0323-0250 - Victor Size 4 MFA Acetylene Rosebud Heating Tip

Victor 4-MFA Heating Nozzle: Precision Engineering for Industrial Heating

The Victor 4-MFA Heating Nozzle (SKU: 0323-0250) represents a standard of excellence in oxy-fuel heating applications. Designed as a multi-flame heating head, commonly referred to in the industry as a "rosebud," this nozzle is engineered to provide a high-volume heat output for heavy-duty industrial tasks. It is specifically calibrated for use with Acetylene and Hydrogen fuel gases, leveraging the high flame temperature and heat transfer properties of these fuels to deliver approximately 29,400 BTUs per hour.

Technically, the 4-MFA is distinguished by its internal geometry. It utilizes an individual spiral mixer, a critical design feature that ensures the fuel gas and oxygen are thoroughly blended before reaching the flame ports. This spiral mixing action not only optimizes combustion efficiency but also significantly mitigates the risk of flashback, a common concern in high-flow heating operations. The nozzle is constructed as a single-piece unit, robust enough to withstand the thermal cycling inherent in heat treating and straightening processes.

Compatibility is a key specification for this component. The 4-MFA is designed to fit Victor 300 Series Torch Handles (including the 300FC). The connection point features a double O-ring seal, providing a redundant gas-tight barrier that prevents leaks at the handle interface. A brass coupling nut with a built-in snap ring secures the nozzle, ensuring mechanical stability during operation. With a length of 12 inches, the nozzle allows the operator to maintain a safe working distance from the radiant heat of the workpiece while directing the multi-flame cone precisely where needed.

Operators must adhere to safety protocols regarding acetylene withdrawal rates when using this nozzle. Due to the volume of gas required for a size 4 multi-flame tip, users should ensure their cylinder capacity is sufficient to prevent acetone withdrawal (adhering to the 1/7th rule) or utilize a manifold system if necessary.