796F72 - Weldcraft 796F72 Long Lava Cup #5 for 9/20 Series Torches

Technical Overview of the Weldcraft 796F72 Long Lava Nozzle

The Weldcraft 796F72 is a specialized TIG welding nozzle designed to address specific thermal challenges encountered in precision fabrication. Classified as a #5 nozzle with a 5/16-inch (7.9 mm) orifice, this component is manufactured from Lava (ceramic), a material distinct from standard high-alumina ceramics. Lava is chosen for its unique thermal expansion properties, which allow it to withstand rapid temperature changes and high levels of reflected heat without structural failure. This specific nozzle features a "Long" configuration, measuring approximately 1-7/8 inches in length, which serves to extend the electrode stick-out reach and improve arc visibility in deep or narrow joints.

This consumable is engineered for compatibility with the "2 Series" family of TIG torches. This includes widely used air-cooled models such as the WP-9 and water-cooled models like the WP-20 and WP-25, as well as their Miller equivalents (A-125, W-200, W-250, etc.). The threaded interface ensures a secure fit onto the collet body or gas lens assembly, maintaining a gas-tight seal for efficient shielding gas coverage. The use of Lava material is critical in applications where the nozzle is subjected to intense radiant heat, such as welding inside pipes, corners, or box sections. In these scenarios, standard alumina nozzles often suffer from thermal shock—expanding and contracting unevenly—which leads to cracking. The 796F72 mitigates this risk, ensuring longer service life and reduced downtime for consumable replacement.

Industrial maintenance and repair operations (MRO) benefit from the durability of this nozzle in high-duty-cycle environments. By utilizing the 796F72, operators can maintain consistent gas flow characteristics even under thermal stress. The nozzle's internal geometry is designed to laminarize gas flow to a degree, although it is typically used with standard collet bodies. For optimal performance, it is recommended to verify the torch series and current setup to ensure proper thread engagement and gas seal.