0781-1456 - Victor SR4MJ-997 Heavy Duty High Pressure Inert Gas Regulator

Technical Overview of the Victor SR4MJ-997 High Pressure Regulator

The Victor 0781-1456, model SR4MJ-997, is a heavy-duty single-stage regulator engineered specifically for high-pressure manifold applications and rigorous testing environments. Unlike standard regulators that utilize a diaphragm mechanism, this unit features a robust piston-type actuation system. Piston regulators are generally preferred in high-pressure scenarios because they are less susceptible to damage from pressure spikes and offer greater durability over time. The entire body and housing cap are constructed from machined brass, providing excellent structural integrity and resistance to industrial wear and tear.

Designed for inert gas service, this regulator is equipped with a CGA-997 inlet connection. It offers a substantial delivery pressure range of 200 to 3000 PSIG, making it an ideal choice for pressure vessel testing, dead-end testing, and other applications requiring high delivery pressures. The internal mechanism includes a cartridge-type seat assembly featuring a PCTFE (Polychlorotrifluoroethylene) seat. PCTFE is chosen for its high compressive strength, low deformation under load, and excellent chemical resistance, ensuring a reliable seal even under the high-pressure conditions this regulator is designed to manage.

Operational precision is enhanced by a Delrin cap bushing, which facilitates smooth adjustments of the delivery pressure. The unit is also equipped with large, 2.5-inch brass gauges that allow operators to easily monitor both inlet and delivery pressures. To further extend the lifespan of the regulator, a sintered bronze inlet filter is integrated into the design to trap particulates and prevent debris from damaging the seat or piston assembly. This regulator represents the heavy-duty division of Victor's gas equipment line, ensuring professional-grade performance for critical industrial tasks.

Key Specifications and Construction

The SR4MJ-997 is built to handle the demands of high-flow manifold systems. Its design prioritizes safety and reliability, with external adjustable relief valves available on specific range models (though users should verify specific relief valve configurations for their exact setup). The use of brass for the piston and body ensures compatibility and safety with inert gases. Whether integrated into a larger gas distribution manifold or used as a standalone unit for high-pressure testing, the Victor 0781-1456 delivers consistent performance backed by superior materials and engineering.