Dry Type Fish Feed Extruder

A dry-type fish feed extruder is a specialized feed processing machine that produces floating fish feed pellets without the need for an external steam boiler. It is widely used in fish farms and small to medium-scale aquaculture feed production due to its lower cost, compact design, easy operation, and maintenance. We supply dry-type fish feed extruders with capacities from 60 kg/h to 2,000 kg/h. It has no boiler required (lower cost). Suitable for small/medium-scale production. The output feed pellets are convenient for storage and transportation.

Modern fish farming relies on high-quality feed to ensure optimal growth, feed conversion ratio (FCR), and overall fish health.

• Floating fish feed for species like tilapia, catfish, trout, and carp.
• Slow-sinking feed for certain freshwater and marine species.
• Pet feed production (dog, cat, bird feed) with the right formulation.
• Experimental feed production in research and small hatcheries.

Dry Type Fish Feed Extruder Advantages

• No steam boiler required – lower investment and running costs.
• Simple operation & maintenance.
• Small footprint – suitable for small plants or mobile operations.
• Flexible pellet production – can produce floating or slow-sinking pellets.
• Adjustable pellet size with interchangeable dies.
• Fast startup time – no need to preheat with steam.

Parameters of Dry Type Floating Fish Feed Extruder

Mechanical energy from screw rotation generates heat and pressure to expand and shape the fish feed pellet.

1. Feeding – Raw materials (finely ground and mixed) enter the extruder’s feed hopper.
2. Conveying & Compression – A rotating screw moves the material forward, compressing it.
3. Frictional Heating – The mechanical action generates heat (up to 120–150 °C) and pressure.
4. Gelatinization – Starch and protein in the feed are gelatinized, improving digestibility.
5. Extrusion & Expansion – As the material passes through the die hole and exits into normal pressure, it expands and forms pellets.
6. Pellet Cutting – Rotary knives cut pellets to the desired length.
7. Feed Pellet Output – The final pellets can float or sink, depending on screw configuration and moisture content.

Typical Production Flow with Dry Type Extruder
Raw Material Grinding → Mixing → Dry Type Extrusion → Drying → Cooling → Oil Coating → Packing

Dry Type Fish Feed Machine Structure

The dry-type fish feed extruder components:

• Feed hopper – Holds pre-mixed feed ingredients.
• Screw & barrel – Main working zone for mixing, heating, and compressing.
• Die plate – Shapes pellets (various sizes available: 0.5 mm–12 mm).
• Cutter assembly – Adjustable for pellet length.
• Main motor & gearbox – Provides power and torque.
• Frame & base – Ensures stability during operation.

1. Simple structure, widely used, small flooring space, and low noise.
2. We can use dry powder materials to make feed pellets without adding extra water to the dry-type fish feed extruder. The dry pellet feed is convenient to store.
3. The dry pellet feed is well processed, which is easy for the animals to digest. During the process, the pathogenic microorganisms and parasites are eliminated.
4. These fish feed pellet extruders are also applied to make pellet feed for rabbits, ducks, and the like. What’s more, the pellet feed is more economical than the compound mash feed.
5. There are many different press molds you can choose from according to the size of the pellet that you need.
6. The raw materials that can be used in producing pellet feed are various.

Usage Tips for Best Performance
Raw Material Moisture: Keep at 10–12% before extrusion.
Particle Size: Grind ingredients to 0.5–0.8 mm for uniform pellets.
Die Selection: Use the right die diameter for fish species and growth stage.
Screw Speed & Feed Rate: Adjust for desired pellet density (floating or slow-sinking).
Cleaning: Run some waste material through after use to clean the barrel and die.
Lubrication: Regularly oil moving parts to avoid wear.

1. Stay away from the feed inlet when the fish feed extruder works. If you want to add materials to it, you should do so with the help of a stick, not your hand.
2. We should add materials before turning on the machine. Leave some materials in the extruder when you stop the machine in case the express roller and die mold directly touch each other.
3. If the machine gets stuck, we should turn it off immediately.
4. We should loosen the bolt of the express roller after finishing work.
5. Check the degree of tightness of the belt to prevent the belt from slipping and decreasing its capacity.
6. Add and replace the lubricating oil regularly.
7. It is normal that the temperature of the engine rises to 70 degrees after long continuous working.

Running-in of Floating Fish Feed Extruder
1. Blend 5 or 10-kilogram mash feed with edible oil of 5% or 10% together. If the mash feed becomes caked, we should disperse it to keep the feed in powder condition.
2. Put the feed into the extruder before we turn on the machine. Then we should regulate the bolt of the press roller until the feed can be extruded normally.
3. We should do test runs with the oily mash feed 3 to 5 times before adding dry powder into the machine. And the pellet, which is made of oily mash feed, should not be used in feeding rabbits.
4. If you want to regulate the length of the pellet, we can adjust the angle of the cutting knives.
5. Feed pellets are hot when they are just coming out of the machine. We should place them in a ventilated room. After cooling down, the feed pellets can be stored in bags.