Induction Melting Furnace, Low-Frequency, 25kW
SKU Description Max Input Power Electrical Quantity Price Add to Cart
IHL25K Induction Melting Furnace, Low Frequency 25 kW 460 V, 50/60Hz, 3-phase 1 Each
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The IHL series 1 kHz to 20 kHz low frequency induction heaters are good for a wide range of applications including deep heat penetration for full hardening processes, steel rod forging, tempering of pressing dies, pre-heating for welding, and melting of metal batches over 4 lbs. They are not limited to ferromagnetic materials, so nonferrous metals can also be used effectively.

There are three major components to the system: the power supply, the compensating capacitor/transformer and the induction coil/smelting crucible. Our heaters automatically adjust to the best resonant frequency in order to achieve the most efficient overall heating results based on our customer's requirements which include heat penetration, heating efficiency, operating noise and electromagnetic homogeneity. Two of our most popular low frequency machines are the Melting Furnaces with Tile-Pour Melter and Auto-feeding Rod Heating Furnaces for Forging.

Safety Features

Overvoltage protection: machine shuts down when input voltage is over 245V. Overvoltage light will turn on and buzzer will sound continuously. Alarm and light shut off automatically when voltage goes below 245V.

Overheat protection: if sensor detects IGBT heat sink temperature is over 55⁰C, machine will shut down, overheat light will turn on and buzzer will sound continuously. Increase water pressure or lower water temperature until alarm goes off itself.

Overcurrent/malfunction protections: machine will shut down, indicator light will turn on and buzzer wil sound continuously if one of these situations occurs:

  • One of the machine parts becomes overheated
  • Interfering signal detected
  • Short circuit between work pieces and induction coils
  • Machine malfunctions
  • Induction coils touching each other
  • Input voltage is too low

Low water pressure protection: if water pressure goes below 29 PSI.

Other Features

  • Digital output, frequency and current displays
  • Automatic and manual modes
  • Comes with one graphite crucible. Additional crucibles available at extra cost
  • ISO 9001:2008 registered manufacturer


  • Always wear protective gear and goggles when operating the machine. Crucibles must be covered all the time during operation. Across International is not responsible for any injury or damage caused by misuse.
  • Do not run no-load operation for a long period of time, it might cause damage to the machine.
  • Circulating water must be pure, clean and below 45C.
  • Machine must be grounded properly all the time during operation.


Model IHL25K
Max. input current 31 A (min. 40A 3-phase circuit breaker required)
Power 460 VAC 50/60Hz three phase
Power cord 6-gauge 4-conductor Max 45A (6/4 SOOW for 3 PH system)
Output frequency 1-20 KHz (actual frequency depends on type, size of work pieces and heating requirements)
Input power 25 KW
Output current 5-45 A
Output voltage 70-550 V
Duty cycle 100% (24-7 continuous working)
Water pressure ≥ 0.2 Mpa (29 PSI) you may use tap water and water pump (>1/4HP & >240 Gph)
Water flow > 1.6 gallons (6 liters) per minute
Unit Dimensions Power supply: 55 Lb, 18 x 10 x 18"
Transformer: 18 x 10 x 17"
Tilt-pour: 26 x 22 x 27"
Graphite crucible: 6.7" OD, 7.9" height
Shipping Dimensions 30 x 26 x 26" (induction heaters)
43 x 27 x 35" (tilt-pour)
Shipping Weight 180 Lb (induction heaters)
220 Lb (tilt-pour)
Max. melting capacity 22-44 Lb (copper, silver, gold), 17 Lb (steel), 8 Lb (aluminum)

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