Helvi Compact 355HF TIG Inverter Welder

Key features include a broad adjustable output current range (10–350 A), high-frequency start for aluminum, low-input voltage compensation for generator use, adaptive arc force, and pulse frequency control. It also offers a user-friendly two-button operation for quick setup and efficient power usage.

This TIG inverter is well-suited for aluminum applications thanks to HF start, and it can weld other common TIG metals such as steel and stainless steel as well, using appropriate tungsten and shielding gas settings.

Yes. It includes low-input voltage compensation and is designed to perform reliably on generator power, making it portable for job sites where mains power may be unstable or unavailable.

The two-button control simplifies setup, while the digital control system and adjustable arc features let you quickly dial in amperage and welding parameters. This combination supports fast setup and consistent results, even for beginners with some TIG experience.

Ideal for aluminum fabrication projects, automotive bodywork, bike frames, aerospace-related metalwork, marine applications, and DIY metal projects that require precise TIG welding with HF start and stable arc control.

The unit is designed to meet relevant international safety standards and includes features aimed at protecting the operator. Always wear appropriate PPE (welding helmet, gloves, fire-resistant clothing), ensure proper ventilation, follow safe gas handling practices, and keep the work area free of flammable materials.

Compared to other TIG inverters, the 355HF emphasizes higher amperage range and HF start capability with adaptive arc control and pulse frequency, offering strong performance for aluminum and demanding TIG jobs. For direct comparisons, you can view similar models on Fepy such as the Helvi Compact 275HF TIG Inverter Welder and the Helvi Compact 455HF TIG Inverter Welder.

Comparable models include the Helvi Compact 275HF TIG Inverter Welder and the Helvi Compact 455HF TIG Inverter Welder. The 275HF generally offers a lower amperage ceiling suitable for lighter work, while the 455HF provides higher amperage for more demanding jobs. See the product pages for exact specs and pricing: https://fepy.com/product/helvi-compact-275hf-tig-inverter-welder and https://fepy.com/product/helvi-compact-455hf-tig-inverter-welder

Recommended setup: connect the welder to a suitable power source (consider generator if necessary due to voltage needs), connect the shielding gas (argon) through the TIG torch, attach the earth/clamp, select the appropriate amperage within 10–350 A, ensure proper tungsten type and gas flow, then enable HF start to begin welding. Follow safe operating procedures throughout.

Regularly inspect power cables and TIG torch leads for wear, keep connectors clean and dry, ensure gas lines are free of leaks, replace consumables as needed, and store the unit in a clean, dry environment. Periodic cleaning and checking of adapters and connections help maintain consistent performance.

If the arc is unstable or starts poorly, verify proper shielding gas flow, ensure a clean tungsten tip, check ground clamp connection, confirm the workpiece is clean, and verify amperage setting is appropriate for the material thickness. Also inspect cables for damage and ensure the power source is supplying stable voltage; if issues persist, consult the user manual or supplier support.

Typical inclusions often cover the TIG torch, earth clamp, power leads, and basic manuals. Depending on the seller, you may also find gas hoses, regulators, and consumables sold separately. Consider additional consumables (tungsten electrodes, filler rod, gas regulator) based on your typical welding projects.