The AQUA liquid cooling system, integrated into the TELWIN SUPERIOR TIG 421 DC model, is the key to uninterrupted operation at high currents and long welding cycles. The cooler effectively lowers the temperature of the TIG welding chuck, preventing overheating and prolonging the life of both the chuck itself and its consumable parts, such as ceramic nozzles and collets.

For the professional welder, this means first and foremost greater comfort, eliminating the discomfort of a hot handle, allowing longer concentration and more precise arc guidance. What’s more, stable handle temperature translates into stable welding parameters and higher weld quality. The AQUA system allows full utilization of 400A power, which is essential when welding thick structural materials or pipelines, where continuity and high productivity are required. It’s an investment in the reliability and productivity of your welding station.

The TELWIN SUPERIOR TIG 421 DC offers advanced TIG pulse current welding features that open up new possibilities for the welder to precisely control the process. Adjustment of pulse frequency, base current, peak current and fill factor allows optimization of the linear energy introduced into the material. This is especially important when welding thin sheet metal, where it minimizes the risk of burn-through and distortion, as well as when welding overheat-sensitive materials such as stainless steels or nickel alloys.

The EASY PULSE function simplifies setup by automatically selecting the optimal pulse parameters based on the set welding current, which is ideal for getting started quickly. Advanced users can manually tune each parameter to achieve perfect penetration, weld face shape and aesthetic appearance. TIG pulse welding also means better control over the weld pool in forced positions, resulting in welds of higher metallurgical quality and excellent appearance, reducing the need for time-consuming post-processing.

Although the TELWIN SUPERIOR TIG 421 DC is a champion in TIG welding, its capabilities in MMA (metal electrode welding) are equally impressive, making it an extremely versatile tool. The device features three key technologies that significantly simplify and improve the MMA welding process:

Hot Start: Provides a momentary increase in welding current upon arc ignition. This facilitates electrode ignition, especially when welding on cold material or when using difficult to ignite electrodes (such as alkaline). The result is a sure and fast start without sticking.

Arc Force: Dynamically adjusts the welding current while shortening the arc length. When a drop of molten metal from the electrode passes into the weld pool, this function prevents the arc from “dimming” and the electrode from sticking, ensuring a stable and smooth welding process, even with a short arc, which is key to achieving a good fusion.

Anti-Stick: Automatically reduces the welding current to a minimum if the electrode sticks to the material. This allows you to easily detach the electrode without damaging it (flare) and without risking damage to the welder.

With these features, MMA welding becomes simpler, more efficient and accessible even to those with less experience, and professionals will appreciate the stability of the process and the high quality of the welds obtained.

TELWIN SUPERIOR TIG 421 DC in AQUA+TROLLEY configuration is a complete mobile welding station, ready to meet the challenges of working in various locations. The robust and ergonomically designed TROLLEY cart not only makes it easy to transport the heavy equipment along with the cooler and gas cylinder, but also provides an organized and safe work area.

The cart has a special place for a cylinder of shielding gas, shelves for accessories and holders for wires, which minimizes clutter and tripping hazards. Large, sturdy wheels (often with brakes) allow the kit to be easily maneuvered over uneven workshop or construction site surfaces. For the professional, this saves time and effort in moving and setting up the equipment, as well as improving safety and ergonomics. Thanks to this solution, the welder is always where it is needed, ready for immediate use.