Termikus folyamattechnika

Chamber Furnaces with Brick Insulation or Fiber Insulation

Chamber furnace LH 216/12SW with scale to measure weight reduction during annealing

LH 60/12 with manual lift door and protective gas box for non-flammable protective or reactive gases

Chamber furnace LH 30/14

Cooling fan in combination with motor-driven exhaust air flap to reduce cooling time

Chamber furnace LH 30/12 with manual lift door

The chamber furnaces LH 15/12 - LF 120/14 have been trusted for many years as professional chamber furnaces. These furnaces are available with either a robust insulation of light refractory bricks (LH models) or with a combination insulation of refractory bricks in the corners and low heat storage, quickly cooling fiber material (LF models). With a wide variety of optional equipment, these chamber furnaces can be optimally adapted to your processes.

  • Tmax 1200 °C, 1300 °C, or 1400 °C
  • Dual shell housing with rear ventilation, provides for low shell temperatures
  • High furnace chamber with five-sided heating for very good temperature uniformity
  • Heating elements on support tubes ensure free heat radiation and a long service life
  • Controller mounted on furnace door and removable for comfortable operation
  • Protection of bottom heating and flat stacking surface provided by embedded SiC plate in the floor
  • LH models: multi-layered, fiber-free insulation of light refractory bricks and special backup insulation
  • LF models: high-quality non-classified fiber insulation with corner bricks for shorter heating and cooling times
  • Door with brick-on-brick seal, hand fitted
  • Short heating times due to high installed power
  • Self-supporting arch for high stability and greatest possible protection against dust
  • Quick lock on door
  • Motor driven exhaust air flap
  • Freely adjustable air slide intake in furnace floor
  • Base included
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Parallel swinging door, pivots away from operator, for opening when hot
  • Lift door with electro-mechanic linear drive
  • Separate wall-mounting or floor standing cabinet for switchgear
  • Cooling fan for shorter cycle times
  • Protective gas connection to purge with non-flammable protective or reaction gases
  • Manual or automatic gas supply system
  • Scale to measure weight reduction during annealing
  • Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeight
 °Cwdhin lWDHpower in kW2connection*in kg
LH 15/1212002502502501568086012305.03-phase1170
LH 30/1212003203203203071093012907.03-phase1200
LH 60/12120040040040060790108013708.03-phase300
LH 120/1212005005005001208901180147012.03-phase410
LH 216/1212006006006002169901280159020.03-phase450
            
LH 15/1313002502502501568086012307.03-phase1170
LH 30/1313003203203203071093012908.03-phase1200
LH 60/131300400400400607901080137011.03-phase300
LH 120/1313005005005001208901180147015.03-phase410
LH 216/1313006006006002169901280159022.03-phase460
            
LH 15/1414002502502501568086012308.03-phase1170
LH 30/14140032032032030710930129010.03-phase1200
LH 60/141400400400400607901080137012.03-phase300
LH 120/1414005005005001208901180147018.03-phase410
LH 216/1414006006006002169901280159026.03-phase470
            
LF 15/1313002502502501568086012307.03-phase1150
LF 30/1313003203203203071093012908.03-phase1180
LF 60/131300400400400607901080137011.03-phase270
LF 120/1313005005005001208901180147015.03-phase370
            
LF 15/1414002502502501568086012308.03-phase1150
LF 30/14140032032032030710930129010.03-phase1180
LF 60/141400400400400607901080137012.03-phase270
LF 120/1414005005005001208901180147018.03-phase370
1Heating only between two phases *Please see page 89 for more information about supply voltage
2Depending on furnace design connected load might be higher
 

Protective Gas Boxes for Models LH 15/.. - LH 216/..

Protective gas box for furnaces with hinged door

Due to the cubic interior of the LH chamber furnaces and the corresponding protective gas boxes, these furnaces are ideally suited for higher batches. Gassing boxes for the LH models have a standard charge thermocuple, which can be used, for example, for charge control. The protective gas inlet and outlet is routed through the furnace collar in the case of a furnace with a swivel door on the left and through the lower furnace collar in the lift-door configuration.

These boxes have a lid for charging from above, protective gas inlet and outlet.

  • Tmax 1100 °C
  • For non-combustible protective and reactive gases argon, nitrogen and forming gas (observe national regulations)
  • Protective gas box with fiber seal and cover with locks, inert gas introduction via a pipe into the bottom of the box
  • Protective gas connection via quick coupling with hose connector (inner diameter 9 mm)
  • Piping for gas inlet and outlet through the furnace collar
  • Heat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)
  • Charge thermocouple type K for temperature display or charge control

Additional equipment

  • Starting from LH 30/.. a charging cart is recommended
  • Digital temperature display
  • Gas supply systems
  • Extended gas piping for the use of smaller boxes in larger furnace models
  • Draw hook
  • Charging stacker
Article no.FurnaceInner dimensions in mmOuter dimensions in mm1Charging method
  wdhWDHof the box
631001276LH 15/..100100100165182166draw hook
631001277LH 30/..170170170235252236draw hook
631001278LH 60/..250250250315332316draw hook
631001279LH 120/..350350350415411441draw hook
631001280LH 216/..450450400514535554charging stacker
Article no. 601655055, 1 set of fiber insulation cord, 5 strips of 610 mm each1 Without piping
Work space = box inner dimensions: - 30 mm to all sides
Larger boxes and custom dimensions available upon request
 

Protective gas box which stays in the furnace
Protective Gas Boxes with Charging from the Front

Design as the described protective gas boxes, but with charging from the front. These protective gas boxes remain in the oven and are equipped with a lid that can be opened to the front. After the lid has been opened, the batch can be removed directly.

Article no.FurnaceInner dimensions in mmOuter dimensions in mm1Charging method
  wdhWDHof the box
631001310LH 15/..100100100170148194-
631001311LH 30/..170170170240218264-
631001312LH 60/..250250250320298344-
631001313LH 120/..350350350420398444-
Article no. 601655055, 1 set of fiber insulation cord, 5 strips of 610 mm each1 Without piping
Work space = box inner dimensions: - 30 mm to all sides
Larger boxes and custom dimensions available upon request
 

Protective Gas Boxes with Evacuation Lid for Models LH 15/.. - LH 216/..

Protective gas box with evacuation lid

Design as the described protective gas boxes, but with an additional evacuation lid. In order to reduce the residual oxygen in the box, protective gas boxes with evacuation lids can be used. These boxes have a lid for top loading, a protective gas inlet and outlet, and an evacuation cover with rubber gasket. The gas piping and the handling in the warm state corresponds to the gassing boxes on page 56. In addition, a connection for a vacuum pump via three-way ball valve is provided. In combination with a vacuum pump, the oxygen is evacuated from the box in cold state and afterwards flushed with protective gas. Repeating the process once or several times will significantly improve the results. After this process, the evacuation cover is removed and the actual heat treatment process is started under protective gas. After the heat treatment, the box is pulled out of the furnace and can be cooled in air or opened for batch removal.

  • Protective gas box with fiber sealing and lid with locks, recess for evacuation lid, gas inlet via a pipe into the bottom of the box
  • Evacuation lid with rubber sealing (Elastomer) and manometer
  • Protective gas connection via threeway ball valve and quick coupling with hose connector (inner diameter 9 mm)

Additional equipment

  • Starting from LH 30/.. a charging cart is recommended
  • Digital temperature display
  • Vacuum pump
  • Gas supply systems
  • Extended gas piping for the use of smaller boxes in larger furnace models
  • Draw hook
  • Charging stacker
Article no.FurnaceInner dimensions in mmOuter dimensions in mm1Charging method
  wdhWDHof the box
631001281LH 15/..100100100152180160draw hook
631001282LH 30/..170170170222252230draw hook
631001283LH 60/..250250250302332310draw hook
631001284LH 120/..350350350402432405draw hook
631001285LH 216/..450450400506535540charging stacker
Article no. 601655055, 1 set of fiber insulation cord, 5 strips of 610 mm each1 Without piping
Work space = box inner dimensions: - 30 mm to all sides
Larger boxes and custom dimensions available upon request
 

Charging plates for Models LH 15/.. - LH 216/..

Charging plate

Charging plates are recommended to protect the furnace floor. The charging plates are particularly suitable for heat treatment with protective gas boxes in order to minimize wear during charging.

  • Tmax 1100 °C
  • Threeside upstand
  • Heat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)
  • With spacer o the rear heating elements
Article no.FurnaceOuter dimensions in mm
  WDH
 
628002013LH 15/..19023030
628002014LH 30/..26030030
628002015LH 60/..34040030
628002016LH 120/..44050030
628002017LH 216/..54060030