120-4109 - Miller Smith Silverline 2-Stage Inert Gas Regulator 0-15 PSI CGA 580 with Needle Valve

Precision Control for Inert Gas Applications

The Miller Smith 120-41-09 Silverline Series General Purpose Two Stage Regulator is engineered to deliver exceptional performance in laboratory, industrial, and maintenance environments. Designed specifically for inert and non-corrosive gases such as Air, Nitrogen, Carbon Dioxide (CO2), and Argon, this regulator ensures gas stream purity and operational safety. The unit features a CGA 580 inlet connection, making it compatible with standard inert gas cylinders, and offers a precise delivery pressure range of 0-15 PSIG. This low-pressure capability is critical for applications requiring fine control and stability.

Advanced Two-Stage Design

At the core of the 120-41-09 is its two-stage regulation mechanism. Unlike single-stage counterparts, this regulator reduces cylinder pressure in two steps, maintaining a constant delivery pressure even as the inlet pressure drops during cylinder depletion. This feature eliminates the need for frequent manual adjustments, ensuring process consistency and reliability. The large 1-7/8 inch diaphragm further enhances sensitivity, allowing for accurate pressure maintenance across the entire delivery range.

Durability and Construction

Constructed from rugged brass bar stock, the body of the regulator is built to withstand the rigors of daily use. The entire assembly, including the bonnet and gauges, is chrome-plated to provide superior protection against corrosion and wear. The regulator incorporates Miller's proprietary Sure-Seat technology, which utilizes a filtered seat to prevent debris from entering the high-pressure seat area. This innovation significantly extends the service life of the regulator and maintains the integrity of the gas stream.

User-Centric Features

The 120-41-09 is equipped with large, 2-1/2 inch single-scale gauges that are easy to read, allowing operators to monitor cylinder and delivery pressure at a glance. The outlet is fitted with a 1/8 inch tube brass needle valve, providing an additional layer of flow control for precise applications. The body is also tapped for rear panel mounting, offering versatile installation options for fixed systems or test benches. Please note that the preset safety relief valve vents to the atmosphere, making this unit suitable only for non-hazardous gases.