A rule of thumb indicates the total preheater volume must be minimum four times the tank capacity of the marking machine; e.g. for a BM 3000 T machine with a material capacity of 445 L it is advised to have minimum preheater size of 4 X 445 litres (4 x 979 lb wt).
We advice purchasing 2 smaller preheaters instead of one large preheater (e.g. 2 preheaters of 600 L instead of 1 preheater of 1100 L). The reasons for this are:
- faster melting speed due to smaller capacity per preheater
- possibility to work with two colours
- easier to handle smaller jobs where less material is needed