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Almex B.V.

Almex is Dutch specialist of single screw extruders and ContivarTM expanders, which are used all over the world in fish food, petfood factories, animal feed mills, oil extracting, food producing and chemical factories.

Extruders technical data

Type AL150 AL200 AL300 AL350 AL400
Main motor (kW) 45-75 75-132 132-315 315-400 400-500
Barrel diameter (mm) 150 200 300 350 400
Capacity (t/h) 0,5-1,2 1,5-3,0 2,5-8,0 4,0-9,0 7,0-15,0

Expanders technical data

Type

AL150

AL200

AL300

AL350

AL400

Main motor (kW)

45-75

75-132

132-315

315-400

400-500

Barrel diameter (mm)

150

200

300

350

400

Capacity (t/h)

1-6

5-10

10-30

30-45

45-80


Extrusion in feed production

Extrusion is a modern production procedure used during grain processing (cereals, pulses and other agricultural products) for feed mixtures and for petfoods. We differentiate between dry and wet extrusion. The procedures are quite similar, however, during wet extrusion, the material is steamed in a conditioner prior to processing.

Wet extrusion is a process during which high pressure, temperature and mechanical force is used to transform the wetted material, rich in starch, proteins and pulp, into a shapeable material. Gradually, proteins are denaturalized and starch components are gelatinized. When leaving the extruder, the material passes through expansion nozzles in die, where it loses water due to a pressure decrease. Multiple expansion results in the porous brittle structure of the product.

The main advantage of extrusion consists in protein denaturalization and starch component gelatinization, which improves the digestibility of the resulting material for animals. It also significantly reduces the content of anti-nutrition substances and eliminates contaminating micro-organisms. The low moisture content of the extruded material contributes to the product's longer durability.

 
 

Download

Name Date Type kB
Brochure Extruder 2011-12-11 289.83 kB
Brochure Expander 2011-12-11 280.74 kB
 
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