Top Hat Furnaces or Bottom Loading Furnaces with Molybdenum Disilicide Heating Elements up to 1800 °C

Bottom loading furnace HT 166/17 LB Bottom loading furnace HT 500/17 LB

Heat from all sides and between the stack to optimize temperature uniformity

Heating elements arranged one above the other for tall structures

Top hat furnace HT 276/18 LTS with two inner process hoods for sintering under non-flammable protective or reaction gases

Measurement setup to determine the temperature uniformity in a high-temperature bottom loading furnace

Top hat furnace HT 276/17 LT with manual table changing system

High-temperature top hat furnace HT 2600/16 LT DB200 for production

High-temperature furnace HT 273/17S with table by transportable fork lift

Top hat furnace HT 750/18 LTS

For charging complex settings we recommend top hat furnaces or bottom loading furnaces. Also small workparts can be conveniently loaded on different layers.

The basic furnace comes with one table. Depending on the technical requirements are equipped, a top hat furnace or a bottom loading furnace will be the choice. The system can be expanded with one or more changeable tables, either manually or electrically driven. Other additional equipment, like controlled cooling systems to short process cycles or the addition of a debinding package for debinding and sintering in one process provide for tailored solution for individual needs.

  • Tmax 1600  °C, 1750  °C or 1800  °C
  • Dual shell housing with fan cooling provides for low shell temperatures
  • Top hat furnaces: electrohydraulically driven top hat with fixed table
  • Bottom loading furnaces: driven table and fixed top hat
  • Gently running, low-vibration spindle drive or electrohydraulic drive for larger models
  • Safe and tight closing of the furnace by means of labyrinth seal
  • Heating from all four sides provides for good temperature uniformity
  • High-quality fiber insulation backed by special insulation
  • Side insulation constructed with tongue and groove blocks provides for low heat dissipation to the outside
  • Long-life roof insulation with special suspension
  • Furnace table with special bottom reinforcement to accommodate high charge weights
  • Motor-driven exhaust air flap in the furnace roof, switchable at the program
  • Heating elements switched via SCR‘s
  • 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

  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Furnace in DB design featuring fresh air preheating, exhaust gas ventilation and an extensive safety package for debinding and sintering in one process, i. e. without transfering the material from the debinding furnace to the sintering furnace
  • Stainless steel exhaust gas hoods
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Temperature measurement with thermocouples, types B and type S with automatic pull-out device for precise control results in the low temperature range
  • Special heating elements for zirconia sintering provide for longer service life with respect to chemical interaction between charge and heating elements
  • Heat from all sides and between the stack or with heating elements, positioned above each other to optimize temperature uniformity
  • Protective gas connection for purging the furnace with non-flammable protective or reaction gases
  • Manual or automatic gas supply systems
  • Inner process box to improve the gas tightness and to protect the furnace chamber against contamination
  • Bottom insulation made of durable lightweight refractory bricks for heavy charge weights
  • Gas supply system in the furnace chamber with ceramic bell jar, protective gas inlet and outlet from below for better sealing when operating with protective gases and/or to prevent from chemical interactions between the load and the insulation or the heating elements
  • Alternative table changing systems
  • Exhaust air and exhaust gas piping
  • Thermal or catalytic exhaust cleaning systems
  • FID measurement for process optimization
  • 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
HT 64/16 LB, LT160040040040064110017502400363-phase1100
HT 166/16 LB, LT1600550550550166135020602600423-phase1500
HT 276/16 LB, LT16001000500550276180021002600693-phase1850
HT 400/16 LB, LT16001200600550400190022002680693-phase2600
HT 500/16 LB, LT16001550600550500210022002680693-phase2700
HT 1000/16 LB, LT160010001000100010001800290034501403-phase3000
HT 1030/16 LB, LT1600220060078010302950250030501603-phase3200
HT 64/17 LB, LT175040040040064110017502400363-phase1100
HT 166/17 LB, LT1750550550550166135020602600423-phase1500
HT 276/17 LB, LT17501000500550276180021002600693-phase1850
HT 400/17 LB, LT17501200600550400190022002680693-phase2600
HT 500/17 LB, LT17501550600550500210022002680693-phase2700
HT 1000/17 LB, LT175010001000100010001800290034501403-phase3000
HT 1030/17 LB, LT1750220060078010302950250030501603-phase3200
HT 64/18 LB, LT180040040040064110017502400363-phase1100
HT 166/18 LB, LT1800550550550166135020602600423-phase1500
HT 276/18 LB, LT18001000500550276180021002600693-phase1850
HT 400/18 LB, LT18001200600550400190022002680693-phase2600
HT 500/18 LB, LT18001550600550500210022002680693-phase2700
HT 1000/18 LB, LT180010001000100010001800290034501403-phase3000
HT 1030/18 LB, LT1800220060078010302950250030501603-phase3200
1Depending on furnace design connected load might be higher *Please see page 73 for more information about supply voltage