The 700-950kg/h Wet-type Twin screw floating fish feed pellet extruder machine is a professional-grade extruder designed for high-protein aquatic feeds. Our recent factory test confirms its ability to process complex formulas with 95% stability, producing pellets from 1mm to 12mm. Key advantages include superior starch gelatinization via steam conditioning and the ability to handle high-fat ingredients that typically stall single-screw models.
Wet-type Twin screw floating fish food extruder machine test
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1. Why This Test Matters: The "Wet-Type" Advantage
Unlike dry extruders, the wet-type system uses a pre-conditioner to inject steam and water into the raw materials before they enter the screw.
- Higher Digestibility: Steam breaks down complex starches, making the feed easier for species like Tilapia and Catfish to digest.
- Lower Wear & Tear: The moisture acts as a lubricant, extending the lifespan of the screws by 20-30% compared to dry extrusion.
- Precision Control: During our 950kg/h test run, the steam pressure was maintained at 0.4-0.6Mpa, ensuring a uniform 25% expansion rate across all pellets.
2. Technical Deep Dive: Twin-Screw vs. Single-Screw Wet-type floating fish feed pellet making machine
In our factory test, the twin-screw configuration demonstrated three critical performance benchmarks that single-screw machines cannot match:
- Self-Cleaning Mechanism: The intermeshing screws prevent material buildup, reducing downtime between formula changes.
- High-Oil Adaptability: We successfully tested formulas with up to 12% fat content. Single screw floating fish extruder machines usually fail or "slip" above 6-8% fat.
- Positive Displacement: No matter the density of the fish meal or soybean meal, the dual-screw action ensures a constant flow, eliminating "backflow" issues.
3. Detailed Test Parameters & Results
| Test Metric | Result | Observation |
| Output Capacity | 915 kg/h | Tested with 2.5mm die; exceeded 900kg/h avg. |
| Floating Rate | 100% | Zero "sinkers" observed in 24-hour water test. |
| Conditioning Temp | 90°C - 95°C | Optimal for protein preservation and pathogen kill. |
| Extrusion Temp | 135°C | Ideal for creating the "honeycomb" internal structure. |
| Pellet Uniformity | 98.5% | High-speed rotary cutter ensured clean ends. |
4. Infrastructure Requirements
To achieve the 700-950kg/h output seen in our test, your facility requires:
- Steam Boiler: A 0.5 Ton/hour boiler (Electric, Gas, or Biomass).
- Power Supply: Approximately 55kW-75kW for the main motor (3-phase).
- Grinding System: Raw materials must be pulverized to 60-80 mesh to prevent die blockage and ensure a smooth pellet surface.
5. Case Study: Who is this machine for?
During our factory demonstration, this 700-950kg/h model was evaluated for a commercial Tilapia farm project.
- The Challenge: The customer needed to include high levels of local rice bran and fish oil.
- The Solution: The twin-screw's high shear force easily homogenized these ingredients, producing a high-energy pellet that maintains water stability for over 12 hours.
6. FAQ:
Q: Does a Wet-type Twin-Screw floating fish feed extruder require a separate dryer?
A: Yes. Since steam is added during conditioning, pellets exit the machine with 25-30% moisture. You must use a Multi-layer Mesh Belt Dryer to reduce moisture to below 10% for long-term storage.
Q: Can I produce sinking and floating feed with the same Wet-type Twin screw floating fish feed production machine?
A: Absolutely. By removing the steam vent or adjusting the screw speed and formula (increasing moisture/decreasing temperature), you can produce high-quality sinking feed for shrimp or carp.
Q: What is the main maintenance cost for a 900kg/h Wet-type Twin screw fish feed extruder machine?
A: The primary wear parts are the Screw Sleeves and Cutting Blades. In our tests using standard formulas, the screw sleeves last for approximately 1,000–1,500 tons of production before needing replacement.
Q: Is it difficult to operate the steam conditioning system?
A: It requires basic training. Our factory test includes a 2-day operator tutorial covering the balance between steam pressure, moisture injection, and screw torque.
7. Final Engineering Verdict
The 700-950kg/h Wet-type Twin screw fish feed making machine is the "workhorse" of the medium-scale feed industry. It offers the lowest cost-per-pellet when factoring in feed conversion ratios (FCR), as the steam-cooked feed results in faster fish growth compared to dry-extruded alternatives.
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