Additive Manufacturing /
Forced convection pit-type furnaces SAL 30/45 - SAL 500/85 and protective gas boxes

Forced Convection Pit-Type Furnaces Electrically Heated

SAL 250/65 Pit-type furnace SAL 120/65 with protective gas retort box and cooling station next to the furnace

Basket system for charging in different layers

Protective gas box, AMS 2750 E design

Forced convection pit-type furnaces offer the advantage of easy charging, for heat treatment of heavy parts or loads in charge baskets. With maximum application temperatures available from 450 °C to 850 °C, these compact pit-type furnaces are particularly useful for processes such as tempering, solution annealing, artificial ageing, and soft annealing.

  • Tmax 450  °C, 650  °C, 850  °C
  • Air circulation fans in the furnace bottom, high circulation rate
  • Vertical air circulation with square air heating chamber
  • Temperature uniformity up to +/- 4 °C according to DIN 17052-1
  • Interior walls from stainless steel
  • Switchgear with solid-state relays
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Charging hoist with swivel arm and charge basket
  • Optimization of the temperature uniformity up to +/- 2 °C according to DIN 17052-1
  • Integrated fan for rapid cool down or separate cooling station for annealing box cooling outside of the furnace
  • Annealing box with protective gas inlet and outlet for production in a defined atmosphere
  • Manual or automatic gas supply systems for non-flammable protective or reaction gases
  • Process control and documentation via VCD software package for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeMax. charging weightOuter dimensions3 in mmHeatingElectricalWeight
 °Cwdhin lin kgWDHpower in kW2connection*in kg
SAL 30/454503002504003012075085012503.01-phase130
SAL 60/454503503505006012080095013506.03-phase225
SAL 120/45450450450600120120900105014509.03-phase280
SAL 250/4545060060075025040010501200160018.03-phase750
SAL 500/4545075075090050040012001350175027.03-phase980
SAL 30/656503002504003012075085012505.53-phase1130
SAL 60/656503503505006012080095013509.03-phase225
SAL 120/656504504506001201209001050145013.03-phase280
SAL 250/6565060060075025040010501200160020.03-phase750
SAL 500/6565075075090050040012001350175030.03-phase980
SAL 30/85850300250400308060074010005.53-phase1130
SAL 60/85850350350500608080095013509.03-phase225
SAL 120/85850450450600120809001050145013.03-phase280
SAL 250/8585060060075025025010501200160020.03-phase750
SAL 500/8585075075090050025012001350175030.03-phase980
1Heating only between two phases *Please see page 73 for more information about supply voltage
2Depending on furnace design connected load might be higher
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.

Protective Gas Boxes for Models SAL 30/45 - SAL 500/85

Protective gas box with sealing lock

For tempering and bright annealing, workpieces are laid in the box, the lid is pressed firmly shut using the sealing locks and flushed with protective gas outside the box for some time and then placed in the furnace. Due to weight reasons we recommend to use a charging aid for charging.

  • 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: 450 °C - 304 (AISI)/(DIN material no. 1.4301), 650 °C - 321 (AISI)/(DIN material no. 1.4541) or 850 °C - 309 (AISI)/(DIN material no. 1.4828)
  • Charging aid lifting eyes
  • Charge thermocouple type K for temperature display or charge control

Additional equipment

  • Digital temperature display
  • Gas supply systems
Article no. with chargeFurnaceInner dimensions in mmOuter dimensions in mm1
thermocouple wdhWDH
631000500SAL 30/45215165277281231354
631000501SAL 60/45265265377331331454
631000502SAL 120/45365365477431431554
631000503SAL 250/45515515627581561704
631000504SAL 500/45665665727731731804
631000505SAL 30/65215165277281231354
631000506SAL 60/65265265377331331454
631000507SAL 120/65365365477431431704
631000508SAL 250/65515515627581561654
631000509SAL 500/65665665727731731804
631000510SAL 30/85215165277281231354
631000511SAL 60/85265265377331331454
631000512SAL 120/85365365477431431554
631000513SAL 250/85515515627581561704
631000514SAL 500/85665665727731731804
Article no. 601655055, 1 sales unit of fiber insulation cord, 5 strips of 610 mm each1 Without piping