639966 - Victor 70A Mixer for W-300/W-400 Torch Handles

Precision Gas Mixing for Heavy-Duty Applications

The Victor #70A Mixer (ESB639966) is an essential component for professional welders and fabricators utilizing heavy-duty oxy-fuel equipment. Manufactured by ESAB under the renowned Victor brand, this mixer assembly is engineered to seamlessly integrate with W-300 and W-400 series torch handles (formerly known as the 300 and 400 series). Its primary function is to blend oxygen and fuel gases—such as acetylene, propane, or propylene—in the precise ratios required for stable welding, brazing, and heating flames.

Constructed from high-quality solid brass, the 70A Mixer is built to withstand the rigorous demands of industrial environments, including high thermal stress and mechanical impact. The precision-drilled internal chambers ensure smooth gas flow and optimal turbulence for thorough mixing, which is critical for preventing flame fluctuations and minimizing the risk of flashbacks. This attention to detail results in a cleaner, more controllable flame that allows operators to perform high-quality work on thick steel sections or delicate brazing projects alike.

Installation is straightforward and secure. The mixer features a threaded coupling nut that attaches firmly to the torch handle, while dual O-ring seals prevent gas leakage at the connection point. Once installed, the 70A Mixer serves as the mounting point for various welding nozzles and heating elbows, effectively transforming a standard torch handle into a versatile multi-process tool. Whether you are performing structural repairs, pipe welding, or pre-heating heavy castings, this mixer provides the reliability and performance professionals expect from Victor equipment.

Key Specifications

• Model: 70A
• Compatibility: Victor W-300, W-400, 300 Series, 400 Series Handles
• Material: Heavy-Duty Brass
• Application: Welding, Brazing, Heating