25KW Low-Frequency Induction Melting Furnace 1-20KHz

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480V 3PH, maximum metling capacity: 44 Lb. Comes with separate manual tilt-pour melter


SKU: 286 Category: Brand:

Note: This model only available in 460-480 volt three-phase.

Across International's 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.

Main Features

  • Ease of use: just plug in the power and connect the cooling system. Our simple instruction allows you to use the heater in 15 minutes.
  • Digital output, frequency and current displays.
  • Dual automatic and manual modes.
  • Comes with one graphite or silica crucible. Additional crucibles available at extra cost. (melting material decides crucible type, weight and size of the material decide crucible size)
  • ISO 9001:2008 registered manufacturer.

Safety Features

  • Overvoltage protection: machine shuts down when input voltage is over 495V. Overvoltage light will turn on and buzzer will sound continuously. Alarm and light shut off automatically when voltage goes below 495V.
  • Overheat protection: if sensor detects heat radiator temperature is over 55°C, 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 turned on and buzzer sounds continuously if one of these situations occurs:
    • One of the machine parts becomes overheated
    • Interfering signal detected
    • Short circuit between workpieces 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, machine will shut down, water protection light will turn on and buzzer will sound continuously.


  • 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 45°C.
  • Machine must be grounded properly all the time during operation.


 Max. input current  31 A (min. 47A 3-phase circuit breaker required)
 Power  460 VAC 50/60Hz three phase (380V available upon request)
 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 (DxWxH)
 Power supply: 55 Lb, 18 x 10 x 18"
 Transformer: 18 x 10 x 17" (or 19 x 16 x 17", depends on requirements)
 Tilt-pour: 26 x 22 x 27" (or 26 x 24 x 37", upon request)
 Graphite crucible: 6.7" OD, 7.9" height
 Optional 4P chiller: 37 x 22 x 54"
 Shipping dimensions (DxWxH)  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)
 See melting point of various metals and alloys


Standard package

 Part description


 Part image

 IHL25K power supply and capacitor
1 set

 Tilt-pour melter with one removeable graphite or silica crucible 1 set
 Power cable btw power supply & capacitor x 1
 Temp cable btw power supply & capacitor x 1
 Water cooled cable btw capacitor & melter x 2
4 pcs
 Remote on/off switch 1 pc  
 Water cooling fitting
 1 set

 Stainless steel hose clamp
1 set

 Fuse 1 set

 Operation manual  1 pc

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