0781-1442 - Victor SR4J-346 High Pressure Air Regulator 200-3000 PSIG

Heavy Duty Piston Regulator for High Pressure Air

The Victor 0781-1442 SR 4J-346 is a specialized high-pressure piston regulator tailored for demanding testing and pneumatic applications. Engineered by Victor, a leader in gas control equipment, this regulator is optimized for scenarios where delivery pressures up to 3000 PSIG are required. The unit operates on a piston actuation mechanism rather than a traditional diaphragm. Piston regulators are preferred in high-pressure service because they eliminate the risk of diaphragm rupture and provide a more robust response to pressure changes, making them ideal for dead-end testing and pressure vessel certification.

Technical specifications define the capability of this device. It supports a maximum inlet pressure of 3000 PSIG and offers a delivery range of 200 to 3000 PSIG. The inlet is a standard CGA 346 for air service, ensuring compatibility with high-pressure air cylinders. The outlet features a high-quality 1/4" Swagelok fitting, designed to accommodate 1/4" stainless steel tubing, which is critical for maintaining system integrity at high pressures. The regulator also includes 2.5-inch brass gauges that provide clear, easy-to-read monitoring of both cylinder and delivery pressures.

Durability is central to the SR4J-346's design. The body and housing cap are machined from solid brass, providing substantial weight and strength. The internal cartridge seat assembly utilizes PCTFE material, selected for its hardness and ability to maintain a tight seal under high stress. Additionally, the regulator is equipped with an external adjustable relief valve (on applicable models) and a sintered bronze inlet filter to ensure clean operation. For welders and fabricators involved in pressure testing piping systems or vessels, this regulator offers the precision and safety necessary for critical sign-offs.