Technologia procesów termicznych

Air Circulation Chamber Furnaces < 675 Liters Electrically Heated
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NA120/45 NA 250/45  
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N 15/65HA as table-top model

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N 250/65HA with quenching bath

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N 250/65HA with gas supply system

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Air circulation furnace NA 500/S with four compartments, each with roller conveyor and individual door

The very good temperature uniformity of these chamber furnaces with air circulation provides for ideal process conditiones for annealing, curing, solution annealing, artificial ageing, preheating, or soft annealing and brazing. The furnaces are equipped with a suitable annealing box for soft annealing of copper or tempering of titanium, and also for annealing of steel under non-flammable protective or reaction gases. The modular furnace design allows for adaptation to specific process requirements with appropriate accessories.

  • Tmax 450  °C, 650  °C, or 850  °C
  • Stainless steel air-baffles in the furnace for optimum air circulation
  • Swing door hinged on the right side
  • Base frame included in the delivery, N 15/65 HA designed as table-top model
  • Horizontal air circulation
  • Temperature uniformity up to +/- 5 °C according to DIN 17052-1 (model N 15/65 HA up to +/- 7 °C
  • Optimum air distribution enabled by high flow speeds
  • One removable tray and rails for two additional trays included in the scope of delivery (N 15/65 HA without removable tray)
  • Defined application within the constraints of the operating instructions

Additional equipment (not for model N 15/65HA)

  • Optimization of the temperature uniformity up to +/- 3 °C according to DIN 17052-1
  • Fan cooling to accelerate the cooling process
  • Motor driven exhaust air flaps
  • Manual lift door (up to model N(A) 250/.. (HA))
  • Pneumatic lift door
  • Adjustable air circulation for sensitive components
  • Additional removable trays
  • Roller conveyor in furnace chamber for heavy charges
  • Annealing boxes
  • Feed and charging aids
  • Designed for Tmax 950  °C
  • Process control and documentation with Controltherm MV software package
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeight
 °Cwdhin lWDHpower in kW3connection*in kg
NA 30/45450290420260301040129013853.01-phase195
NA 60/45450350500350601100137014756.03-phase240
NA 120/454504506004501201200147015759.03-phase310
NA 250/4545060075060025013501650172512.03-phase610
NA 500/45450750100075050015001850180018.03-phase1030
NA 675/45450750120075067515002050180024.03-phase1350
            
N 15/65 HA1650295340170154708454602.41-phase55
N 30/65 HA65029042026030607 + 255117513155.53-phase2195
N 60/65 HA65035050035060667 + 255125014009.03-phase240
N 120/65 HA650450600450120767 + 2551350150013.03-phase310
N 250/65 HA6506007506002501002 + 2551636186020.03-phase610
N 500/65 HA65075010007505001152 + 2551886201030.03-phase1030
N 675/65 HA65075012007506751152 + 2552100201030.03-phase1350
            
N 30/85 HA85029042026030607 + 255117513155.53-phase2195
N 60/85 HA85035050035060667 + 255125014009.03-phase240
N 120/85 HA850450600450120767 + 2551350150013.03-phase310
N 250/85 HA8506007506002501002 + 2551636186020.03-phase610
N 500/85 HA85075010007505001152 + 2551886201030.03-phase1030
N 675/85 HA85075012007506751152 + 2552100201030.03-phase1350
1Table-top model see page 22*Please see page 76 for more information about supply voltage
2Heating only beetween two phases 3Depending on furnace design connected load might be higher

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Air Circulation Chamber Furnaces > 560 Liters Electrically Heated or Gas-Fired
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N 3920/26HAS N 1500/85HA with electric charging system for heavy loads
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N 12000/25AS

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N 24500/20HAS

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Enclosed heater coils on electrically heated models

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Gas burner positioned along the furnace side

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N 2520/60HA with roller conveyor inside and in front of the furnace

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N 1500/85HA with lift door and work piece holders in the furnace

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Pull-out drawers for heavy loads

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Track cutouts for pallet truck or charging cart

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N 4010/45HA with track cutouts, chamber lighting and observation window

These air circulation chamber furnaces are available for maximum operating temperatures of 260 °C, 450 °C, 600 °C or 850 °C and are perfectly suited for demanding processes. Due to their robust and solid design even heavy loads can be heat treated. These furnaces are suited for use with baskets, pallets, and mobile furnace racks. The charging can be carried out with fork lift, pallet truck, or charging trolley. The basic furnace is standing on the shop floor without bottom insulation. Charging can be simplified by roller conveyors, if necessary also motorized. All furnaces are available with electric heated or gas heating.

Standard version for models up to 600 °C

  • Tmax 260  °C, 450  °C or 600  °C
  • Electrically heated or gas-fired
  • Electric heating by means of heater coils
  • Direct gas heating or upon request with indirect gas heating with radiation tube, e.g. for heat treatment of aluminum
  • Optimal air circulation for your charge by means of adjustable air outlets
  • Horizontal air circulation (type ../HA)
  • High air exchange for perfect heat transfer
  • Ground level charging without bottom insulation for 260  °C models
  • Temperature uniformity up to +/- 5 °C according to DIN 17052-1
  • Furnace chamber lined with alloy 1.4301 (DIN)
  • High quality mineral wool insulation provides for low outer temperatures
  • Inside unlocking device for furnaces with walk-in work space
  • Furnace sizes suitable for common charging systems, such as pallets, baskets, etc.
  • Double-wing door for furnaces with an internal width of more than 1500 mm (260 °C and 450 °C models). Furnaces for higher temperatures and with smaller sizes are equipped with a single-wing door.
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions

Additional equippment for models up to 600 °C

  • Optional floor insulation provides for improved temperature uniformity for 260  °C models
  • Entry ramps or track cutouts for floor-level charging cart of models with bottom insulation (not for 600 °C models)
  • Furnace positioned on base frame provides for ergonomic charging height
  • Electro-hydraulic lift door
  • Fan system for faster cooling with manual or motor-driven control
  • Motor-driven control of air inlet and exhaust air flaps for better ventilation of the furnace chamber
  • Observation window and/or furnace chamber lighting (not for 600 °C models)
  • Optimization of the temperature uniformity up to +/- 3 °C according to DIN 17052-1
  • Safety technology according to EN 1539 for charges containing solvents (not for 600 °C models)
  • Charging systems or roller conveyors, also electrically driven provide for easy charging
  • Catalytic or thermal exhaust gas cleaning systems
  • Process control and documentation with Controltherm MV software package

Standard version for models 850 °C

  • Tmax 850  °C
  • Electrically heated or gas-fired
  • Electric heating with heating elements on supports tubes
  • Direct gas heating into the outlet of the air circulation fan
  • Optimal air circulation for your charge by means of adjustable air outlets
  • Horizontal air circulation (type ../HA)
  • High air exchange provides for perfect heat transfer
  • Base frame with 900 mm charging height
  • Temperature uniformity up to +/- 5 °C according to DIN 17052-1
  • Air baffles made of 1.4828 (DIN)
  • Multi-layer insulation with fiber plates (not classified according to EU directive 67/548) provides for low outer temperatures
  • Furnaces sizes perfectly suited to accommodate common charging systems, e.g. like pallets or pallet boxes
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions

Additional equipment for models 850 °C

  • Electro-hydraulic lift door
  • Fan system for faster cooling with manual or motor-driven control
  • Motor-driven air inlet and control of exhaust air flaps for better ventilation of the furnace chamber
  • Optimization of the temperature uniformity up to +/- 3 °C according to DIN 17052-1
  • Base frame for customized charging height
  • Charging systems or roller conveyors, also electrically driven provide for easy charging
  • Designed for Tmax 950  °C
  • Process control and documentation with Controltherm MV software package
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmCirculationHeatingElectrical
 °Cwdhin lWDHrate m3/hpower in kW2connection*
N 1000/26HA26010001000100010001930190016003600153-phase
N 1500/26HA26015001000100015002380190016003600183-phase
N 1500/26HA126010001500100015001880240016003600183-phase
N 2000/26HA26015001100120020002380200018006400183-phase
N 2000/26HA126011001500120020001980240018006400183-phase
N 2010/26HA26010001000200020001880190027207200243-phase
N 2880/26HA26012001200200028802080210027207200483-phase
N 4000/26HA26015002200120040002380311018009000423-phase
N 4000/26HA126022001500120040003080241018009000423-phase
N 4010/26HA260100020002000400018802900272012800483-phase
N 4010/26HA1260200010002000400028801900272012800483-phase
N 4500/26HA260150015002000450023802400272012800483-phase
N 5600/26HA260150025001500560021103180234018000603-phase
N 6750/26HA260150030001500675021103680234019200903-phase
N 7200/26HA260200015002400720026102410300018000843-phase
N 10000/26HA2602000250020001000026103180284025600963-phase
            
N 1000/45HA(E1)45010001000100010001930190016003600151 / 363-phase
N 1500/45HA(E1)45015001000100015002380190016003600181 / 363-phase
N 1500/45HA1(E1)45010001500100015001880240016003600181 / 363-phase
N 2000/45HA(E1)45015001100120020002380200018006400181 / 423-phase
N 2000/45HA1(E1)45011001500120020001980240018006400181 / 423-phase
N 2010/45HA(E1)45010001000200020001880190027207200241 / 483-phase
N 2880/45HA(E1)45012001200200028802080210027207200481 / 603-phase
N 4000/45HA(E1)45015002200120040002380311018009000421 / 603-phase
N 4000/45HA1(E1)45022001500120040003080241018009000421 / 603-phase
N 4010/45HA(E1)450100020002000400018802900272012800481 / 603-phase
N 4010/45HA1(E1)450200010002000400028801900272012800481 / 603-phase
N 4500/45HA(E1)450150015002000450023802400272012800481 / 603-phase
N 5600/45HA(E1)450150025001500560021103180234018000601 / 843-phase
N 6750/45HA(E1)450150030001500675021103680234019200901 /1083-phase
N 7200/45HA(E1)450200015002400720026102410300018000841 /1083-phase
N 10000/45HA(E1)4502000250020001000026103180284025600961 /1203-phase
            
N 1000/60HA60010001000100010001930190016003600363-phase
N 1500/60HA60015001000100015002380190016003600363-phase
N 1500/60HA160010001500100015001930240016003600363-phase
N 2000/60HA60015001100120020002380200018006400423-phase
N 2000/60HA160011001500120020001980240018006400423-phase
N 4000/60HA60015002200120040002380311018009000603-phase
N 4000/60HA160022001500120040003080241018009000603-phase
            
N 1000/85HA85010001000100010002100200019003400403-phase
N 1500/85HA85015001000100015002600200019006400403-phase
N 1500/85HA185010001500100015002100260019006400403-phase
N 2000/85HA85015001100120020002600210021009000603-phase
N 2000/85HA185011001500120020002200280021009000603-phase
N 4000/85HA850150022001200400026003400210012600903-phase
1Reduced connected power for plastics applications*Please see page 76 for more information about supply voltage
2Depending on furnace design connected load might be higher

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Chamber Dryers Electrically Heated or Gas-Fired
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 KTR 1500 with charging cart KTR 21640/S with chamber lightning and drive-in tracks with insulated plugs which provide for an optimal temperature uniformity
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Standard models

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Motor-driven rotary rack with baskets for moving the charge during heat treatment

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KTR 3100/S for curing of composites in vacuum bags incl. pump and necessary connections in the oven chamber

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Air-circulation in the chamber dryer

The chamber dryers of the KTR range can be used for complex drying processes and heat treatment of charges of normal weight and packing density to an application temperature of 260 °C. The high-performance air circulation enables optimum temperature uniformity throughout the work space. A wide range of accessories allow the furnace to be modified to meet specific process requirements. The design for the heat treatment of combustible materials in conformance with EN 1539 is available for all sizes.

  • Tmax 260  °C
  • Electrically heated (via a heating register with integrated chrome steel heating elements) or gas-fired (direct gas heating including injection of the hot air into the intake duct)
  • Temperature uniformity up to +/- 3 °C according to DIN 17052-1 (for design wihout track cutouts)
  • High-quality mineral wool insulation provides for outer temperatures of < 20  °C above room temperature
  • High air exchange for fast drying processes
  • Double-wing door for furnaces KTR 3100 and larger
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the dryer and load
  • Incl. bottom insulation
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Entry ramp for pallet trucks or track cutouts for charging cart
  • Optimal air circulation for individual charges by means of adjustable air outlets
  • Fan system for faster cooling with manual or motor-driven control
  • Programmed opening and closing of exhaust air flaps
  • Observation window and furnace chamber lighting
  • Safety technology according to EN 1539 for charges containing solvents
  • Charging cart with or without rack system
  • Design for clean room heat treatment processes
  • Process control and documentation with Controltherm MV software package
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating power Electrical
 °Cwdhin lWDHin kW1connection*
KTR 15002601000100015001500193014302315183-phase
KTR 31002601250125020003100216016802880273-phase
KTR 45002601500150020004500241019302880453-phase
KTR 61252601750175020006125266021803000453-phase
KTR 80002602000200020008000291024303000543-phase
1Depending on furnace design connected load might be higher *Please see page 76 for more information about supply voltage

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Ovens, also with Safety Technology According to EN 1539 Electrically Heated
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TR 240 TR 60 with observation window
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TR 450 with observation window

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TR 1050 with double door

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Electrical rotating device as additional equipment

TR 60 - TR 1050

With their maximum working temperature of up to 300 °C and forced air circulation, the ovens achieve a perfect temperature uniformity which is much better than in ovens of most competitors. They can be used for various applications such as e.g. drying, sterilizing or warm storing. Ample warehousing of standard models provides for short delivery times.

  • Tmax 300  °C
  • Working temperature range: + 5 °C above room temperature up to 300  °C
  • Models TR 60 - TR 240 designed as tabletop models
  • Models TR 450 and TR 1050 designed as floor standing models
  • Horizontal, forced air circulation results in temperature uniformity better than +/- 5 °C
  • Stainless steel chamber, alloy 304 (AISI)/(DIN material no. 1.4301), rust-resistant and easy to clean
  • Large handle to open and close the door
  • Charging in multiple layers possible using removeable grids (number of removeable grids included, see table to the right)
  • Large, wide-opening swing door, hinged on the right with quick release for models TR 60 - TR 450
  • Double swing door with quick release for TR 1050
  • TR 1050 equipped transport rollers
  • Infinitely adjustable exhaust at the rear wall with operation from the front
  • PID microprocessor control with self-diagnosis system
  • Solid state relays provide for low­noise operation
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load
  • Infinitely adjustable fan speed of the air circulation fan
  • Window for charge observing
  • Further removeable grids with rails
  • Side inlet
  • Stainless steel collecting pan to protect the furnace chamber
  • Safety Technology according to EN 1539 for charges containing liquid solvents (TRS) up to model TRS 240, achievable temperature uniformity +/- 8 °C
  • Transport costors for model TR 450
  • Various modifications available for individual needs
  • Upgrading available to meet the quality requirements of AMS 2750 E or FDA
  • Process control and documentation with Controltherm MV software package
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeightGrids in-GridsMax.
 °Cwdhin lWDHpower in kW2connection*in kgcludedmax.total load1
TR 603004503803506070065069031-phase9014120
TRS 602604503603505770068069063-phase9214120
TR 12030065038050012090065084031-phase12027150
TRS 12026065036050011790068084063-phase12227150
TR 240300750550600240100082094031-phase16528150
TRS 240260750530600235100085094063-phase16728150
TR 45030075055011004501000820144063-phase235315180
TR 10503001200630140010501470955192093-phase450414250
1Max load per layer 30 kg *Please see page 76 for more information about supply voltage
2Depending on furnace design connected load might be higher

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Air Circulation Chamber Furnaces/Dryers with Safety Technology for Solvent-Containing Charges according to EN 1539 or NFPA 68
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 Ship-lock type furnace N 560/ 6HACLS with safety technology, front charging and rear unloading Electrically heated chamber dryer KTR 1500 for drying of foundry cores with an alcohol-based binder
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Exhaust port and powerful exhaust fan mounted on the furnace

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Guide-in tracks for chamber dryers with bottom insulation

Safety Technology for Air Circulation Chamber Furnaces

Certain processes release and vaporize solvents or other flammable vapors. The concentration of these vapors must be kept below a certain limit to prevent ignition. European Norm EN 1539 and NFPA 68 in the USA prescribe the required safety equipment for these processes.

For these applications and processes, all air circulation furnaces of the KTR and air circulation chamber furnaces < 450 °C product lines are suited with safety technology for protection of a potential ignition in the furnace chamber.

To avoid an ignition in the furnace, flammable vapors must be diluted with air. Special care must be taken so high concentrations of flammable materials do not accumulate in “dead” areas within the furnace. For this purpose, the furnaces are equipped with an exhaust gas fan providing for a defined underpressure. A measurement system monitors this flow, while fresh air is simultaneously resupplied. In parallel, the furnace atmosphere is diluted by the inflow of fresh air. The air circulation is also monitored by the measurement system.

  • Furnace sizes between 120 and 10,000 liters
  • Powerful exhaust fan capable of maintaining underpressure in the furnace
  • Defined and monitored air circulation flow and exhaust air
  • Visual and audible emergency signals
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

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Air Circulation Pit-Type Furnaces Electrically Heated
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SAL 250/65 SAL 120/65 with protective gas retort box and cooling station next to the furnace
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Basket system for charging in different layers

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SAL 30/65 with exchangeable retort and two retort air cooling devices

SAL 30/45 - SAL 500/85

Pit-type furnaces with air circulation 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 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

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
ModelTmaxInner dimensions in mmVolumeMax. charging weightOuter dimensions 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 beetween two phases *Please see page 76 for more information about supply voltage
2Depending on furnace design connected load might be higher

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Air Circulation Pit-Type Furnaces Electrically Heated or Gas-Fired
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SAH 1780/60S SAH 1000/85  
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Motor-driven fresh-air and exhaust air flaps

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2 x SAH 5600/75 S in production

SAH 200/60 - SAH 1000/85

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
  • Air circulation fans in the furnace lid, high circulation rate
  • Heating chamber with air baffle cylinder
  • Heating elements on all wall surfaces
  • Distribution of air flow through grid at the furnace bottom
  • Pneumatic or hydraulic lid lifting device
  • Temperature uniformity up to +/- 3 °C according to DIN 17052-1
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Integral fan for fast cooling
  • Optimization of the temperature uniformity up to +/- 2 °C according to DIN 17052-1
  • Variable rpm converter control of the air circulation velocity for sensitive parts
  • Multiple zone control or special air circulation system for optimum temperature uniformity tailored to the charge
  • Charge weights up to 7 tons
  • Process control and documentation with Controltherm MV software package
ModelTmaxInner dimensions cond. cylinderVolumeMax. charging weightOuter dimensions 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 *Please see page 76 for more information about supply voltage

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Pit-Type and Top-Loading Furnaces with or without Air Circulation Electrically Heated or Gas-Fired
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SAT 1512/85S S 5120/GS1, furnace chamber divided in two sections, split cover
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S 4100/S for sintering of high parts

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Furnace chamber S 5120/GS with receptacle for an insulating plate in order to devide the furnace chamber

Our top-loading furnaces are perfectly suited for the heat treatment of longer or heavier components. The furnace is usually charged with a factory crane. Due to their high-performance air circulation, the furnaces provide for excellent temperature uniformity up to a maximum temperature of 850 °C. The top-loading furnaces for the temperature range up to 1280 °C provide for very good temperature uniformity due to their five-side heating. Alternatively, these furnaces can also be provided with gas heating. Customized dimensions are designed and produced to accomodate the size and weight of the components to be treated.

  • Tmax 260  °C, 450  °C, 600  °C or 850  °C for furnaces with air circulation
  • Tmax 900  °C or 1280  °C for furnaces with radiation heating
  • Electrically heated or gas-fired
  • Heating from both long sides for furnaces with air circulation
  • Heating from all four sides and the bottom with SiC plates in the bottom as level stacking support for models to 900  °C or 1280  °C
  • High-quality insulation, adapted to the specific maximum temperature
  • Electrohydraulic opening system of the lid with two-hand operation
  • Closable air supply vents in the lower area of the furnace chamber
  • Closable exhaust air flaps in the lid
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Motor-driven exhaust air flaps for faster cooling
  • Controlled fan cooling with motor-driven exhaust air flaps
  • Multi-zone control of the heating provides for optimum temperature uniformity
  • Furnace chamber can be devided in length for short workparts, partitions can be controlled separately
  • Designed for Tmax 950  °C, fan blade driven indirectly via a belt to protect the air recirculation motor against over-heating
  • Process control and documentation with Controltherm MV software package

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Air Circulation Bogie Hearth Furnaces Electrically Heated or Gas-Fired
 PRODUCT IMAGE PRODUCT IMAGE
 Air circulation bogie hearth furnace W 5290/85 AS with annealing box for heat treatment of coils under protective gas Directly gas-fired bogie hearth furnace WB 4500/85A
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W 10430/85AS

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Cooling fan for accelerated cooling

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Charge support in an air circulation bogie hearth furnace for 850 °C

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Air circulation bogie hearth furnace for heat-treating coils

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W 13920/60AS4 with bottom grid for heavy loads

The air circulation bogie hearth furnaces W 1000/60A - W 8300/85A are used when heavy charges weighing up to more than 25 t have to be heat-treated. They are ideal for processes such as solution annealing, artificial ageing, annealing or soft annealing, for which a high degree of temperature uniformity is crucial. The high-performance air circulation assures that the temperature uniformity achieved throughout the work space is outstanding. A broad selection of additional equipment enables these furnaces to be optimally adapted to suit specific processes.

  • Tmax 600  °C or 850  °C
  • Dual shell housing with rear ventilation provides for low shell temperatures for the 850  °C models
  • Swing door hinged on the right side
  • Heating from chrome steel heating elements for the 600  °C models
  • Heating from three sides (both side walls and the trolley) for the 850  °C models
  • High-performance air circulation fan with vertical circulation
  • Temperature uniformity up to +/- 5 °C according to DIN 17052-1
  • Bottom heating protected by SiC tiles on the bogie providing level stacking surface for the 850  °C models
  • Furnace chamber fitted with inner sheets made of stainless steel 1.4301 for 600  °C models and of 1.4828 for 850  °C models
  • Insulation structured with high-quality mineral wool for 600  °C models
  • Insulation made of high-quality, non-classified fiber material for 850  °C models
  • Bogies with flanged wheels running on rails for easy and precise movement of heavy loads
  • Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads from model W 4800
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Direct gas heating or upon request with indirect gas heating with radiation tube
  • Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads up to Model W 4000
  • Optimization of the temperature uniformity up +/- 3 °C according to DIN 17052-1
  • Bogie running on steel wheels with gear rack drive, no rails in front of the furnace necessary
  • Different possibilities for an extension to a bogie hearth furnace plant:
    • Additional bogies
    • Bogie transfer system with parking rails to exchange bogies running on rails or to connect multiples furnaces
    • Motor-driven bogies and cross-traversal system
    • Fully automatic control of the bogie exchange
  • Electro-hydraulic lift door
  • Motor-driven exhaust air flaps, adjustable via the program
  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Multi-zone control adapted to the particular furnace model provides for optimum temperature uniformity in the 850  °C models
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Designed for Tmax 950  °C, fan blade driven indirectly via a belt to protect the air recirculation motor against over-heating
  • Process control and documentation with Controltherm MV software package, NTLog and NTGraph or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating powerElectrical
 °Cwdhin lWDH in kW1connection*
W 1000/.. A 8001600800100018002390230545.03-phase
W 1600/.. A 100016001000160020002390253545.03-phase
W 2200/.. A 100022501000220020003040253590.03-phase
W 3300/.. A600120022501200330022003040274590.03-phase
W 4000/.. Aor1500225012004000250030402780110.03-phase
W 4800/.. A8501200330012004800220040902780110.03-phase
W 6000/.. A 1500330012006000250040902900140.03-phase
W 6600/.. A 1200460012006600220053902770140.03-phase
W 7500/.. A 1400385014007500240046402980140.03-phase
W 8300/.. A 1500460012008300250053902780185.03-phase
1Depending on furnace design connected load might be higher *Please see page 76 for more information about supply voltage

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