4000546 - Harris 447 Pipeline Inert Gas Guard Flow Control Regulator

Harris Model 447-80-IGG-1/4 Pipeline Inert Gas Guard Regulator

The Harris Model 447-80-IGG-1/4 is a premium heavy-duty pipeline flow control device engineered specifically to address the inefficiencies and quality issues associated with shielding gas surge in MIG (GMAW) and TIG (GTAW) welding operations. Known as the "Inert Gas Guard" (IGG), this regulator is designed to be installed at station drops on gas distribution pipelines, providing precise flow control for Argon and Carbon Dioxide (CO2) shielding gases. The primary function of the IGG system is to eliminate the initial surge of gas that occurs when a welding torch trigger is pulled, a phenomenon that not only wastes expensive consumables but can also introduce turbulence into the weld pool, leading to porosity and inconsistent bead profiles.

Constructed with a robust brass-plated body and bonnet, the Model 447 ensures long service life even in demanding industrial environments. The regulator features a 1/4-inch NPT female inlet connection, making it compatible with standard hard-piped gas systems, and a 5/8"-18 RH female outlet for standard gas hose connections. The flow is easily adjustable via a brass "T" screw handle, offering smooth operation and precise setting of flow rates up to 80 SCFH (Standard Cubic Feet per Hour). A 2-inch gold-painted steel gauge provides clear visual indication of the flow setting, calibrated for both Argon and CO2.

Internally, the regulator utilizes a rubber diaphragm for superior pressure control and sensitivity. The one-piece encapsulated seat design includes an internal filter, which is critical for protecting the PTFE Teflon® seat from particulate contamination often found in pipeline systems. This design feature significantly extends the maintenance intervals and reliability of the unit. By maintaining a constant flow and preventing pressure buildup in the hose when the arc is off, the Harris 447-80-IGG-1/4 delivers substantial cost savings by reducing gas waste, often paying for itself in a short period depending on usage volume. It conforms to the CGA E-4 standard for gas pressure regulators and is backed by Harris's 7-year warranty, underscoring its quality and durability.