Victor SR4F-350 High Pressure Piston Regulator, CGA 350, 50-750 PSIG

Precision Testing Regulator for High-Pressure Applications

When your work involves pressure vessel testing or dead-end testing, accuracy and reliability are non-negotiable. The Victor SR4F-350 (0781-1404) High Pressure Piston Regulator is engineered to deliver exactly that. Designed for use with Methane and Hydrogen, this heavy-duty regulator provides a stable delivery pressure range of 50 to 750 PSIG, making it a versatile tool for a variety of testing and industrial applications. Its piston-style actuation is specifically chosen for its ability to handle high-pressure spikes and maintain performance where diaphragm regulators might fail.

The SR4F-350 is built tough with a machined brass body and housing cap, ensuring it can survive the daily wear and tear of a busy shop or field environment. It connects securely to gas cylinders via a CGA 350 inlet and is rated for inlet pressures up to 3000 PSIG. The outlet is outfitted with a professional-grade 1/4" Swagelok connection and a 1/4" stainless tube fitting, providing a robust interface for your hoses or testing equipment. Inside, a cartridge-type seat assembly with a PCTFE seat offers excellent chemical resistance and sealing properties, while a sintered bronze filter keeps the internals clean.

User experience is enhanced by the inclusion of a Delrin cap bushing, which makes pressure adjustments incredibly smooth and precise. This allows technicians to fine-tune output pressure without the "jumpy" feel common in lesser regulators. Safety features include an external adjustable relief valve, which is ventable on hydrogen models to safely manage excess pressure. Whether you are conducting critical leak tests or managing high-pressure gas flows, the Victor SR4F-350 offers the professional performance and safety features required by serious welders and technicians.