98W77 - Weldcraft 98W77 Back Cap O-Ring for WP-9/20 Torches (2-Pack)

Maintain Peak TIG Performance with Genuine Weldcraft Seals

In the precision world of TIG welding, even the smallest component plays a critical role in the quality of your final weld. The Weldcraft 98W77 O-Ring is a vital maintenance part designed to ensure the integrity of your shielding gas coverage. Specifically engineered for the popular WP-9 air-cooled and WP-20 water-cooled TIG torch series, this O-ring provides the essential seal between your back cap and the torch body. Without a proper seal in this location, atmospheric air can be aspirated into the gas stream, or expensive argon can leak out before reaching the weld pool, leading to frustration and compromised results.

Manufactured by Miller Electric under the Weldcraft brand, these O-rings are made from high-quality silicone. Unlike standard rubber which may degrade quickly under the high-heat conditions of TIG welding, silicone offers excellent thermal resistance and elasticity. This ensures that the O-ring maintains its shape and sealing properties even after repeated thermal cycling and back cap changes. Whether you are welding in a professional fabrication shop or a home garage, using genuine parts guarantees that your equipment functions exactly as the manufacturer intended.

Gas leaks are often the silent killer of weld quality, causing porosity, tungsten oxidation, and unstable arcs. Often, a welder might suspect their gas lens or flowmeter, when the culprit is simply a dried-out or cracked O-ring at the back of the torch. By keeping a pack of 98W77 O-Rings in your toolbox, you can troubleshoot and resolve these issues in seconds. This package contains two O-rings, ensuring you have a spare on hand for your next maintenance interval. Trust Josef Gas to supply the genuine consumables you need to keep your arcs smooth and your welds clean.