CFI HF Welder - Inductotherm Group Taiwan

CFI HF Welder

The Thermatool™ CFI HF Welder is the most reliable Solid State tube and pipe welder on the market. With over a thousand CFI HF Welders installed worldwide at fixed frequencies between 150 and 800kHz, CFI Welders are the most advanced, field proven HF Welder available for tube and pipe production. Every Thermatool™ HF Welder is backed by world-leading weld process and materials knowledge, providing each customer the best approach to meeting challenging welding application needs.


Inductotherm Group Taiwan

10, Gongye W. 5th Rd., Lukang, Changhua County

  • Phone: 886-4-7811630
  • Fax: 886-4-7811631



  • Patented full range Thermatool™ AutoMatch™ ensures full power output over wide range of product sizes
  • Simplified touchscreen operator display provides full control of all HF Welder functions
  • Power set-point maintained within 0.5%
  • Fixed frequency maintained within 1.0%
  • Excellent low weld power output stability and regulation for welding at mill jog speeds (as low as 1% power)
  • Power factor over 0.95
  • High efficiency rating of 85%
  • Available with dual induction/contact output
  • DC Ripple less than 0.5%
  • Low harmonic distortion rectifier
  • Standard speed/power control simplifies operation and significantly reduces scrap through accurate control of weld power in relation to mill speed at start-up and ramp down
  • Short-circuit tolerant CFI technology ensures reliable operation through coil arc-overs
  • Stabilized HF weld frequency (HF Weld frequency is a proven key process parameter that must be controlled)
  • Highest reliability
  • Simple, modular design and packaging (reduces spare parts stocking requirements)
  • Sealed cabinet, designed for real-world tube and pipe mill environments

Note: Custom configurations are available for special alloys, non-ferrous materials and thin-walled materials

Tech Specs

Standard Power Ratings: 50 kW-1200 kW
Fixed Frequency Ratings: 150 kHz – 800 kHz

Primary isolated power supply DC rectifier
No High Frequency output transformer

50 kW HF Module using MOSFETs


The ThermaView™ diagnostics package is a microprocessor based graphical software that gives mill operators and maintenance technicians a constant display of weld parameters in addition to easy-to-use trouble shooting indicators. A powerful preventative maintenance tool, ThermaView™ provides indication of welder status and operation.

Genuine Thermatool™ tooling including induction coils and impeders ensure full weld power output and reliable operation. Thermatool™ CFI induction coils are proven, standard designs  for long-life and optimized matching between the welder and the range of loads presented by different diameter and wall thickness combinations produced on a mill. Impeders and impeder booster pumps are available to minimize power used during welding and increase the efficiency of the welding process by ensuring that power is directed down the vee.