also includes a preset safety relief valve that vents to the atmosphere, reinforcing its designation for non-hazardous gas service only. For installation flexibility, the body is tapped to accommodate rear panel mounting.