0781-0543 - Victor SR 450E-580 Heavy Duty Inert Gas Regulator, 10-200 PSIG Delivery

Precision and Power for Inert Gas Applications

For professional welders and fabricators requiring a robust gas control system, the Victor 0781-0543 SR 450E-580 Regulator delivers high-performance results. This single-stage, heavy-duty regulator is designed for inert gas service (Argon, Nitrogen, Helium) and features a CGA 580 connection. It is ideal for applications where a slight rise in delivery pressure as the cylinder drains is acceptable, offering a cost-effective alternative to two-stage models without sacrificing build quality.

Superior Construction

The heart of the SR 450E-580 is its 3.25-inch stainless steel diaphragm. This material choice eliminates the elasticity issues associated with rubber diaphragms in extreme temperatures, ensuring consistent pressure response. The regulator body is die-forged brass, providing the mass and strength needed to resist deformation and damage in rough shop environments. The gauge casing is also brass, housing large 2.5-inch gauges that are easy to read at a glance—one measuring cylinder pressure up to 4000 PSIG and the other measuring delivery pressure up to 400 PSIG.

Operational Specs

With a flow coefficient (Cv) of 0.27, this regulator supports medium to high capacity flow rates. The delivery range of 10-200 PSIG is versatile enough for a wide variety of tasks, from purging piping systems to supplying automated welding cells. The outlet connection is a standard 5/8"-18 RH(F), compatible with most standard inert gas hoses. Internal components include a stem-type seat mechanism and a stainless steel ball in the key for smooth adjustment. The Delrin insert bushing reduces friction, making pressure setting effortless. If your operation demands a regulator that combines heavy-duty durability with the precision of stainless steel internals, the SR 450E-580 is the tool for the job.