9100316 - Harris E3-43 High-Flow Equal Pressure Mixer for 43-2 Handles

Technical Overview of the Harris Model E3-43 Mixer

The Harris Model E3-43 (also referenced as F-43 in specific contexts) is a heavy-duty, high-flow equal pressure mixer designed for industrial oxy-fuel applications. Engineered to operate with positive pressure fuel gases, this mixer utilizes an "E" type mixing chamber where oxygen and fuel gas enter at equal pressures to create a stable and efficient flame. This design is critical for maintaining safety and performance across a wide range of output requirements, from precision welding to high-intensity heating.

Manufactured from solid brass, the E3-43 is built to withstand the thermal and mechanical stresses of heavy fabrication environments such as shipbuilding and structural steel work. It features a 1/2"-25 mixer-to-tip tube thread size, ensuring compatibility with a broad array of Harris tip tubes, including the T-43 and 2393 series. The mixer is specifically calibrated for use with Harris Model 43-2 torch handles, though it also retains compatibility with Model 18-5 handles for light alternate fuel heating applications. Its internal geometry is optimized to prevent flashbacks and sustain high flow rates without turbulence.

One of the defining technical characteristics of this model is its "All Fuel Gases" compatibility. Whether the fuel source is Acetylene, Hydrogen, Natural Gas, Methane, Propane, or Propylene, the E3-43 delivers consistent mixing ratios. The unit boasts a substantial capacity range, capable of welding steel plates up to 3/4 inch (19.0mm) thick and generating heating outputs up to 1,025,000 BTU when paired with the appropriate high-capacity tips. This mixer is UL® listed and meets CGA-E-5 certification standards, ensuring compliance with rigorous industrial safety protocols.