Salt-Bath Furnaces for Chemical Hardening of Glass

Tmax 500 °C, tailored design possible up to Tmax 1000 °C.

Process Control

Function and equipment

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Salt-bath furnace TS ../50 is designed especially for chemical tempering of glass in the laboratory. Chemical tempering is a process used to strengthen thin glass with wall thicknesses of just a few millimeters. The benefit of chemical pre-stressing is that the surface quality remains intact. Almost all glass with a high sodium content can be strengthened through ion exchange.

  • Tmax 500 °C
  • Salt-bath furnace in compact design with salt-bath and pre-heated-/cooling chamber above the salt-bath
  • 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.
  • Bath temperature control
  • Indirect heating of the preheated chamber from the salt-bath
  • Automatic, time controlled movement from the preheating chamber into the salt-bath and back
  • Electrical door lock
  • Crucible made of hiqh-quality CrNi steel
  • Over-temperature limiter with adjustable cutout temperature 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
  • Controller with touch operation P570 (50 programs with each 40 segments)

Additional equipment

  • Hood for connection to local exhaust system
  • Charging basket according to customers drawing
  • Active heating for the preheated chamber
  • PLC
  • Process control and documentation via Nabertherm Control Center (NCC) for monitoring, documentation and control

Technical specifications

ModelTmaxInner dimensions crucible in mmVolumeOuter dimensions2 in mmHeating powerElectricalWeight
 °C1wdhin lWDHin kW3connection*in kg
TS 8/5050030010010081600105024002.03-phase650
TS 90/505006503004509016001050240020.03-phase700
1Salt-bath temperature
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
3Depending on furnace design connected load might be higher 

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