miAir Recirculating Chamber Furnaces

Both models in the ARF range have a chamber fitted with a robust stainless steel liner enabling bulky loads to be treated. Optimum heat transfer, reduced heating times and maximum temperature uniformity are provided by a fan which circulates the air within the chamber. The fan and air guide system provide continuous movement of air around the work piece. Heating is provided by mineral insulated sheathed elements, which are fully isolated from the liner. A type ‘K’ thermocouple is incorporated for maximum life and stability.
This range of furnaces is particularly suitable for a wide range of low temperature heat treatment applications, such as:

  • Stress relieving
  • Melting low temperature alloys
  • Thermal ageing
  • Annealing
  • Tempering

Ashing Furnaces

A choice of two models for ashing is available.

The AF 11/6 is an economy model with a traditional muffle element. It meets the requirement for a low cost unit which will allow materials to be burnt rapidly at closely controlled temperatures.

The SAF 11/1 is a more robust traditionally built muffle furnace capable of accepting up to 15 crucibles up to 50mm diameter. A chimney is fitted on both models as standard

    Economy Chamber Furnace

    An economical, rapid heating and lightweight furnace incorporating a one-piece low thermal mass heating element for general laboratory use. The drop down door can be used as a shelf. If your process generates significant amounts of corrosive fumes, please discuss your application with our sales department.

      General Purpose Chamber Furnaces

      A robust range of laboratory furnaces, providing an excellent level of versatility without compromising quality, safety or reliability. All units in the ECF range have a maximum operating temperature of 1200°C. Heating is provided by two side-wall elements manufactured from high temperature resistance wire spirals embedded into cast refractory slabs. An exhaust chimney is fitted as standard. The insulated door opens upwards and outwards keeping the hot face insulation away from the operator. A door switch isolates power from the heating elements whenever the door is opened for maximum operator safety. The use of double skin construction allows natural air convection to maintain a cool outer case.

      Advanced Wire Chamber Furnaces

      A range of high specification chamber furnaces developed to meet rigorous standards of quality, safety and reliability. These stylish furnaces provide rapid heating and cooling rates, exceptional temperature uniformity and low power consumption. The AWF models are available with a maximum operating temperature of 1200°C or 1300°C. Rapid heating and maximum temperature uniformity are provided by two side panel heating elements of ceramic fibre containing wire spirals freely radiating from sinusoidal grooves. The insulated door opens upwards and outwards keeping the hot face insulation away from the operator. A door switch isolates power from the heating elements whenever the door is opened for maximum operator safety. The use of double skin construction allows natural air convection to maintain a cool outer case.
      Typical applications include:

      • General heat treatment of ceramics and metals
      • Melting
      • Thermal ageing
      • Annealing
      • Enamelling
      • Decomposition in chemical analysis
      • Thermal shock testing

      High Temperature Chamber Furnaces

      A range of advanced high temperature general purpose chamber furnaces for use in both laboratory and light production applications.

      Models UAF 14, 15 and 16

      These models have maximum operating temperatures of 1400°C, 1500°C and 1600°C. Low thermal mass ceramic fibre insulation and silicon carbide elements, which radiate heat directly onto the workpiece, provide rapid heating and cooling and low running costs. The insulated door opens upwards and outwards keeping the hot face insulation away from the operator. A door switch isolates power from the heating elements whenever the door is opened for maximum operator safety. The use of double skin construction allows natural air convection to maintain a cool outer case. A robust silicon carbide hearth tile is fitted as standard.

      Models UAF 17 and 18

      These models have a maximum operating temperature of 1700°C and 1800°C. Models UAF 17/4 and 18/5 are bench mounted, while all other models are floor standing with lockable wheels as an optional extra. Ultra-high purity alumina low thermal mass insulation and vertically suspended Kanthal Super heating elements, which radiate heat directly onto the workpiece, provide rapid heating and cooling and low running costs. These models offer advanced chamber construction with modular roof system and removable hearth. The insulated door opens upwards and outwards keeping the hot face insulation away from the operator. An electrically operated door is standard on the UAF 17/27 and UAF 18/27 models. A door switch isolates power from the heating elements whenever the door is opened for maximum operator safety. Overtemperature protection is fitted as standard. Typical applications include: > General heat treatment > Thermal ageing > Sintering of ceramics > Processing of high temperature materials > Melting > Thermal shockin g of components > Ceramics testing

      Elevator Hearth Furnaces

      By making use of the latest advances in thermal technology, Lenton has developed a small range of elevator hearth furnaces for operation in air or inert gas atmospheres. The range is available with maximum operating temperatures of 1700°C and 1800°C with capacities of 3.4 and 7.9 litres. Optimum temperature uniformity is obtained by the inclusion of molybdenum disilicide heating elements which are positioned around the walls of the chamber ensuring uniform heating of the sample. A combination of dense refractory brick hot face insulation and a secondary low thermal mass layer of insulation provides a robust chamber with an efficient utilisation of power.
      Typical applications include:

      • Melting of high purity glass
      • Ceramic sintering and firing
      • Thermal shock testing
      • Firing in maintained atmospheres