121-0000 - Miller Smith Silverline 120 Series Two-Stage General Purpose Regulator 0-60 PSI

Precision Pressure Control for General Purpose Applications

The Miller Smith 121-00-00 Silverline Series General Purpose Two Stage Regulator is engineered to deliver unwavering performance in laboratory, plant, and maintenance environments. Designed specifically for the control of inert and non-corrosive gases such as Air, Nitrogen, Carbon Dioxide (CO2), and Argon, this regulator represents a synthesis of durability and precision. The core advantage of this unit lies in its true two-stage architecture. Unlike single-stage regulators that allow delivery pressure to rise as the supply cylinder pressure decays, the 121-00-00 maintains a constant outlet pressure throughout the life of the cylinder. This feature is critical for applications requiring stable flow rates over long periods without manual adjustment.

Constructed from rugged brass bar stock, the body and bonnet are plated to offer superior protection against environmental corrosion and wear. The internal mechanism features a large 1-7/8 inch diaphragm, which provides excellent sensitivity and precise control over the 0-60 PSIG delivery range. This makes it an ideal choice for pneumatic testing, blanketing, or process control where accuracy is paramount. The unit is rated for a maximum inlet pressure of 3500 PSIG, accommodating high-pressure supply sources with ease.

Reliability is further enhanced by Miller Smith's Sure-Seat technology. This filtered seat design prevents microscopic particles and debris from entering the high-pressure seat area, a common cause of regulator failure and creep. By filtering the gas stream, the regulator ensures purity and significantly extends the service life of internal components. The regulator is also designed with versatility in mind; it features 1/4" FNPT inlet and outlet connections, allowing for easy integration into manifolds, custom piping systems, or direct cylinder adapters. The body is tapped for rear panel mounting, facilitating clean and secure installation in instrument panels or test benches.

Safety is addressed via a preset relief valve that vents to the atmosphere, ensuring the downstream system is protected from over-pressurization. Note that due to the atmospheric vent, this regulator is suitable only for non-hazardous gases. Large 2-1/2 inch single-scale gauges provide clear, at-a-glance readings of both inlet and delivery pressures, ensuring operators can monitor system status effectively.