123-0008 - Miller Smith Silverline 2-Stage Oxygen Regulator, CGA 540, 250 PSI Delivery

Technical Overview of the Miller Smith 123-00-08

The Miller Smith 123-00-08 is a premium component within the Silverline 120 Series, engineered for general purpose applications requiring precise and constant delivery pressure. As a two-stage regulator, it performs pressure reduction in two steps: first reducing the high-pressure inlet gas to an intermediate pressure, and then regulating it down to the final delivery pressure. This mechanical configuration provides a distinct advantage over single-stage counterparts by maintaining a steady outlet pressure (decay compensation) even as the supply cylinder's internal pressure drops during consumption.

Constructed from rugged brass bar stock, the body and bonnet are designed to withstand the rigors of industrial environments while maintaining the cleanliness required for laboratory settings. The unit features a CGA 540 inlet connection, designating it for Oxygen service, and is rated for a maximum inlet pressure of 3500 PSI. The delivery pressure is adjustable up to 250 PSI, controlled via a large 1-7/8 inch diaphragm that offers superior sensitivity and response to flow changes. The outlet is configured with a 1/4" FNPT connection, allowing for flexible integration into manifolds, hard piping, or custom hose assemblies.

Internally, the regulator utilizes Miller's Sure-Seat technology, which includes a filtered seat design. This filtration system is critical for preventing debris and particulate matter from damaging the seating surface, thereby ensuring gas stream purity and extending the operational life of the regulator. A preset safety relief valve is integrated into the design to vent excess pressure to the atmosphere in the event of a malfunction, adding a layer of safety for personnel and equipment.