Function and equipment
Protective gas box with insertations
Forced convection chamber furnace N 250/85 HA with protective gas box
Protective gas box with extended piping for usage in a large furnace model
For the heat treatment, workpieces are placed in the box, the lid is locked using the sealing locks and flushed with protective gas outside the furnace for some time and then placed in the furnace. Depending on the weight, a charging cart (page 30) is recommended.
Basic Version
- 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
- Models NA 250/.. und NA 500/.. will be delivered without bootom frame sheet
- Heat-resistant alloy: 309 (AISI)/(DIN material no. 1.4828)
- Charge thermocouple type K for temperature display or charge control
Additional equipment
Additional equipment
- Digital temperature display
- Gas supply systems
- Extended gas piping for the use of smaller boxes in larger furnace models
- Draw hook
- Charging cart
Technical specifications
Article no. | Furnace | Inner dimensions in mm | Outer dimensions in mm1 | Charging method | |||||
---|---|---|---|---|---|---|---|---|---|
(Furnace with hinged door) | (Furnace with lift door) | w | d | h | W | D | H | of the box | |
631000411 | 631000764 | NA 60/.. | 270 | 420 | 260 | 336 | 460 | 340 | draw hook |
631000412 | 631000765 | NA 120/.. | 350 | 520 | 340 | 436 | 560 | 430 | draw hook |
631000413 | 631000766 | NA 250/.. | 480 | 630 | 460 | 546 | 680 | 600 | charging stacker |
631000414 | 631000767 | NA 500/.. | 630 | 780 | 610 | 696 | 836 | 760 | charging 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 |
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Further products

Catalog
A complete overview of our extensive range of furnace concepts for heat treatment after 3D printing can be found in our catalog “Additive Manufacturing”.