1. Overview
The Wet Type Fish Feed Pellet Mill is a specialized puffing equipment designed for producing high-quality aquatic feed and pet food, distinguished from the dry type by its integration of a steam conditioner and boiler system. It leverages high temperature (＞100℃) and high pressure to fully cook and puff feed raw materials, creating pellets with superior palatability, digestibility, and water stability.
Ideal for medium-to-large fish feed manufacturers, intensive aquaculture bases, and pet food producers, this machine addresses the core demand for “premium, safe, and efficient” feed—making it the first choice for those targeting high-end aquatic breeding (shrimp, crab, high-value fish) and pet nutrition.
2. Working Principle: Steam-Driven Puffing for Superior Feed
The key difference between wet and dry type mills lies in the steam-assisted conditioning process, which underpins its superior performance:
- Steam Supply: The mill connects to an external boiler, which continuously delivers high-temperature steam to the built-in conditioner.
- Material Conditioning: Raw materials (fish meal, corn, soybean meal, etc.) enter the conditioner, where they are fully mixed with steam. This pre-heats and moistens the material, laying the foundation for uniform puffing.
- High-Temp & High-Pressure Extrusion: The conditioned material is pushed into the extrusion chamber by a single screw. Under extreme pressure and frictional heat (target temperature ＞100℃), starch in the material gelatinizes, proteins denature, and the mixture expands rapidly as it exits the die.
- Pellet Formation: A built-in cutter trims the expanded material into pellets of set length, resulting in smooth, dense, and water-stable finished products.
3. Core Advantages: Why Choose Wet Type Over Dry Type?
The steam-assisted process and optimized design give the wet type mill unparalleled advantages for premium feed production:
3.1 Superior Pellet Quality & Water Stability
- Long-Lasting Floating Performance: Puffed pellets float on water for over 12 hours without dissolving, reducing nutrient leaching and water pollution—critical for aquatic breeding (e.g., tilapia, shrimp) and easy feeding observation.
- Smooth & Uniform Appearance: Pellets have a sleek surface and consistent density, avoiding powder loss during transportation and improving product marketability.
3.2 Enhanced Nutrition & Safety
- Full Cooking & Digestibility: High temperature (＞100℃) fully cooks raw materials, breaking down anti-nutritional factors (e.g., trypsin inhibitors) and improving nutrient absorption rates by 15-20% compared to dry-type pellets.
- Pathogen Elimination: The high-temperature process kills salmonella, bacteria, and other pathogens, reducing the risk of feed-borne diseases in aquatic animals and pets.
3.3 Flexible & Adaptable Production
- Adjustable Pellet Sizes: By replacing dies, pellet diameter can be adjusted from 0.9mm (for fry/shrimp) to 15mm (for adult fish/crab), covering all growth stages of aquatic species.
- Multi-Purpose Application: Beyond aquatic feed, it produces high-quality puffing pet food for dogs, cats, and other pets—one machine for multiple uses.
3.4 Durable & Cost-Effective Operation
- Reduced Wear on Spare Parts: Steam conditioning lubricates the material, reducing friction between the screw, barrel, and die. Spare parts have a 30% longer service life than dry-type mills, lowering replacement costs.
- Free Value-Added Services: We provide customized floating feed formulas after order placement, plus free 易损 parts (2 sleeves, 1 screw, 1 cutting knife, 3 dies)—reducing startup costs.
4. Application Scenarios
The wet type fish feed pellet mill is widely used in high-end feed production scenarios:
- Aquatic Feed: Produces premium floating/sinking pellets for high-value fish (eel, sea bass), crustaceans (shrimp, crab), and ordinary aquatic species (catfish, carp).
- Pet Food: Makes puffing pet food with good palatability for dogs, cats, and small mammals.
- Industrial Production: The first choice for medium-to-large fish feed manufacturers, supporting batch production of standardized, high-quality feed.
5. Usage Attentions
To ensure stable operation and optimal product quality, note the following:
- Single Screw Design: The mill adopts a single-screw extrusion structure—avoid feeding hard impurities (e.g., metal, stones) to prevent screw/barrel damage.
- Post-Pelleting Treatment: Extruded pellets are 80℃ hot with 18-20% moisture:
- For capacity ＞500kg/h: Equip a dryer and cooler to reduce moisture to ≤13% (for storage stability).
- For small capacity (＜500kg/h): Sun-drying is sufficient.
- Steam Boiler Matching: Ensure the external boiler provides stable steam pressure (consistent with the conditioner’s requirements) to avoid uneven puffing.
6. Technical Parameters
| Model No. | Capacity (t/h) | Main Power (kw) | Feeding Power (kw) | Screw Diameter (mm) | Cutter Power (kw) | Conditioner Power (kw) |
|---|---|---|---|---|---|---|
| AMS-DSP60 | 0.18-0.20 | 15 | 0.4 | 60 | 0.4 | 0.37 |
| AMS-DSP70 | 0.30-0.35 | 18.5 | 0.75 | 70 | 0.4 | 1.1-1.5 |
| AMS-DSP80 | 0.40-0.45 | 22 | 0.75 | 80 | 1.5 | 1.5-2.2 |
| AMS-DSP90 | 0.50-0.55 | 37 | 1.1 | 90 | 2.2 | 2.2-3.0 |
| AMS-DSP120 | 0.7-0.8 | 55 | 1.1 | 120 | 2.2 | 2.2-3.0 |
| AMS-DSP135 | 1.0-1.2 | 75 | 1.5 | 135 | 3.0 | 3.0-4.0 |
| AMS-DSP160 | 1.8-2.0 | 90 | 2.2 | 155 | 3.0 | 4.0 |
| AMS-DSP200 | 3.0-5.0 | 132 | 2.2 | 195 | 4.0 | 5.5 |