The chamber furnace systems LH 15/12 - LH 60/12 have proven themselves for many years as professional chamber furnaces. For stress relief annealing after laser sintering, the furnaces are equipped with a protective gas box for non-flammable protective gas, e.g. argon, and an automatic gas supply system for flow rates of 4 l – 50 l/min. The design with gas supply box is a cost-effective alternative to retort furnaces and is suitable for many processes. The batch to be annealed is wrapped in annealing/hardening foil during the process to protect it from oxidation and decarburization. To protect the bottom insulation of the furnace from mechanical stress, a charging plate is required when using a gas supply box.
- Tmax 1200 °C
- Recommended operating temperatures up to 1100 °C, at operating temperatures up to 1150 °C increased wear of the protective gas box must be expected
- 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
- Dual shell housing made of textured stainless steel sheets with additional fan cooling for low surface temperature
- Multi-layered insulation of light refractory bricks and special backup insulation
- 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.
- Motorized exhaust air flap
- Adjustable air inlet in furnace floor
- Base included
- Protective gas boxes for inert gas atmosphere with additional thermocouple, type K
- Automatic gas supply system for flow rates of 4 l – 50 l/min
- Charge control for measuring the temperature directly at the load in the gas supply box
- Charging plate and annealing and hardening foils
- Controller with touch operation P570 (50 programs with each 40 segments)
- MyNabertherm App for online monitoring of the firing on mobile devices for free download
- Freeware NTEdit for convenient program input via MS Excel on the PC
- Freeware NTGraph for evaluation and documention of firings using MS Excel on the PC
- NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive
- Defined application within the constraints of the operating instructions
Additional equipment
- Process control and documentation via VCD software package for monitoring, documentation and control
| Model | Tmax furnace |
Inner dimensions protective gas box in mm | Outer dimensions in mm3 |
Process flush rate | Heating power | Electrical | Weight | Heating time | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| in °C | w | d | h | W | D | H | l/min | in kW | connection | in kg | in min2 | |
| LH 15/12 System | 1200 | 100 | 100 | 100 | 680 | 860 | 1230 | 10 - 15 | 5.0 | 3-phase1 | 170 | 44 |
| LH 30/12 System | 1200 | 170 | 170 | 170 | 710 | 930 | 1290 | 10 - 15 | 7.0 | 3-phase1 | 200 | 60 |
| LH 60/12 System | 1200 | 250 | 250 | 250 | 790 | 1080 | 1370 | 10 - 15 | 8.0 | 3-phase | 300 | 85 |
| 1Heating only between two phases 2Heating time of the empty and closed furnace up to Tmax −100 K (connected to 230 V 1/N/PE rsp. 400 V 3/N/PE) 3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request. |
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US 18983 
GB 13895 
CA 11584 
AU 10561 
IE 3964 
NZ 2451 
BR 1817 
IN 1211 
