Additieve vervaardiging /
Begassingskasten en chargeerplaten voor modellen N 7/H - N 641/13

Protective Gas Boxes for Models N 7/H - N 641/13

N 7/H Box with protective gas connection

Winch stacker with protective gas box and furnace

The annealing boxes for heat treatment under protective gas are equipped with a protective gas intlet and outlet. A box with protective gas is advisable for larger workpieces requiring defined heat treating. We would be pleased to carry out Trials at our technical center can be carried out on request. Up to furnace model N 61/H with downward door opening the gas ductway is laid through the upper section of the door collar, for larger furnaces with upward door opening the supply line is laid through the lower furnace collar. The box is pressurized with non flammable protective and reactive gases such as argon, nitrogen or forming gas via the protective gas tube. There are manual and automatic systems available for protective gas. See pages 52 - 53. for more information about protective gases which can be used as well as manual and automatic protective gas systems. After charging the box it is closed and preflushed outside the furnace. Afterwards the box is placed in the preheated furnace. The quantity of gas can be reduced to the process flush quantity. After the heat treatment the box is pulled out of the furnace, the charge taken from the box and placed in the quenching medium. We recommend using binding wire on the parts so that they can easily be grasped by tongs. A flexible type K thermocouple is installed in the box for measuring the temperature; we recommend connecting it to a digital display device or to a temperature recorder. The box can also be cooled down on a cooling platform while closed. Be sure that the protective gas flowrate is increased for this application.

  • Tmax 1100 °C
  • For non-combustible protective and reactive gases argon, nitrogen and forming gas (observe national regulations)
  • Protective gas box with fiber sealing and lid, gas supply via a tube 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 N 31/H a charging cart is recommended
  • Digital temperature display
  • Gas supply systems
  • Charging forks
  • Draw Hook
Article no.FurnaceInner dimensions in mmOuter dimensions in mm1Preflush rateProcess flush rateCharging method
  wdhWDHl/minl/minof the box
631000963N 7/H1801909021622611615 - 20 5 - 8charging fork
631000968N 11/H, N 11/HR1802909021632611615 - 205 - 8charging fork
631000973N 17/HR1804409021647611615 - 205 - 8charging fork
631000978N 31/H28023020031630422620 - 25 10 - 15draw hook
631000983N 41/H28038020031645422620 - 25 10 - 15draw hook
631000987N 61/H, N 87/H28050020031657422620 - 2510 - 15draw hook
631000392N 81, N 81/1339449418546253021220 - 30 10 - 20charging stacker
631000393N 161, N 161/1345055025051559635520 - 3010 - 20charging stacker
631000607N 321, N 321/1347085018558096033020 - 3010 - 20charging stacker
631000608N 641, N 641/137201050270830116041420 - 3010 - 20charging 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 Boxes with Evacuation Lid for Models N 7/H - N 614/13

Protective gas box for N 41/H furnace with additional evacuation lid

For heat treatment of bulk goods and hollow parts under protective gas atmosphere we recommend the usage of protective gas boxes with an additional evacuation lid. These boxes are equipped with a lid for top charging, protective gas inlet and outlet as well as a evacuation lid with rubber sealing gasket. Gas ductwork and handling while hot is the same as the protective gas boxes described on page 37. In addition, these boxes also feature a connection for a vacuum pump with a shut-off valve. After charging the box in a cold state it is evacuated and afterwards flushed with protective gas. By repeating this process once or several times the results are considerably improved. After the box was flushed with protective gas the last time, the evacuation lid is removed and the box is placed into the preheated furnace. Protective gas is used for heat treatment. Thus traces of oxygen in the box can be reduced by a considerable amount which improves the quality of the components accordingly. After the heat treatment the box is taken out of the furnace and can be cooled in air or be opened to remove the charge. The box can also be force-cooled on a cooling platform while closed. Be sure that the protective gas flowrate is increased for this application.

  • Tmax 1100 °C
  • For non-combustible protective and reactive gases argon, nitrogen and forming gas (observe national regulations)
  • 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)
  • 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 N 31/H a charging cart is recommended
  • Digital temperature display
  • Vacuum pump
  • Gas supply systems
  • Charging forks
  • Draw Hook
Article no.FurnaceInner dimensions in mmOuter dimensions in mm1Preflush rateProcess flush rateCharging method
  wdhWDHl/minl/minof the box
631000966N 7/H1701707021221210615 - 205 - 8charging fork
631000971N 11/H, N 11/HR1702707021231210615 - 205 - 8charging fork
631000976N 17/HR1704207021246210615 - 205 - 8charging fork
631000981N 31/H25020015029224217820 - 2510 - 15draw hook
631000985N 41/H25035015029239217820 - 2510 - 15draw hook
631000989N 61/H, N 87/H25050015029254217820 - 2510 - 15draw hook
631000526N 81, N 81/1335449418542290521520 - 3010 - 20charging stacker
631000527N 161, N 161/1340055025046896535020 - 3010 - 20charging stacker
631006325N 321, N 321/13500700200650115034020 - 3010 - 20charging stacker
631006326N 641, N 641/13700900250850140043020 - 3010 - 20charging stacker
Article no. 601655055, 1 set of fiber insulation cord, 5 strips of 610 mm each1 Without piping and evacuation lid
Work space = box inner dimensions: - 30 mm to all sidesLarger boxes and custom dimensions available upon request
 

Charging Plates for Models N 7/H - N 641/13

Charging plate

We recommend these accessories for applications up to 1100 °C to protect the furnace floor, especially if a charging cart is used.

  • Tmax 1100 °C
  • Three raised edges
  • Heat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)
  • Larger plates and custom dimensions available upon request
Article no.FurnaceOuter dimensions in mm
  WDH
628000138N 7/H24029025
628000139N 11/H, N 11/HR24039025
628000141N 17/HR24054030
628000400N 31/H34039030
628000133N 41/H34054030
628000142N 61/H34079030
628001925N 87/H340104030
628000143N 81, N 81/1348079030
628000144N 161, N 161/1353079030
628000145N 321, N 321/13720114030
628000146N 641, N 641/13950133030