The forced convection 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 like glass tempering or cooling from glass, for which a good 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 bogie hearth 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 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
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

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 via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control

The chamber ovens of the KTR range can be used for complex drying processes and heat treatment of charges 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 chamber ovens to be modified to meet specific process requirements. The design for the heat treatment of flammable materials in conformance with EN 1539 (NFPA 86) is available for all sizes.

The chamber ovens can also be used for production of laminated safety glass (LSG). During this process two panes are bonded using a laminating foil and entered into the oven inside a vacuum bag. From outside the furnace a vacuum is generated via hose connection in order to avoid air inclusions between the panes during the heat treatment.

• Tmax 260  °C
• Electrically heated (via a heating register with integrated chrome steel heating elements) or gas-fired (direct or indirect gas-fired 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 < 25  °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 oven and load
• Incl. floor insulation
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Track cutouts for level drive-in of charging cart
• Connection ports for vacuum bags inside the oven for laminated safety glass (LSG). The vacuum pump is connected on the outside of the furnace.
• Base frame to charge the oven via a charging forklift
• Additional Door in the back for charging from both sides or to use the oven as lock between two rooms
• Fan system for faster cooling with manual or motor-driven control of the exhaust air flaps
• Programmed opening and closing of exhaust air flaps
• Air circulation with speed control, recommendable for processes with light or sensitive charge
• Observation window and furnace chamber lighting
• Safety technology according to EN 1539 (NFPA 86) (models KTR .. LS) for charges containing solvents
• Charging cart with or without rack system
• Design for clean room heat treatment processes
• Rotating systems for tempering processes
• Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control

Accessories

• Adjustable plate shutters to adapt the air guide to the charge and improve temperature uniformity
• Guide-in tracks and shelves
• Shelves with 2/3 extraction with evenly distributed load on the whole shelve surface
• Platform cart in combination with drive-in tracks
• Charging cart with rack system in combination with drive-in tracks
• Sealing shoes for ovens with drive-in tracks to improve temperature uniformity in the work space
• All KTR-models are also available with Tmax 300 °C.

With their maximum working temperature of up to 300 °C and 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
• Ovens TR 60 - TR 240 designed as tabletop models
• Ovens TR 450 and TR 1050 designed as floor standing models
• Horizontal, forced convection 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
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

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
• Door hinges left
• Reinforced bottom plate
• Safety Technology according to EN 1539 for charges (TR .. LS) containing liquid solvents up to model TR 240 LS, 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 via VCD software package for monitoring, documentation and control

The very good temperature uniformity of these forced convection chamber furnace with air circulation provides for ideal process conditiones for annealing, curing, solution annealing, artificial ageing, preheating, or soft annealing and brazing. The forced convection chamber 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 forced convection chamber 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 +/- 4 °C according to DIN 17052-1 (model N 15/65 HA up to +/- 7 °C)
• Optimum air distribution enabled by high flow speeds
• One frame sheet and rails for two additional trays included in the scope of delivery (N 15/65 HA without frame sheet)
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

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

• Optimization of the temperature uniformity up to +/- 3 °C according to DIN 17052-1
• Air inlet and exhaust air flaps when used for drying
• Controlled cooling with fan
• Manual lift door (up to model N(A) 120/.. (HA))
• Pneumatic lift door
• Air circulation with speed control, recommendable for processes with light or sensitive charge
• Additional frame sheet
• Roller conveyor in furnace chamber for heavy charges
• Annealing boxes
• Feed and charging aids
• Safety technology according to EN 1539 (NFPA 86) (models NA .. LS) for charges containing solvents
• Inlets, measuring frames and thermocouples for TUS measurements charge or comparative measurements
• Charge control
• Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control