0781-1424 - Victor SR4G-350 Methane/Hydrogen Piston Regulator 100-1500 PSIG

Victor SR4G-350 High Pressure Piston Regulator Overview

The Victor SR4G-350 (0781-1424) is a premium heavy-duty high-pressure regulator specifically engineered for Methane and Hydrogen gas applications. Part of the renowned SR 4 Series, this regulator is designed to handle the rigorous demands of industrial environments, offering a substantial delivery pressure range of 100 to 1500 PSIG. Unlike standard diaphragm regulators, the SR4G-350 utilizes a robust piston-type actuation mechanism. This brass piston design is superior for high-pressure applications, providing durability and resistance to the wear and tear often associated with pressure vessel and dead-end testing.

Construction and Durability

Built to last, the regulator features a machined brass body and housing cap, ensuring structural integrity under high inlet pressures up to 3000 PSIG. The internal components are equally robust, featuring a cartridge-type seat assembly with a PCTFE seat. PCTFE (Polychlorotrifluoroethylene) is chosen for its excellent chemical resistance and mechanical strength, making it ideal for handling high-pressure gases like Hydrogen and Methane without degradation. A sintered bronze inlet filter is integrated into the design to trap particulates and debris, preventing damage to the seat and piston, thereby extending the operational lifespan of the unit.

Precision and Usability

Despite its heavy-duty nature, the SR4G-350 offers smooth and precise adjustments thanks to the inclusion of a Delrin cap bushing. This feature reduces friction during adjustment, allowing operators to dial in the exact pressure required for their specific testing or process application. The unit is equipped with large, easy-to-read 2.5-inch brass gauges that display cylinder and delivery pressures clearly. The outlet is fitted with a 1/4" Swagelok connection including a 1/4" stainless tube fitting, facilitating secure and leak-free integration into high-pressure tubing systems.

Safety and Compliance

Safety is paramount when handling flammable gases like Hydrogen and Methane. The SR4G-350 is equipped with an external adjustable relief valve, providing an essential safety mechanism to prevent over-pressurization. The regulator connects via a standard CGA 350 inlet, ensuring proper mating with Methane and Hydrogen cylinders and preventing accidental connection to incompatible gas sources. This regulator is an essential tool for professionals requiring reliable high-pressure delivery for testing and industrial processes.