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 documentation 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

ModelTmaxInner dimensions cond. cylinderVolumeMax. charging weightOuter dimensions2 in mmHeatingElectrical
 °CØ in mmh in mmin lin kgWDHpower in kW1connection
SAH 200/.. 600800200400146014601850273-phase
SAH 300/.. 6001000300400146014602050273-phase
SAH 500/..6008001000500600166016602050363-phase
SAH 600/..or8001200600600166016602250543-phase
SAH 800/..850100010008001000200020002050633-phase
SAH 1000/.. 1000130010001000200020002400813-phase
SAH 1280/.. 80016001300800166016602800813-phase
SAH 5600/.. 18002200560050002700300039001203-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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