Glass chemical tempering oven

Automatic oven for chemical tempering of glass - TC3200


Maximum glass dimension: 700x430mm
Electric power: 22 kW
Oven overall dimensions: L=145 x W=108 x H=230 cm
Net weight: 1250 kg (salt not included)  


The first LEMA TC 3200, built in 1973, has become the standard reference in the chemical tempering process of glass lenses. The constructive and functional features of the LEMA TC 3200 have been carefully designed to meet the requirements imposed by the chemical process. 

The control and safety systems eliminate the need for human intervention in the event of system or power line faults, and assure full protection to the operator.

In LEMA TC 3200 unit the rack with the glasses comes out from the bath automatically if the salt temperature exceeds the allowed tolerances, there is a fault in the system or in the power line. The glass will come down again in the tank with salt only when the temperature returns to the working value.

LEMA TC 3200 does not require any staff intervention during the tempering cycle.

The construction is extremely strong. The melting tank is built in stainless steel AISI 321, thickness 5mm; its shape and welding technique make it suitable to withstand the strong mechanical stresses due to thermal expansions.

The heating power of the resistors in the furnace is distributed in such a way as to guarantee the uniformity of the bath temperature (+/- 5° C); installed electric power 16 kW .

The pre-heating chamber placed over the furnace has an installed electric power of 6 kW.

LEMA TC 3200 has been designed to minimize the costs of chemical tempering processes, the energy consumption in steady state is 5-6 kW per hour.

The unit includes a stainless steel AISI 316 trays rack.

Production capacity varies according to the glass dimension.

  • Standard cycle is around 16 hours.
  • Maximum working temperature: 510°C



  • Oven: 145x108x230 cm
  • Control board: 100x48x100 cm
  • Total net weight: 1250 kg
  • Tank size: 45x75x70 cm
  • Tank capacity: 350 kg of salt