Forced Convection Bogie Hearth Furnaces electrically heated or gas-fired

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.

Process Control

Function and equipment

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The forced convection bogie hearth furnaces W 1000/60A - W 8300/85A are used when heavy charges weighing 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 bogie hearth 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. Bottom heating protected by SiC tiles.
  • Perforated sheet support or charging grid on the bogie for even load distribution
  • High-performance air circulation fan with vertical circulation
  • Temperature uniformity up to +/−  5 °C according to DIN 17052-1
  • 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
  • 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 adjustable cutout temperature as temperature limiter to protect the furnace and load
  • Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumino silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
  • Defined application within the constraints of the operating instructions
  • Controller with touch operation B500 (5 programs with 4 segments each)
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive
  • Freeware NTEdit for convenient program input via ExcelTM for WindowsTM on the PC
  • Freeware NTGraph for evaluation and documention of firings using ExcelTM for WindowsTM on the PC
  • MyNabertherm App for online monitoring of the firing on mobile devices for free download

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 see page 94
  • Different possibilities for an extension to a bogie hearth furnace plant:
    • 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
  • Motorized fresh-air and exhaust air flaps, adjustable via the program
  • Cooling systems for faster rapid cooling
  • Bar supports with grids for higher charge weights and/or better load distribution with point leads
  • Process control and documentation via VCD software package for monitoring, documentation and control

Technical specifications

Model Tmax Inner dimensions in mm Volume Max. charging weight Outer dimensions1 in mm Heating power Electrical
  °C w d h in l in kg W D H in kW2 connection
W 1000/.. A 600 800 1600 800 1000 800 1780 2450 2350 48 3-phase
W 1600/.. A 600 1000 1600 1000 1600 1000 1920 2450 2510 48 3-phase
W 2200/.. A 600 1000 2250 1000 2200 1500 1980 3100 2560 96 3-phase
W 3300/.. A 600 1200 2250 1200 3300 1900 2180 3100 2750 96 3-phase
W 4000/.. A 600 1500 2250 1200 4000 2400 2480 3100 2800 120 3-phase
W 4800/.. A 600 1200 3300 1200 4800 2800 2180 4380 2850 120 3-phase
W 6000/.. A 600 1500 3300 1200 6000 3700 2480 4380 2900 144 3-phase
W 6600/.. A 600 1200 4600 1200 6600 4000 2280 5680 2780 144 3-phase
W 7500/.. A 600 1400 3850 1400 7500 4000 2380 4930 3020 144 3-phase
W 8300/.. A 600 1500 4600 1200 8300 5200 2580 5680 2950 192 3-phase
                       
W 1000/.. A 850 800 1600 800 1000 800 1780 2450 2350 45 3-phase
W 1600/.. A 850 1000 1600 1000 1600 1000 1920 2450 2510 45 3-phase
W 2200/.. A 850 1000 2250 1000 2200 1500 1980 3100 2560 90 3-phase
W 3300/.. A 850 1200 2250 1200 3300 1900 2180 3100 2750 90 3-phase
W 4000/.. A 850 1500 2250 1200 4000 2400 2480 3100 2800 110 3-phase
W 4800/.. A 850 1200 3300 1200 4800 2800 2180 4380 2850 110 3-phase
W 6000/.. A 850 1500 3300 1200 6000 3700 2480 4380 2900 140 3-phase
W 6600/.. A 850 1200 4600 1200 6600 4000 2280 5680 2780 140 3-phase
W 7500/.. A 850 1400 3850 1400 7500 4000 2380 4930 3020 140 3-phase
W 8300/.. A 850 1500 4600 1200 8300 5200 2580 5680 2950 185 3-phase
1External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
2Depending on furnace design connected load might be higher

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