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TELWIN SUPERIOR TIG 251 DC 400V: Professional Power and TIG Welding Precision for Demanding Users
The TELWIN SUPERIOR TIG 251 DC 400V is an inverter TIG and MMA welder built for professionals who accept no compromises. If your daily work calls for surgical precision, reliability in the hardest conditions and excellent quality on every weld, this model is the answer. Picture welding stainless steel, carbon steel, copper or titanium with an ease and control you have not had before, and getting perfectly smooth, strong joints every single time.
Thanks to advanced inverter technology and microprocessor control, the SUPERIOR TIG 251 DC delivers not only impressive power but above all a stable, concentrated arc, which is the key to success in the TIG process. Forget about problems with arc striking or an unstable arc when you weld thin material or complicated shapes. This model was designed to reduce the risk of errors and to limit spatter and thermal distortion, which saves time and material and gives the finished parts a better appearance.
At TELWIN we understand that a welder's work is often a race against time and a fight with a demanding environment. That is why the SUPERIOR TIG 251 DC has a solid build, a high duty cycle and a set of protections that keep it running for years without failures. Whether you work in a workshop, on a production floor or directly on site, this welder gives you the power and versatility you need, so you can focus on what matters most, doing the job perfectly.
Invest in technology that raises the quality of your work to a new level. The TELWIN SUPERIOR TIG 251 DC is more than a tool, it is a partner you can rely on every day while you take on the most ambitious welding projects. See for yourself how advanced TIG functions such as pulse welding, arc dynamics control and precise parameter setting open new options for you and bring results that impress your customers and your supervisors.
Advanced Capabilities of the TELWIN SUPERIOR TIG 251 DC 400V
Masterful TIG Arc Control for Perfect Welds
The TELWIN SUPERIOR TIG 251 DC raises the bar in precise TIG DC welding. Advanced microprocessor control gives the welder full authority over every aspect of the arc. Functions such as TIG PULS and EASY PULS are invaluable on thin stainless or carbon steel sheet, because they reduce the risk of burn through and material deformation. Precise adjustment of pulse frequency and balance gives a narrower heat affected zone and deeper penetration, which is decisive on critical structures.
On top of that, the Bi-Level function (switching between two preset welding current values during work) and full adjustment of the welding cycle parameters (pre-gas, post-gas, up-slope, down-slope, crater current) let the welder match the process to very specific requirements. Whether you weld pipelines, acid resistant steel parts for the food industry or precise machine details, the SUPERIOR TIG 251 DC delivers repeatability and top quality along every millimetre of the weld. HF or LIFT arc striking gives a clean and certain start and removes problems with contamination of the tungsten or the material.
Reliability and Power for Professional MMA Work
The TELWIN SUPERIOR TIG 251 DC is not only a TIG specialist. It is also a powerful and dependable current source for MMA welding. With welding current up to 220A and a high duty cycle, the unit handles stick electrodes up to 5 mm in diameter, including rutile, basic, stainless steel and cast iron types. That makes it a very versatile tool in any workshop and on any building site.
Intelligent functions that support MMA welding, such as Arc Force, Hot Start and Anti-Stick, make the work easier and improve joint quality. Arc Force adjusts the short circuit current dynamically, keeps the arc from going out and holds it stable even with difficult electrodes. Hot Start raises the current at the moment of striking and makes starting easier, while Anti-Stick reduces the current when the electrode sticks, protects it from damage and makes it easy to break free. As a result, welding in forced positions or work on rusty material becomes simpler and more efficient.
A Build Made for Hard Work and Long Life
Professional welding calls for equipment that survives daily, intensive use. The TELWIN SUPERIOR TIG 251 DC was designed for maximum durability and reliability. A solid metal housing with IP23 protection keeps dust and moisture away from the internal components, which matters in workshop conditions and outdoors.
Internal protection systems, including thermostatic, overvoltage, undervoltage and overload protection, monitor the unit constantly, protect it from damage and keep the operator safe. The welder is also prepared for supply from a power generator (of at least 10 kW), which makes it a sound choice for field work. The high duty cycle, reached thanks to effective cooling, allows long welding runs without worrying about overheating. The option of connecting a liquid cooling unit raises output further during TIG welding at high current. This is an investment that pays back over years of trouble free work.
Technical Specification
| Parameter | Value |
|---|---|
| Full name | TELWIN SUPERIOR TIG 251 DC 400V |
| Brand | TELWIN |
| Model | SUPERIOR TIG 251 DC |
| Catalogue number | 816029 |
| EAN code | 8004897914923 |
| Power supply | 400V AC (3-phase) 50/60Hz |
| TIG DC welding current range | 10 - 250 A |
| MMA DC welding current range | 10 - 220 A |
| TIG duty cycle (at 40°C ambient temperature) | 250 A @ 35% ; 180 A @ 60% |
| MMA duty cycle (at 40°C ambient temperature) | 220 A @ 35% ; 170 A @ 60% |
| Open circuit voltage (no load) | 94 V |
| Maximum power input | 6.3 kW (TIG) / 9.2 kW (MMA) |
| Power input (60%) | 4 kW (TIG) / 5.5 kW (MMA) |
| Power factor (cos phi) | 0.8 |
| Minimum generator power | 10 kW |
| MMA stick electrode diameter | 1.6 - 5.0 mm |
| Housing protection rating | IP23 |
| Dimensions (L x W x H) | 430 x 170 x 340 mm |
| Weight | 13.4 kg |
| Conformity with standards | CE, EN 60974-1, EN 60974-10 |
Key Features and Benefits
- Advanced inverter technology with microprocessor control: At the heart of the unit is a modern inverter circuit driven by a microprocessor, which reacts instantly to changing welding conditions and keeps precise control of the arc parameters. For a professional that means a very stable, concentrated arc, minimal spatter, deeper penetration and the ability to weld many different materials at excellent quality. The result is faster work, fewer corrections and welds with very good mechanical properties.
- TIG pulse welding (Puls / Easy Puls): The TIG Puls function and the simplified Easy Puls mode allow welding of very thin material (from 0.5 mm) with minimal heat input, which clearly reduces distortion and burn through. A professional gains the ability to produce neat, even welds on heat sensitive parts, suitable for food or decorative work for example, plus better control of the weld pool in forced positions.
- Dynamic arc striking (HF / LIFT): A choice between contactless high frequency striking (HF) and contact LIFT striking gives an optimal start to the welding process in typical workshop conditions. HF is ideal for clean, precise starts with no contamination of the material, while LIFT is preferred in places sensitive to electromagnetic interference. That flexibility guarantees a sure and clean start and saves time and material.
- Full adjustment of TIG parameters: The unit gives complete control over the TIG welding cycle: gas flow time before and after welding (pre-gas, post-gas), current slope up and down (up-slope, down-slope), final current, and advanced functions such as Bi-Level (two current levels). For an expert this means the arc characteristic can be matched precisely to the task, the material and the thickness, which results in optimal weld quality and full control of the process.
- MMA versatility with support functions: Besides its TIG performance, the welder offers efficient MMA welding with stick electrodes (rutile, basic, stainless steel, cast iron). Arc Force (arc dynamics control), Hot Start (easier electrode striking) and Anti-Stick (prevents the electrode from sticking) make the work considerably easier, even for less experienced welders, and keep MMA welding smooth and stable in varied conditions.
- Professional durability and protection: The SUPERIOR TIG 251 DC was built for intensive use in difficult industrial conditions. It has thermostatic, overvoltage, undervoltage and overload protection, plus protection during work with a power generator. That means reliability, a long service life and safe operation, which for a professional translates into fewer stoppages and confidence in the equipment.
- Prepared for liquid cooling (optional): The unit can work with an optional liquid cooling unit (Telwin G.R.A. for example), which allows the use of cooled TIG torches during long runs at high current. This raises comfort and output on intensive jobs, protects the torch from overheating and extends its service life.
Product Applications
- Production and assembly of carbon steel and stainless steel structures
- Precise pipeline welding in the chemical, food and power industries
- Repair and regeneration of machine and equipment parts
- Advanced metalwork and workshop jobs that call for high weld quality
- Maintenance and upkeep in industrial plants
- Shipbuilding industry (stainless and special steel parts)
- Welding of thin sheet (in ventilation or catering equipment for example)
- Automotive parts (stainless steel exhaust systems, structural details for example)
Summary: TELWIN SUPERIOR TIG 251 DC 400V - Your Best Investment
The TELWIN SUPERIOR TIG 251 DC 400V stands for professionalism in TIG and MMA welding. If you expect the highest weld quality, reliability in typical workshop conditions and precise control of the process, this model was made for you. Advanced functions, a solid build and the reputation of the TELWIN brand are your guarantee of satisfaction and excellent results. Invest in equipment that meets your boldest expectations and lets you carry out projects at the highest international level. Contact us today to learn more and to join the professionals who choose TELWIN.
Catalogue number: 816029
EAN code: 8004897914923
