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TELWIN SUPERIOR TIG 421 DC 400V: Masterly Precision and Power of TIG Welding for Professionals.
Get to know the TELWIN SUPERIOR TIG 421 DC 400V, an inverter welding power source made for the most demanding specialists, those for whom uncompromising quality, reliability and full control over every aspect of the welding process count. If your daily work covers TIG welding with direct current (DC) of unalloyed and low alloy steels, stainless steel, copper, nickel, titanium and their alloys, as well as MMA welding with stick electrodes, this model is the answer to your needs. Forget the limits of your equipment and focus on perfect workmanship.
The TELWIN SUPERIOR TIG 421 DC is not only a powerful tool, it is an intelligent partner in your work. Advanced microprocessor control guarantees an immediate response to changes in the welding conditions and keeps the arc stable and concentrated, even on the most complex tasks. With this machine you will easily reach welds with excellent geometry, deep penetration and a good looking face, while the time needed for finishing work stays short. That translates directly into your output and the profitability of your projects.
Imagine work where every arc ignition is sure and clean, where the pulsing of the current lets you control the heat input precisely when welding thin materials or critical structures, and where the extensive TIG functions let you match the welding characteristic to the specifics of the task. The SUPERIOR TIG 421 DC model offers all of that and more, including the choice of HF (non contact) or LIFT (contact) arc ignition, adjustment of the arc dynamics and a full set of functions for the MMA method such as Arc Force, Hot Start and Anti-Stick.
The solid build, made for work in hard industrial and workshop conditions, combined with a high duty cycle, keeps the machine running even during intensive tasks. The TELWIN SUPERIOR TIG 421 DC is an investment in quality that pays back quickly and lets you carry out the most ambitious welding projects with the confidence and precision of a master. Join the professionals who have put their trust in Telwin technology and raise the standard of your work.
Get to Know the Advanced Capabilities of the TELWIN SUPERIOR TIG 421 DC 400V
TIG Precision at the Highest Level: Control of Every Detail
The TELWIN SUPERIOR TIG 421 DC redefines what precision means in TIG welding. The heart of the machine is an advanced microprocessor that monitors and corrects the arc parameters in real time and gives the arc unmatched stability. Functions such as the adjustment of the starting current (Slope-Up) and the final current (Slope-Down) allow a perfect start and finish of the weld and remove defects such as craters or burn through at the edges. In addition, precise adjustment of the gas pre-flow and post-flow guarantees optimum protection of the weld pool and of the tungsten electrode, which is the key point for clean and strong joints, above all when welding reactive materials such as titanium or stainless steels.
The spot welding mode (Spot Welding) with adjustable time allows fast and repeatable tacking or short welds, which speeds up assembly work considerably. The choice of HF (non contact) or LIFT (contact by scratching) arc ignition gives flexibility in different working environments, HF gives a clean ignition without contaminating the electrode, while LIFT is right where electromagnetic interference has to be kept to a minimum. Each of these functions was designed to give the professional full control over the process and to make perfect results possible every time.
TIG Pulse, the Secret of Excellent Welds in Typical Workshop Conditions
The TIG Pulse function in the TELWIN SUPERIOR TIG 421 DC welder is a powerful tool in the hands of an experienced welder and opens new possibilities in the control of the welding process. With precise adjustment of the pulse frequency, the base current, the peak current and the duty factor (pulse balance), the user can manage exactly how much heat goes into the material. This is invaluable when welding thin sheet, where it keeps the risk of distortion and burn through low, and also when joining materials of different thickness.
Pulsed TIG welding gives a narrower heat affected zone (HAZ), which means lower internal stress in the weld and in the parent material and therefore a more durable joint. The pulsing also makes the weld pool easier to control, above all in constrained positions (for example overhead, vertical), which allows welds with excellent geometry and deep penetration. The appearance of a weld made with pulsed current, with its typical regular ripple pattern, is often wanted in applications where looks matter. For the professional this means the ability to take on more complex and more demanding welding tasks with the highest quality guaranteed.
Reliability and Output for Industry: Built for Hard Work
The TELWIN SUPERIOR TIG 421 DC was built for intensive use in industrial conditions. The three phase 400V supply gives stable operation and the high welding currents needed when joining thicker parts. A key parameter for professionals is the high duty cycle, which in this model is 400A at 40% for TIG and 320A at 60%, which means the machine can work for a long time without breaks for cooling, even at maximum load. That translates directly into higher productivity and efficiency at the welding station.
The solid metal housing with a protection rating of IP23 shows that the machine is made for hard workshop and building site conditions and protects the sensitive electronic components against dust and water drops. Internal thermostatic, overvoltage and undervoltage protections guard the welder against damage caused by an unstable mains or by overheating. The option of connecting a dedicated cooling unit (for example Telwin G.R.A.) is the key point in TIG welding at high currents, since it gives optimum cooling of the torch and extends its service life. All of this makes the SUPERIOR TIG 421 DC a reliable workhorse that can be relied on in the most demanding projects.
Technical Specification
| Parameter | Value |
|---|---|
| Supply voltage | 400V (3 phase) |
| Mains protection | 16 A |
| TIG DC welding current range | 5 - 400 A |
| MMA welding current range | 10 - 400 A |
| TIG duty cycle (EN60974-1 at 40°C) | 400 A @ 40% ; 320 A @ 60% |
| MMA duty cycle (EN60974-1 at 40°C) | 400 A @ 35% ; 300 A @ 60% |
| Open circuit voltage | 64 V |
| Maximum power draw | 13.6 kW (TIG) / 16.6 kW (MMA) |
| Power factor (cos phi) | 0.9 |
| TIG electrode diameter | 1.0 - 4.0 mm |
| MMA electrode diameter | 1.6 - 6.0 mm |
| Working modes | 2 stroke / 4 stroke / 4 stroke Bi-Level |
| TIG arc ignition | HF (non contact) / LIFT (contact) |
| TIG functions | TIG Pulse (adjustment of frequency, base current, peak current, duty factor), adjustment of the starting and final current, of the up slope and down slope time, of the gas pre-flow and post-flow, spot welding |
| MMA functions | Arc Force (adjustable), Hot Start (adjustable), Anti-Stick |
| Remote control can be connected | Yes |
| Cooling unit can be connected | Yes (recommended at high currents and in long continuous work) |
| Protection class | IP23 |
| Dimensions (L x W x H) | 530 x 240 x 450 mm |
| Weight | 28.2 kg |
| Catalogue number | 816068 |
| EAN code | 8004897997667 |
Key Features and Benefits
- Advanced TIG Arc Ignition (HF/LIFT) and Stabilisation: The machine offers two modes of arc ignition: non contact ignition with high frequency (HF), right for precise work where contamination of the welded material with tungsten is not acceptable, and contact LIFT ignition, preferred in environments sensitive to electromagnetic interference. Microprocessor control gives an immediate and stable ignition and holds the arc at its optimum characteristic through the whole welding cycle. For the professional this means a clean and sure start of every weld, a lower risk of welding defects and the ability to work in varied conditions with no compromise on the quality of the joint.
- Versatile TIG Pulse with Full Adjustment: The pulsed TIG current function allows precise control over the amount of heat introduced into the material. The user can adjust the pulse frequency, the base current, the peak current and the pulse duty factor. This is the key point when welding thin sheet (keeping distortion and burn through low), materials sensitive to overheating, and also on demanding welds in constrained positions, where control of the pool is critical. The result is better penetration, a narrower heat affected zone, an excellent look of the weld face and lower stress.
- Strong Output and a High Duty Cycle: Thanks to the three phase 400V supply and advanced inverter technology, the SUPERIOR TIG 421 DC delivers a welding current of up to 400A with an impressive duty cycle (400A at 40% for TIG). This means long, uninterrupted work at high loads is possible, which is needed in industrial and production use and on large projects. The professional gains the certainty that the machine will cope with intensive tasks without the risk of overheating or of a drop in output.
- Intelligent Functions for the MMA Method: Besides its excellent TIG parameters, the welder offers full support for the MMA method. The Hot Start function makes striking the electrode easier by raising the current for a moment at the beginning of welding. Arc Force adjusts the arc current dynamically, prevents the arc from going out and makes welding easier in difficult positions and with problematic electrodes. Anti-Stick prevents the electrode from sticking to the material and protects it against damage. For the welder this means more flexibility, easier work and better quality MMA welds.
- Advanced Control Panel and Working Modes: The clear control panel with a digital display allows all the welding parameters to be set precisely. The available working modes (2 stroke, 4 stroke, 4 stroke Bi-Level) allow the process to be optimised according to the type of task and the preference of the welder. The 4 stroke mode reduces fatigue on long welds, while Bi-Level allows switching between two current levels during welding. That gives comfort, control and the option of matching the machine to an individual style of work.
- Solid Build and Protections: The welder was designed for work in demanding industrial conditions. The durable housing (IP23) protects the internal components against dust and moisture. The machine has a number of thermostatic, overvoltage and undervoltage protections, which guarantees long and trouble free operation. For the user this means a sure investment and reliable equipment even in a hard workshop environment or on the building site.
Product Applications
- Heavy industry and production: welding of steel structures, machines, equipment.
- Maintenance and repairs: reconditioning of parts, machine repairs in industrial plants.
- Pipeline construction: welding of carbon steel and stainless steel pipe in the chemical, petrochemical and food industries.
- Shipbuilding industry: assembly and repair of ship parts.
- Food and pharmaceutical industry: welding of tanks and installations from stainless steel.
- Metalworking and specialist workshops: production of railings, gates and parts from acid resistant steel.
- Ventilation and air conditioning systems: joining of ducts and parts from stainless steel.
- Work that requires high quality and a good looking TIG weld.
Summary: TELWIN SUPERIOR TIG 421 DC 400V, Your Best Investment
The TELWIN SUPERIOR TIG 421 DC 400V is an undisputed leader in its class and offers professionals unmatched power, precision and versatility in TIG DC and MMA welding. Advanced functions such as TIG Pulse, intelligent arc ignition and a high duty cycle guarantee the highest weld quality and efficient work even in the hardest conditions. This is a reliable tool that will meet every challenge and let you carry out projects faster, better and with more confidence. Invest in technology that will lift your skills to a master level. Choose the TELWIN SUPERIOR TIG 421 DC and feel the difference. Contact us or an authorised Telwin distributor to learn more and to experience the power of precision.
Catalogue number: 816068
EAN code: 8004897997667
