0781-3825 - Victor HSR 2533-350 Hydrogen Regulator CGA 350

Precision Hydrogen Control with Victor HSR Series

The Victor 0781-3825 HSR 2533-350 Hydrogen Medium Duty Single Stage Flow Meter Regulator is engineered to provide exceptional accuracy and reliability for industrial gas control. Part of the renowned HSR series, this regulator is specifically calibrated for hydrogen gas service, featuring a CGA 350 inlet connection compatible with standard hydrogen cylinders. The unit is designed to manage inlet pressures up to 3000 PSIG while delivering a consistent and precise outlet pressure ranging from 5 to 40 PSIG. This specific pressure range is particularly well-suited for MIG and TIG welding applications where stable gas flow is critical for shielding integrity and weld quality.

Constructed with a die-forged brass body, the HSR 2533-350 offers robust durability capable of withstanding the rigors of industrial environments. The internal mechanism features a stem-type seat that ensures a tight seal and reliable operation over time. A key component of its precision is the fabric-reinforced neoprene diaphragm. Unlike standard rubber diaphragms, this reinforced material provides superior sensitivity to pressure changes, allowing for fine-tuned adjustments and stable delivery even as cylinder pressure decays. This ensures that the flow rate remains constant, minimizing the need for frequent readjustments during operation.

Safety and longevity are paramount in the design of the Victor 0781-3825. The regulator includes an external self-reseating relief valve, which provides a critical safety layer by venting excess pressure if it exceeds safe limits, then automatically resealing to prevent gas loss. Additionally, a bronze sintered inlet filter is integrated into the design to trap particulate matter and debris before they can enter the regulator body. This protects the sensitive seat and diaphragm assembly from damage, significantly extending the service life of the unit. With its compact dimensions of 7 inches by 4-1/4 inches by 6-1/4 inches, this regulator offers a powerful combination of performance and space-saving efficiency.