3100405 - Harris Model 725 Heated Two-Stage Flow Meter Regulator CGA 580

Harris Model 725 Heated Two-Stage Flow Meter Regulator

The Harris 3100405 is a premium industrial flow meter regulator designed to address two critical challenges in gas delivery: pressure stability and thermal management. Part of the renowned Model 725 series, this regulator features a sophisticated two-stage design. Unlike single-stage counterparts that allow outlet pressure to fluctuate as the cylinder drains, the two-stage mechanism reduces cylinder pressure to an intermediate level before the final delivery stage. This ensures that the flow rate remains rock-steady at the set 0-100 SCFH, regardless of whether the supply cylinder is full or nearing depletion. This level of precision is essential for automated welding processes, laboratory applications, and critical purging operations where flow consistency is paramount.

A defining feature of this unit is its integrated electric heating assembly. Expanding compressed gas from high cylinder pressure to low working pressure causes a rapid temperature drop due to the Joule-Thomson effect. In high-flow applications, this can lead to internal freezing, dry ice formation, or external frosting that compromises the regulator's performance and lifespan. The Harris 3100405 incorporates a 200 Watt, 120 Volt heater directly into the regulator body. This thermal regulation maintains the gas and the regulator components at an optimal operating temperature, preventing freeze-up and ensuring continuous, uninterrupted flow even during heavy duty cycles.

Constructed for durability, the regulator boasts a chrome-plated brass bonnet and body. This material choice offers excellent resistance to corrosion and mechanical wear, suitable for harsh industrial environments. The unit is equipped with a CGA 580 inlet connection, making it compatible with standard inert gas cylinders including Nitrogen, Argon, and Helium. The internal design includes a one-piece encapsulated seat with a built-in filter (PTFE Teflon) to screen out particulates, further enhancing reliability and service life. With a flow capacity of up to 100 SCFH, this regulator is engineered to meet the demands of high-volume gas delivery systems while maintaining the precision Harris is known for.