Esab 639439 Welding Heating Head Purox W 300 W 400

Product Description

The ESAB 639439 is a welding and heating head designed for use with Purox W 300 and W 400 torch bodies. At 7.75 inches in overall length with a 2A tip number, this head provides the reach and output profile needed for manual oxy-fuel welding and heating applications. It is a direct-fit replacement component intended for professional welders, pipefitters, and HVAC technicians who rely on Purox-series torch equipment for brazing, fusion welding, and localized heating tasks on metal workpieces.

This heating head is suited for shop and field applications where a Purox W 300 or W 400 torch body is already in service. Typical use cases include pipe brazing, sheet metal welding, and general-purpose heating in mechanical and plumbing trades. The 2A tip designation places it in the mid-range output category for this torch series, making it appropriate for light-to-medium thickness base metals in both residential and light commercial work environments.

Key Features

• 7.75-inch overall length provides extended reach for confined or deep-access work areas
• Tip Number 2A delivers mid-range flame output suitable for light-to-medium base metal thicknesses
• Designed specifically for Purox W 300 and W 400 torch body compatibility
• Sold as a single unit, making it practical for individual replacement without over-ordering

Compatibility

Designed for use with Purox W 300 and W 400 torch bodies.

Installation Notes

Installation should be performed by a qualified welder or pipefitter familiar with oxy-fuel torch equipment. Always close both the oxygen and fuel gas supply valves and bleed the torch lines before removing or attaching any torch tip or head. Inspect the seat and threads for damage or debris before threading the head onto the torch body. Ensure the connection is hand-tight plus a snug tool turn — do not overtighten, as this can damage the seat and cause gas leaks.