122-2005 - Miller Smith Silverline 2-Stage Air Regulator, 0-100 PSI, CGA 346

Precision Pressure Control for Industrial Air Applications

The Miller Smith 122-20-05 Silverline Series General Purpose Two-Stage Regulator is engineered for professionals who demand consistent performance and durability. As part of the renowned Silverline 120 Series, this regulator is designed to handle inert and non-corrosive gases, specifically configured here with a CGA 346 inlet connection for Industrial Air. The defining characteristic of this unit is its two-stage regulation mechanism. Unlike single-stage counterparts that allow delivery pressure to rise as the cylinder pressure falls (a phenomenon known as the decaying inlet characteristic), this two-stage regulator drops the pressure in two steps. This ensures that the output pressure remains constant at your set point of 0-100 PSI throughout the entire life of the cylinder, providing stable flow for critical laboratory, plant, and maintenance applications.

Construction quality is paramount in the 122-20-05. The body is machined from rugged brass bar stock, offering superior strength compared to forged or die-cast alternatives. To further enhance durability and aesthetics, the body, bonnet, and gauges feature a plated finish that resists corrosion and wear. Internally, the regulator utilizes Miller's proprietary Sure-Seat technology. This filtered seat design prevents debris from entering the seating area, significantly reducing the risk of seat failure and gas contamination. The large 1-7/8 inch diaphragm allows for high sensitivity and precise pressure adjustments, while the 2-1/2 inch single-scale gauges provide clear, easy-to-read metrics for both cylinder and delivery pressure.

This model comes equipped with a 1/4 inch MNPT needle valve on the outlet, allowing for fine-tuned flow control directly at the regulator. The body is also tapped for rear panel mounting, making it a versatile choice for fixed installations in gas manifolds or test benches. With a maximum inlet pressure rating of 3500 PSI, it is robust enough to handle high-pressure supply cylinders safely. Whether used for pneumatic testing, instrument calibration, or general shop air supply, the Miller Smith 122-20-05 delivers the reliability and precision required for industrial MRO tasks.