Air Circulation Bogie Hearth Furnaces Electrically Heated or Gas-Fired

Air circulation bogie hearth furnace W 5290/85 AS with annealing box for heat treatment of coils under protective gas W 4000/60AS with charging basket made of 1.4828

W 10430/85AS

Cooling fan for accelerated cooling

Charge support in an air circulation bogie hearth furnace for 850 °C

Air circulation bogie hearth furnace for heat-treating coils

W 13920/60AS4 with floor grid for heavy loads

The air circulation bogie hearth furnaces W 1000/60A - W 8300/85A are used when heavy charges weighing up to more than 25 t have to be heat-treated. They are ideal for processes such as solution annealing, artificial ageing, annealing or soft annealing, for which a high degree of temperature uniformity is crucial. The high-performance air circulation assures that the temperature uniformity achieved throughout the work space is outstanding. A broad selection of additional equipment enables these furnaces to be optimally adapted to suit specific processes.

  • Tmax 600  °C or 850  °C
  • Dual shell housing with rear ventilation provides for low shell temperatures for the 850  °C models
  • Swing door hinged on the right side
  • Heating from chrome steel heating elements for the 600  °C models
  • Heating from three sides (both side walls and the trolley) for the 850  °C models
  • High-performance air circulation fan with vertical circulation
  • Temperature uniformity up to ∆T 10 K according to DIN 17052-1
  • Bottom heating protected by SiC tiles on the bogie providing level stacking surface for the 850  °C models
  • Furnace chamber fitted with inner sheets made of stainless steel 1.4301 for 600  °C models and of 1.4828 for 850  °C models
  • Insulation structured with high-quality mineral wool for 600  °C models
  • Insulation made of high-quality, non-classified fiber material for 850  °C models
  • Bogies with flanged wheels running on rails for easy and precise movement of heavy loads
  • Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads from model W 4800
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

  • Direct gas heating or upon request with indirect gas heating with radiation tube
  • Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads up to Model W 4000
  • Optimization of the temperature uniformity up +/- 3 °C according to DIN 17052-1
  • Bogie running on steel wheels with gear rack drive, no rails in front of the furnace necessary
  • Different possibilities for an extension to a bogie hearth furnace system:
    • Additional bogies
    • Bogie transfer system with parking rails to exchange bogies running on rails or to connect multiples furnaces
    • Motor-driven bogies and cross-traversal system
    • Fully automatic control of the bogie exchange
  • Electro-hydraulic lift door
  • Motor-driven exhaust air flaps, adjustable via the program
  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Multi-zone control adapted to the particular furnace model provides for optimum temperature uniformity in the 850  °C models
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Designed for Tmax 950  °C, fan blade driven indirectly via a belt to protect the air recirculation motor against over-heating
  • Process documentation and control with Controltherm MV software package, NTLog and NTGraph for the basic furnace or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating powerElectrical
 °Cwdhin lWDHin kW1connection
W 1000/.. A 8001600800100018002390230550.03-phase
W 1600/.. A 100016001000160020002390253550.03-phase
W 2200/.. A 100022501000220020003040253595.03-phase
W 3300/.. A600120022501200330022003040274595.03-phase
W 4000/.. Aor1500225012004000250030402780120.03-phase
W 4800/.. A8501200330012004800220040902780120.03-phase
W 6000/.. A 1500330012006000250040902900156.03-phase
W 6600/.. A 1200460012006600220053902770152.03-phase
W 7500/.. A 1400385014007500240046402980154.03-phase
W 8300/.. A 1500460012008300250053902780203.03-phase
1Depending on furnace design connected load might be higher