Forced Convection Bogie Hearth Furnaces

They are ideal for processes such as solution like glass tempering or cooling from glass, for which a good temperature uniformity is crucial.

Process Control

Function and equipment

W19150
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W3300_85A.png
Kuehlgeblaese
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Chargenauflage

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 like glass tempering or cooling from glass, for which a good 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
  • Bottom heating protected by SiC tiles on the bogie providing level stacking surface for the 850  °C models
  • Insulation structured with high-quality mineral wool for 600  °C models
  • 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.
  • 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 oven and load
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive
  • Controller with touch operation B500 (5 programs with 4 segments each)

Additional equipment

  • 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
  • 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
    • Motorized 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 more rapid cooling
  • Bar supports or grids for higher charge weights and/or better load distribution
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control

Technical specifications

ModelTmaxInner dimensions in mmVolumeMax. charging weightOuter dimensions1 in mmHeating powerElectrical
 °Cwdhin lin kgWDHin kW2connection
W 1000/.. A60080016008001000800178024502350483-phase
W 1600/.. A60010001600100016001000192024502510483-phase
W 2200/.. A60010002250100022001500198031002560963-phase
W 3300/.. A60012002250120033001900218031002750963-phase
W 4000/.. A600150022501200400024002480310028001203-phase
W 4800/.. A600120033001200480028002180438028501203-phase
W 6000/.. A600150033001200600037002480438029001443-phase
W 6600/.. A600120046001200660040002280568027801443-phase
W 7500/.. A600140038501400750040002380493030201443-phase
W 8300/.. A600150046001200830052002580568029501923-phase
            
W 1000/.. A85080016008001000800178024502350453-phase
W 1600/.. A85010001600100016001000192024502510453-phase
W 2200/.. A85010002250100022001500198031002560903-phase
W 3300/.. A85012002250120033001900218031002750903-phase
W 4000/.. A850150022501200400024002480310028001103-phase
W 4800/.. A850120033001200480028002180438028501103-phase
W 6000/.. A850150033001200600037002480438029001403-phase
W 6600/.. A850120046001200660040002280568027801403-phase
W 7500/.. A850140038501400750040002380493030201403-phase
W 8300/.. A850150046001200830052002580568029501853-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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