The MTF wire wound tube furnaces, like the larger diameter CTF range use a wire element that is wound directly onto a fixed integral ceramic work tube.
This simple and economical design provides a furnace which can be used without the need to purchase an accessory work tube.
However, should vacuum or a modified atmosphere be required, it is necessary to use a separate slide-in work tube in order to provide the required length needed to fit end seals. Similarly, in some circumstances a work tube that has different physical or chemical properties to the fixed work tube may be required.
The use of an additional slide-in work tube protects the integral work tube and heating element.
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