1. Overview
The Dry Type Fish Feed Pellet Extruder is a specialized equipment for producing floating aquatic feed, designed for small-to-medium scale aquaculture farms, family fish ponds, and micro feed workshops. Unlike the wet type extruder that relies on a steam boiler, it achieves high-temperature and high-pressure material ripening through screw friction alone—eliminating the need for additional steam systems.
This machine processes common raw materials (fish meal, corn, soybean meal, wheat bran, etc.) into nutrient-dense, water-stable floating pellets for fish, shrimp, crab, and other aquatic creatures. With its advantages of low cost, simple operation, and sufficient functionality, it has become the cost-effective choice for users who pursue practicality and budget control without compromising feed quality.
2. Core Difference: Dry Type vs. Wet Type Extruder
To help you make an informed choice, we clearly compare the two types of extruders in key dimensions:
| Comparison Dimension | Dry Type Fish Feed Pellet Extruder | Wet Type Fish Feed Pellet Mill |
|---|---|---|
| Steam Dependence | No steam boiler required (heat from screw friction) | Requires external boiler for continuous steam supply |
| Cost & Investment | Lower equipment price (30%-50% cheaper); no boiler investment | Higher initial investment (equipment + boiler) |
| Operation Complexity | Simple (no steam pressure adjustment); easy to master | Complex (needs to control steam pressure/temperature) |
| Pellet Quality | Smooth surface, good quality; slightly less refined than wet type | More smooth and dense; optimal water stability |
| Capacity | Lower (0.06-2.0t/h); suitable for small batches | Higher (0.18-5.0t/h); suitable for large-scale production |
| Target Users | Small/medium farms, family ponds, micro workshops | Large feed factories, intensive aquaculture bases |
3. Working Principle
The dry type extruder realizes “ripening-puffing-forming” in one step through mechanical friction, without external steam:
- Uniform Feeding: Raw materials (moisture content 12%-15%) are sent into the feeding device by a screw feeder, ensuring steady material supply to the extrusion chamber.
- Friction-Driven Heating & Pressing: The single screw shaft rotates at high speed, generating intense friction and pressure with the barrel. This raises the material temperature to 120-150℃ (no steam needed), fully cooking starch and denaturing proteins.
- Sterilization & Puffing: High temperature kills salmonella, bacteria, and other pathogens. As the cooked material is forced through the die, sudden pressure release causes it to puff into porous, floating pellets.
- Cutting & Shaping: A built-in cutter trims the extruded pellets to the required length (adjustable), completing the production of floating feed.
4. Core Features
4.1 Cost-Saving & Easy to Use
- No Boiler, Low Investment: Eliminates the need for a steam boiler and related pipelines, reducing initial investment by 30%+ compared to the wet type. It is especially friendly to users with limited budgets.
- Simple Operation: No need to adjust steam pressure or temperature—only control the feeding speed and cutter length. Even novices can master operation in 1 day.
4.2 High-Quality Floating Pellets
- 12-Hour Water Stability: Puffed pellets float on the water surface for over 12 hours without dissolving, minimizing nutrient leaching and water pollution. This also allows breeders to observe feeding conditions easily.
- Adjustable Pellet Size: By replacing dies, pellet diameter can be adjusted from 0.9mm (for fry/shrimp) to 10mm (for adult fish/crab), covering all growth stages of aquatic creatures.
4.3 Nutritious & Safe
- Full Ripening & Digestibility: High-temperature processing gelatinizes starch and breaks down anti-nutritional factors, increasing feed digestibility by 10%-15% compared to non-puffed feed.
- Pathogen Elimination: The 120-150℃ high temperature kills harmful bacteria (e.g., salmonella), reducing the risk of feed-borne diseases in aquatic animals.
4.4 Value-Added After-Sales Support
- Free Technical Formula: We provide customized floating feed formulas (e.g., shrimp feed, tilapia feed) after order placement, helping you match raw materials to local availability.
- Free Wear Parts: Complimentary easy-wear parts include 2 sleeves, 1 screw, 1 cutting knife, and 3 dies—reducing maintenance costs in the early stage.
5. Application Scenarios
The dry type extruder is perfectly suited for small-to-medium scale aquatic breeding and micro feed production:
- Family Fish Ponds: Produces 0.06-0.35t/h of self-use feed for tilapia, catfish, or carp, cutting reliance on expensive commercial feed.
- Small Aquaculture Farms: Makes specialized feed for shrimp, crab, or high-value fish (e.g., bass) with 0.4-1.0t/h capacity, controlling feed quality and cost.
- Micro Feed Workshops: Supplies small-batch floating feed to local farmers, supporting flexible production of multi-species feed.
6. Technical Parameters
| Model No. | Capacity (t/h) | Main Motor Power (kw) | Screw Feeder Power (kw) | Screw Diameter (mm) | Cutter Power (kw) |
|---|---|---|---|---|---|
| AMS-DGP50 | 0.06-0.08 | 11 | 0.4 | φ50 | 0.4 |
| AMS-DGP60 | 0.12-0.15 | 15 | 0.4 | φ60 | 0.4 |
| AMS-DGP70 | 0.18-0.25 | 18.5 | 0.4 | φ70 | 0.4 |
| AMS-DGP80 | 0.3-0.35 | 22 | 0.4 | φ80 | 0.6 |
| AMS-DGP90 | 0.4-0.45 | 37 | 0.4 | φ90 | 1.5 |
| AMS-DGP120 | 0.5-0.7 | 55 | 0.4 | φ120 | 2.2 |
| AMS-DGP135 | 0.8-1.0 | 75 | 0.4 | φ133 | 2.2 |
| AMS-DGP160 | 1.2-1.5 | 90 | 0.75-1.1 | φ155 | 3.0 |
| AMS-DGP200 | 1.8-2.0 | 132 | 1.5 | φ195 | 3.0-4.0 |
Note: The screw diameter of AMS-DGP60 was corrected from “460” to “φ60” for rationality.