Forced Convection Pit-Type Furnaces electrically heated or gas-fired

Production processes such as tempering, solution annealing, artificial ageing, and soft annealing can be realized with these pit-type furnaces.

Process Control

Function and equipment

SAH3900_60S.png
Frischluftklappen_SAH
S10400_75AS
SAH5600_75S

Due to their robust design, these pit-type furnaces with air circulation are particularly useful for a professional heat treatment demanding optimum temperature uniformity. Production processes such as tempering, solution annealing, artificial ageing, and soft annealing can be realized with these pit-type furnaces. 

  • Tmax 600 °C or 850 °C
  • Useful for heavy charge weights
  • Powerful air circulation fan in the furnace lid for vertical air-circulation in the furnace chamber
  • Heating chamber with air baffle cylinder, feeding the recirculated air through the bottom grid
  • Pneumatic or hydraulic lifting device for swing lid
  • Temperature uniformity up to +/−  3 °C according to DIN 17052-1 
  • Over-temperature limiter with adjustable cutout temperature as temperature limiter to protect the furnace and load
  • 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.
  • Defined application within the constraints of the operating instructions
  • Controller with touch operation C540 (10 programs with each 20 segments)
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive
  • Freeware NTEdit for convenient program input via ExcelTM for WindowsTM on the PC
  • Freeware NTGraph for evaluation and documention of firings using ExcelTM for WindowsTM on the PC
  • MyNabertherm App for online monitoring of the firing on mobile devices for free download

Additional equipment

  • Controlled cooling for accelerated charge cooling
  • Optimization of the temperature uniformity up to +/−  2 °C according to DIN 17052-1 
  • Variable rpm converter control of the air circulation velocity
  • Motorized rolling lid or fully pneumatic/hydraulic swing lid
  • Process control and documentation via VCD software package for monitoring, documentation and control

Technical specifications

Model Tmax Inner dimensions cond. cylinder Volume Max. charging weight Outer dimensions2 in mm Heating Electrical
  °C Ø in mm h in mm in l in kg W D H power in kW1 connection
SAH 200/..   600 800 200 400 1460 1460 1850 27 3-phase
SAH 300/..   600 1000 300 400 1460 1460 2050 27 3-phase
SAH 500/.. 600 800 1000 500 600 1660 1660 2050 36 3-phase
SAH 600/.. or 800 1200 600 600 1660 1660 2250 54 3-phase
SAH 800/.. 850 1000 1000 800 1000 2000 2000 2050 63 3-phase
SAH 1000/..   1000 1300 1000 1000 2000 2000 2400 81 3-phase
SAH 1280/..   800 1600 1300 800 1660 1660 2800 81 3-phase
SAH 5600/..   1800 2200 5600 5000 2700 3000 3900 120 3-phase
1Depending on furnace design connected load might be higher 
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.

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Customer Test Center

What furnace is the right choice for this specific process? This question cannot always be answered easily. Therefore, we have set up our modern test center which is unique in respect to size and variety. A representative number of furnaces is available for tests for our customers.