Lump size limitation

Lump size limitation in a screw conveyor

The size of a screw conveyor not only depends on the capacity required, but also on the size and proportion of lumps in the material to be handled.

class 1 : A mixture of lumps and fines in which not more than 10% are lumps ranging from maximum size to one half of the maximum; and 90% are lumps smaller than one half of the maximum size.

lump size class 2

class 2 : A mixture of lumps and fines in which not more than 25% are lumps ranging from the maximum size to one half of the maximum; and 75% are lumps smaller than one half of the maximum size.

lump size class 2

class 3 : A mixture of lumps only in which 95% or more are lumps ranging from maximum size to one half of the maximum size; and 5% or less are lumps less than one tenth of the maximum size.

lump size class 3

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