R&D, design, production and quality control consolidated with many years of outstanding experience. You can find our products everywhere heat treatment takes place.
The furnaces of the model series AK with useful chamber size 30 – 600 liters as well as KK-U with useful chamber size 40 - 350 liters with max. temperatures of 950 °C are equipped with a strong circulation blower. Due to the circulation blower a fast warming a uniform temperature distribution is reached. AK and KK-U furnaces of LHT are used for annealing, tempering and glowing. Special sizes up to several cubic meters of useful chamber are possible. Additive Manufacturing (Rapid Prototyping, Rapid Tooling, 3D printing): Especially smaller sizes like AK 30 and AK 40 are used for annealing of additive manufactured parts by 3-D printers. The optional gas purging and housing of the outer insulation layers enable an extensive elimination of a scaling.
For sensitive materials the annealing and tempering is carried out in protective gas furnaces.
Therefore LHT protective gas furnaces of the model series VMK-S, useful chamber 2,6 – 15 liters and KS-S, useful chamber 70 – 460 liters are suitable. In both model series you can work up to temperatures above 1050 °C with protective gas. Mainly it is held under forming gas with hydrogen content < 5 % and with oxidation-sensitive building components with 100 % hydrogen or cracked gas. For latter the furnaces will be equipped with standard options gassing unit, burning-off device and safety package.
The optimization of production lines it is often necessary to work in continuous furnaces. Linn manufactures therefore small and medium size continuous belt furnaces up to 1150 °C.
Electrically heated shaft furnace with air circulation and quenching unit; for thermal treatment by means of loading baskets under inert gas; Tmax 650 °C
Chamber furnace for hardening and annealing, brick and ASW insulation, Tmax 1200 °C, 40 - 600 l
Chamber furnace for annealing, brick and ASW insulation, Tmax 800 °C, 22 - 603 l
Chamber furnace, bottom loader, PCW-insulation, high temperature, gastight, Tmax 2400 °C, 2-1000 l
Air circulation chamber furnace, brick and ASW insulation, Tmax 850 °C, 44 - 350 l
Cold wall furnaces with metallic heater and metallic shield insulation package, gas and vacuum tight, Ø100 – 1000 mm, heated length 100 – 1000 mm, Tmax 2800 °C
Chamber furnace, brick and ASW insulation, gas tight muffle, Tmax 1200 °C, 69 - 462 l
Chamber furnace, brick and PCW insulation, vacuum tight muffle, Tmax 1200 °C, 61 - 436 l
Laboratory chamber furnace, ASW insulation, Tmax 1340°C, 1,5 - 18,4 l
Laboratory chamber furnace, ASW insulation, Tmax 1200 °C, 1 - 25 l
Laboratory chamber furnace, ASW insulation, gas tight muffle, 2.6 - 15 l, Tmax 1050 °C
Laboratory chamber furnace, ASW insulation, gas and vacuum tight, 2 - 12 l, Tmax 1050 °C
Continuous belt furnace, brick and ASW insulation, Tmax 600°C, 43 kW, 92 l
Continuous belt furnace, annealing lehr, ASW insulation, Tmax 680°C, 112 kW, 375 l
Chamber furnace, high temperature, Al203-PCW and graphite insulation, gas-tight, Tmax 1350 °C, 20 l. For heating material samples for press tests.
Double tube push-trough furnace, ASW insulation, Ø 73 mm, heated length 2000 mm, tmax 1250 °C, 38 kW
Tube furnace, ASW insulation, high temperature, gas and vacuum tight, Ø 450, heated length 800 mm, Tmax 1050 °C, 26 kW
Tube furnace, ASW insulation, gas tight, Ø 134 mm, heated length 2000 mm, Tmax 1300 °C, 38 kW
Shuttle kiln, air circulation, ASW insulation, Tmax 700 °C, 282 kW, 18,2 m³
Chamber furnace, insulation made of ASW, 3-zone, gas tight muffle, Tmax 1200 °C, 245 l, 58 KW