Thermal Process Technology /
Top Hat Furnaces or Bottom Loading Furnaces with Wire Heating up to 1400 °C

Top Hat Furnaces or Bottom Loading Furnaces with Wire Heating up to 1400 °C

Top hat furnace plant with three exchangeable tables and protective gas boxes for heat treatment with non-flammable protective or reaction gases Top hat furnace H 500 with catalytic post combustion system, automatic table changing system and security scanners to protect the danger zone

Production plant, consisting of 3 top hat furnaces HAS 1560/95S with sealed housing for operation with nitrogen. Including air/gas heat exchanger for reduced cooling times

Top hat furnace H 1600/14

Top hat furnace system H 245/LTS with cooling station and table changing system

Kiln furniture for small ceramics components

Top hat furnaces and bottom loading 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 top hat. 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 top hat 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
  • Top hat furnaces: electrohydraulically driven hat with fixed table
  • Bottom loading furnaces: driven table and fixed hat
  • 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
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Tmax to 1400  °C
  • Motor driven exhaust air flap, switchable via the program
  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Protective gas connection for purging the furnace with non-flammable protective or reaction gases
  • Manual or automatic gas supply systems
  • Multi-zone control adapted to the particular furnace provides model for optimal the temperature uniformity
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Additional tables, table changing system, also motor-driven
  • Exhaust air and exhaust gas piping
  • Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating
power inElectricalWeight
 °Cwdhin lWDHkW1connection*in kg
H 125/LB, LT1280800400400125155015002200123-phase1250
H 250/LB, LT12801000500500250153017002300183-phase1400
H 500/LB, LT12801200600600500202018002500363-phase1800
H 1000/LB, LT128016008008001000220020002900483-phase2800
H 1350/LB, LT128028006207801360375020503050753-phase3500
H 3000/LB, LT128030001000100030004000210032001403-phase6200
1Depending on furnace design connected load might be higher *Please see page 81 for more information about supply voltage