The TELWIN SUPERIOR TIG 421 DC redefines the concept of precision in DC TIG welding. The advanced microprocessor controlling the inverter guarantees an extremely stable and concentrated welding arc, which is crucial when working with demanding materials such as stainless steel, nickel alloys or titanium. The operator has full control over the process thanks to precise welding current control starting from 10A, which allows welding both very thin and thick parts.

Functions such as the Slope Up and Slope Down adjustments allow for a smooth start and stop of welding, minimizing the risk of welding defects such as craters or cracks. In addition, the Pre Gas / Post Gas precise timing control ensures optimum protection of the weld pool and tungsten electrode, resulting in a clean and strong weld. This is the ideal tool for professionals who value the highest quality and repeatable results.

The Puls TIG function on the SUPERIOR TIG 421 DC is a real game-changer for welders striving for perfection. It allows welding with pulsed current, where peak current and base current are alternately applied. The operator can fine-tune the pulse frequency, base current and pulse fill factor. Such control allows a significant reduction in the amount of heat input into the material, which is invaluable for welding thin sheets (minimizing distortion and burn-through) and heat-sensitive materials.

Pulsed TIG welding with SUPERIOR TIG 421 DC also means better control of the weld pool, especially in forced positions (e.g., ceiling, vertical). The result is welds with an excellent appearance, with a clear scale pattern, and better metallurgical properties. This feature is particularly appreciated in industries where aesthetics and weld quality are a priority, such as in the production of stainless steel railings, decorative elements or in the food and pharmaceutical industries.

TELWIN SUPERIOR TIG 421 DC is designed for uninterrupted and trouble-free operation in harsh industrial environments. The 400V three-phase power supply guarantees stable output performance even under heavy loads. The rugged IP23-rated metal housing protects internal components from dust and moisture, which is crucial in workshop and production environments.

The device is equipped with a comprehensive safety system, including thermal protection, over- and under-voltage protection, and over-current protection. These intelligent systems monitor the welder’s operation in real time and automatically shut it down if necessary, protecting both the machine and the operator. In addition, the SUPERIOR TIG 421 DC is suitable for use with power generators (with a voltage fluctuation tolerance of +/- 15%), increasing its mobility and versatility in the field.

Working with the TELWIN SUPERIOR TIG 421 DC welder is a pleasure, even during long work cycles. Despite its power, the device is characterized by a well-thought-out design and relatively compact dimensions for its class, which makes it easy to move it within the workshop or production hall. An intuitive control panel with a digital display and clear pictograms makes the configuration of even advanced parameters fast and hassle-free.

Another important advantage is the extensive standard equipment marked “+ ACC.” The kit includes a professional TIG welding chuck (e.g. type ST26 or equivalent for 400A), a ground cable with clamp, a hose for shielding gas connection and often a basic set of consumables for the TIG chuck (e.g. electrodes, ceramic nozzles, collets). As a result, immediately after unpacking, the welder is ready to take on the toughest welding challenges, saving time and additional costs associated with completing accessories.