0323-0261 - Victor 12-MFA Acetylene Heating Nozzle Size 12

Technical Overview of the Victor 12-MFA Heating Nozzle

The Victor 12-MFA Heating Nozzle (SKU: 0323-0261) is a high-capacity, multi-flame heating head engineered for industrial applications requiring significant heat input, such as heat treating, straightening, and priming heavy metal sections. This specific nozzle is a Size 12, indicating a large orifice configuration capable of delivering substantial BTU output when paired with the appropriate fuel supply. It is strictly designed for use with Acetylene or Hydrogen fuel gases and is not compatible with alternate fuels like Propane or Natural Gas, which require different injector designs (such as the MFN series).

Structurally, the 12-MFA features a one-piece design that integrates the tip and mixer into a single robust unit. The internal geometry includes an individual spiral mixer, a critical component that optimizes the velocity and turbulence of the oxygen and fuel gas mixture to ensure a stable, high-temperature flame while mitigating the risk of flashback. The assembly measures approximately 17-1/2 inches in length, providing the operator with sufficient reach and distance from the radiant heat of the workpiece. Connection to the torch handle is secured via a brass coupling nut with a built-in snap ring and a double O-ring seal mechanism, ensuring a gas-tight fit within the torch head.

This nozzle is specifically calibrated for use with Victor HD 310C series torch handles and requires a 3/8-inch hose to accommodate the necessary flow rates. Operators must adhere to safety protocols regarding acetylene withdrawal; specifically, the withdrawal rate from an individual cylinder should not exceed 1/7th of the cylinder's contents per hour. For a nozzle of this size (Size 12), a manifold system is often required to supply the necessary volume of acetylene safely without drawing acetone from the cylinder.