What are the advantages and disadvantages of indirect and direct preheaters?


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What is the difference between a preheater with direct heating and a preheater with indirect heating?

The thermoplastic material is heated either directly from the burner or via thermal transfer oil in a separate chamber heated by the burner.
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Which preheater size should I choose?

A rule of thumb indicates the total preheater volume must be minimum four times the tank capacity of the marking machine;
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What is the melting capacity of Borum preheaters?

On average, 2 units of Borum preheaters with indirect heating BM ID-1100 (1100 L each) can melt 10000 kg on a 10-hour working day.
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How do I correctly maintain and use my Borum preheater?

The maintenance of the preheaters plays an essential role for both melting capacity and lifetime of the preheaters.
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How to properly use preheaters with direct heating?

When starting up don't put too much material in and let it melt while being mixed. Put in a few bags at a time and let them melt before adding more material.
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How many chutes do I need for transferring material from my preheater to the machine's material tank?

You can have just 1 chute, which you attach to the preheater that you are taking the melted material from. For your convenience, you can get 1 chute for each preheater you are using, especially if working with different colours.
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My burner starts up and then stops right away. What should I do?

It could be that the Cad cell is faulty (no connection or dirty).
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Oil spill from ID boilers

it could be because there is water in the heating oil or it could be that there is too much oil in the boiler.
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White smoke from the chimney​

If there is white smoke coming from the chimney, the burning is not correct.
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Is it possible to use a generator as a power source for preheaters instead of the PTO system of a supply truck?

You can get the hydraulic pressure from the PTO and the electric power from the electrical system on the truck (24V).
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