3000784 - Harris Model 425 Hydrogen Regulator | 0-50 PSIG | CGA 350

Harris Model 425-50A-350 Premium Single-Stage Regulator Overview

The Harris Model 425-50A-350 is a premium, heavy-duty single-stage regulator designed specifically for Hydrogen and Methane gas service. Engineered to meet the rigorous demands of industrial environments, this regulator combines a time-tested design with modern manufacturing precision. The unit features a standard CGA 350 inlet connection, making it compatible with standard hydrogen and methane cylinders, and is calibrated for a delivery pressure range of 0-50 PSIG. This specific pressure range is ideal for applications requiring stable, low-to-medium pressure flow without the fluctuations often seen in lower-quality alternatives.

Construction and Durability

At the core of the Model 425's reliability is its solid brass body and bonnet. Unlike lighter-duty regulators that may utilize alloy or plastic components, the all-brass construction of the 425 series ensures exceptional resistance to corrosion and physical damage. This mass also helps stabilize thermal fluctuations during gas expansion. The regulator is equipped with a neoprene diaphragm, a material chosen for its flexibility and responsiveness. This allows for precise pressure adjustments and consistent flow rates, even as the cylinder pressure decays.

Advanced Seat Technology

One of the most critical features of the Harris 425-50A-350 is its one-piece encapsulated seat design. This assembly includes an internal sintered filter that acts as a barrier against particulate contamination. In many industrial gas systems, microscopic debris can damage the sealing surface, leading to regulator creep or failure. Harris utilizes a PTFE Teflon® seat within this encapsulated module, ensuring a positive seal and long-term reliability. This design not only extends the service life of the regulator but also simplifies maintenance.

Safety and Compliance

Safety is paramount when handling flammable gases like hydrogen. This model includes a tamper-proof, self-reseating internal safety relief valve, providing an essential layer of protection against over-pressurization. The regulator is UL® listed, confirming it meets stringent safety standards. Furthermore, Harris backs this product with an impressive 7-year warranty, underscoring their confidence in the unit's build quality and performance longevity. The 2.5-inch dual-scale brass gauges provide clear, immediate visual confirmation of both cylinder and delivery pressures.