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Lift-Top Furnaces Electrically Heated

 
  H 1000/S with table changing system HG 5208/S with exchangable table for heat treatment of large parts and charging the furnace with the help of a shop crane.

H 1000/LB

Lift-top furnace with recesses for extending charges

Lift-top furnace plant with three exchangeable tables and protective gas boxes for heat treatment with non-flammable protective or reaction gases

H 125/LB or LT - H 3000/LB or LT

Lift-top furnaces have the advantage that they are highly accessible for charging. The heating from all four sides and the table provides for very uniform temperatures. The basic furnace is equipped with a fixed table under the hood. The system can be expanded by adding one or several exchangeable tables which can be driven manually or motorically. Another option is to remove the hood completely with a shop crane. In such cases, the furnace heating system has a plug-in power supply.

  • Tmax 1280  °C
  • Dual shell housing with rear ventilation for low shell temperatures
  • Electrohydraulically driven hood with fixed table
  • Five-sided heating from all four sides and from the table provides for a temperature uniformity up to +/- 10 °C according to DIN 17052-1
  • Heating elements mounted on support tubes provide for free radiation and long service life of the heating wire
  • Bottom heating protected by SiC tiles which provide for a level stacking surface
  • Multi layer insulation consisting of lightweight refractory bricks backed by special insulation
  • Long-life ceiling design with fiber insulation
  • Manual exhaust air flap on the furnace roof
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Multi-zone control adapted to the particular furnace provides model for optimal the temperature uniformity
  • Additional tables, table changing system, also motor driven
  • Hood, removable by customer's crane, hood heating connected with plug-in power supply
  • Commissioning of the furnace with test firing and temperature uniformity measurement using 11 thermocouples including record of the measurement results
  • Process control and documentation with Controltherm MV software package, NTLog and NTGraph or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeight
 °Cwdhin lWDHpower in kW1connection*in kg
H 125/LB, LT 1280 800 400 400 125 1550 1500 2200 12 3-phase 1250
H 250/LB, LT 1280 1000 500 500 250 1530 1700 2300 18 3-phase 1400
H 500/LB, LT 1280 1200 600 600 500 2020 1800 2500 36 3-phase 1800
H 1000/LB, LT 1280 1600 800 800 1000 2200 2000 2900 48 3-phase 2800
H 1350/LB, LT 1280 2800 620 780 1360 3750 2050 3050 75 3-phase 3500
H 3000/LB, LT 1280 3000 1000 3000 3000 4000 2100 3200 140 3-phase 6200
1Depending on furnace design connected load might be higher *Please see page 76 for more information about supply voltage

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