Gradient or Lab Strand Annealing Furnaces

The furnace chamber of the gradient furnace GR 1300/13 is divided in six control zones of equal length. The temperature in each of the six heating zones is separately controlled. The gradient furnace is usually charged from the side through the parallel swivel door. A maximum temperature gradient of 400 °C can then be stabilized over the heated length of 1300 mm. On request the furnace also is designed as a lab strand annealing furnace with a second door on the opposite side. If the included fiber separator are used charging is carried-out from the top.



Category: .
  • Tmax 1300 °C
  • Heated length: 1300 mm
  • Heating elements on support tubes providing for free heat radiation in the kiln chamber
  • Charging from the top or through the right side door
  • Gas damper suspension of the lid
  • 6-zone control
  • Separate control of heating zones (each 160 mm long)
  • Temperature gradient of 400 °C over the entire length of the kiln chamber, each zone can individually be controlled
  • Fiber separators dividing the chamber in six equally sized chambers
  • Defined application within the constraints of the operating instructions
  • Additional equipment
  • Up to ten control zones
  • Second parallel swivel door for use as lab strand annealing furnace
  • Vertical instead of horizontal strand furnace
  • Process control and documentation via Nabertherm Control Center (NCC) for monitoring, documentation and control
Model Tmax Inner dimensions in mm Outer dimensions in mm Connected Electrical Weight
  °C w d h W D H load kW connection* in kg
GR 1300/13 1300 1300 100 60 1660 740 1345 18 3-phase 300
Article No. Description
Exhaust systems/Accessories
631000140 Chimney for connection to an exhaust pipe
631000812 Chimney with fan, to remove exhaust gas from the furnace better.
631000166 Catalytic converter with fan for removal of organic components from the exhaust air.
699000408 Round saggar (Ø 115 mm x 35 mm) for furnaces LHT/LB, Tmax 1650 °C
699000984 Round lid for furnaces LHT/LB, Tmax 1650 °C
699000279 Square saggar for furnaces HTC and LHT, Tmax 1600 °C
699000985 Square lid for furnaces HTC and LHT, Tmax 1600 °C
493000002 Various tongs for easy loading and unloading of the furnace. (300mm)
493000003 Various tongs for easy loading and unloading of the furnace. (500mm)