Chamber Ovens, Ovens for Laminated Safety Glass (LSG) Electrically Heated or Gas-Fired

Chamber oven KTR 1500 with charging cart Chamber oven KTR 22500/S with chamber lightning and drive-in tracks with insulated plugs which provide for an optimal temperature uniformity

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

Direct gas-firing at a chamber dryer

KTR 4500 with platform cart, inner lightning and observation windows

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


  • 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.
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mm2HeatingElectrical
     power in kW1 
 °Cwdhin lWDHKTR/KTR ..LSconnection*
KTR 1000 (LS)260100010001000100019001430181518/on request3-phase
KTR 1500 (LS)260100010001500150019001430231518/363-phase
KTR 3100 (LS)260125012502000310021501680290527/453-phase
KTR 4500 (LS)260150015002000450024001930290545/543-phase
KTR 6125 (LS)260175017502000612526502200300045/633-phase
KTR 6250 (LS)260125025002000625021503360300054/on request3-phase
KTR 8000 (LS)260200020002000800029002450300054/813-phase
KTR 9000 (LS)260150030002000900024003870300072/on request3-phase
KTR 12300 (LS)2601750350020001230026504400300090/on request3-phase
KTR 16000 (LS)26020004000200016000290049003000108/on request3-phase
KTR 21300 (LS)26026503550230021300375043003500108/on request3-phase
KTR 22500 (LS)26020004500250022500290054003500108/on request3-phase
1Depending on furnace design connected load might be higher *Please see page 73 for more information about supply voltage
2Outer dimensions from chamber ovens KTR .. LS are different