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Induction Heated

IOV Induction Heated Heat Treatment Furnaces


Inductively heated vacuum heat treatment furnaces with high operating temperatures specially for the manufacture of hard materials. Standardized components for a broad application spectrum and useful space volumes from 34 to 338 litres.

System design

The IOV series is manufactured in four standard sizes each with a normal (1600°C) and a high temperature version (2200°C). A staged series of vessel diameters provides the respective length of vessel matched to the most advantageous ratio. This results in the optimum diameter/length ratio for the dimension of the induction coil and the heating element and therefore the useable space. 

A system comprises essentially the following basic modules:

System vessel

The vessel is arranged vertically. Vessel and lid are of stainless steel and double-walled for liquid cooling.

The heating element

The heating element consists of an induction coil and the heating unit. The heating unit usually is a series graphite susceptor and a thermal insulation layer of graphite felt. This design minimizes the heat loss and enables economic use of power. Additionally an extremely homogenous temperature distribution in the working chamber is attained. In special cases, especially where a carbon free environment is required, susceptors of refractory metals are used.

Power supply

Power is supplied via a static medium frequency transistor converter with a frequency from 2 to 4 kHz.

Cooling system

Components subjected to heat in the system are provided with liquid cooling.

For the various operational purposes there is a range of accessories, for example temperature measurement or for dewaxing where sintering is involved.

The double system, which is available in all sizes in the range, provides a highly economic solution. A double system comprises two complete furnaces but only one MF system and only one pumping station. The system is then operated in cycles in such a way that one furnace is evacuated and heated while the other is cooling down.

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