0781-1405 - Victor SR 4F-540 High Pressure Oxygen Piston Regulator 30-750 PSIG

Victor SR 4F-540 Heavy Duty High Pressure Oxygen Regulator

The Victor SR 4F-540 (0781-1405) is a premium heavy-duty high-pressure piston regulator designed specifically for demanding industrial applications. Engineered by Victor, a leader in gas control equipment, this regulator is part of the SR 4 Series, known for its robust construction and reliability in high-pressure environments. Unlike standard diaphragm regulators, the SR 4F-540 utilizes a brass piston actuation mechanism, which provides superior durability and resistance to damage when handling high delivery pressures ranging from 30 to 750 PSIG.

Constructed with a machined brass body and housing cap, this regulator is built to withstand the rigors of heavy industrial use. The internal components feature a cartridge-type seat assembly with a PCTFE seat, ensuring a tight seal and long service life. A sintered bronze inlet filter is integrated into the design to prevent debris from entering the regulator, further extending its operational lifespan. For precise control, the regulator includes a Delrin cap bushing that facilitates smooth and accurate pressure adjustments, critical for applications such as pressure vessel and dead-end testing.

Safety and compatibility are paramount in the design of the SR 4F-540. It features an external adjustable relief valve to prevent over-pressurization. The unit is equipped with a CGA 540 inlet connection, suitable for standard oxygen cylinders, and supports a maximum inlet pressure of 3000 PSIG. The outlet is fitted with a 1/4-inch Swagelok connection with a 1/4-inch stainless tube fitting, providing a secure and leak-proof attachment point for downstream equipment. Large 2.5-inch brass gauges allow operators to easily monitor both cylinder and delivery pressures.

This regulator is an essential tool for professionals requiring consistent high-pressure oxygen delivery. Its panel-mounting capability (requiring a 1.75-inch hole) adds versatility for installation in test benches or custom manifolds. Whether used for testing pressure vessels or other high-pressure oxygen applications, the Victor SR 4F-540 delivers the performance and safety required by industry standards.