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Today, in the converting industries and new generation of technologies for the food and feed production, extruders have found a very special place. It plays an important role in the manufacture of pasta, ready-to-eat cereals, processed snacks and soybeans (TSP for human use), aquatic feed and pet food. The process involves a combination of several unit operations including mixing, cooking, kneading and shaping. The extrusion method for feed production has become very popular over the last two decades for a number of reasons:

  • Starch cooking control
  • Bulk density control
  • Raw material flexibility
  • Nutrient advantages
  • Optimal product uniformity
  • Unique visual appearance

Garma Electric generates and imports different types of extruders, depending on the application, kind of raw materials, capacity and customers budget.

In the aqua feed production process, it is essential to consider the feed characteristics for the specific species of fish and shell fish. ANDRITZ offers unique, high-capacity extrusion lines for the production of all kinds of feed for fish and shell fish. The ANDRITZ extruders ensure that the feed has the right physical properties – giving it the correct sinking attributes according to where in the water the feed should be accessed.
ANDRITZ single screw extruders represent state-of-the-art technology, ensuring high quality aqua feed at minimum operating costs.

Extruder – EX1021
  • High capacity: 2-12 tph
  • Low maintenance and wear parts costs
  • High performance V-belt transmission
Extruder – EX1250
  • High capacity extrusion: 10-20 tph
  • High degree of processing flexibility
  • User-friendly design for operation and maintenance
  • Minimum downtime

Extruder – EX618 and EX621
  • Capacity: 1-10 tph
  • Low-cost maintenance and wear parts
  • High performance V-belt transmission
ANDRITZ extruders can be used for a great variety of aqua feed:
  • Fast sinking feed
  • Slow sinking feed
  • Floating feed
  • Feed with high or low oil content

Extruding feed is primarily a matter of cooking the starch. The better the starch is cooked, the better the quality of the feed. However, it is equally important to control the expansion of the feed, thus influencing density which determines both sinking and floating properties

Expansion Control System (ECS)

The patented ANDRITZ ECS is a reliable system for accurate control of expansion for any extruded product. The ECS controls sinking speed accuracy and efficiency regardless of formulation, raw material quality, and operator skills. The ECS controls the density of the extrudates externally from the extruder.


The Flextex system controls the starch cooking in the extrusion process. The required product density is maintained by means of on-line control of the specific mechanical energy.

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