1-2T/H Large Capacity Floating/Sinking Wet-type single screw fish feed pellet extruder Production Line Carp Shrimp Pet Food Motor PLC Pump Gear

1. Product Description

1.Fish Feed Machinery /Wet-type single screw floating fish feed extruder machine process flow:

Raw material preparation→Mixing raw material→Conveying→Extrusion→Conveying→Drying→Screening→Oil spraying→Flavoring→Packing

2. Fish Feed Machinery /Wet-type single screw floating fish feed making machine setting:

Mixer→Conveyor→Extruder→Wind conveyor/hoister→Multi-layer dryer→Sifter→Hoister→Oil sprayer→Single/double roller→Packing machine

In some cases,the production need to mill, and can adopt:Mixer→Conveyor→Extruder→Crusher→Packing machine

3.Fish Feed Machinery /Wet-type single screw floating fish feed pellet machine specifications: 

2. Technical Analysis & Advantages of Wet-type single screw floating fish food pellet maker machines

In the competitive landscape of aquatic feed and pet food production, the Wet-type single screw fish feed processing machine stands as the industry standard for achieving high ROI and superior product quality. By integrating advanced thermal conditioning with precision extrusion, this technology offers a perfect balance between operational cost and nutritional excellence.

I. Five Key Technical Features

1. High-Efficiency Thermal Conditioning System

• The defining difference of the wet process is the Pre-conditioner (available in single or twin-shaft differential configurations).
• Thorough Pre-gelatinization: By injecting saturated steam, the material achieves a moisture level of 20–30% and a temperature of 80–100°C before entering the barrel. This ensures the starch is "pre-cooked," significantly improving digestibility.
• Optimal Nutrient Retention: Pre-conditioning reduces the material’s residence time and required shear force within the barrel, protecting sensitive proteins and vitamins from excessive thermal degradation.

2. Modular Screw and Barrel Architecture

• Configurable Elements: The screw is composed of Modular Elements, including specialized Kneading/Shear blocks, pressure rings (shear locks), and conveying elements. This allows the operator to fine-tune the energy input based on specific formulas.
• High-Grade Wear-Resistant Alloys: Our screws and liners are treated with Vacuum Heat Treatment or finished with wear-resistant alloy spray-welding, doubling the service life compared to standard components.

3. Precision Zone-Specific Temperature Control

• Multi-stage Jacket System: The barrel features independent heating/cooling jackets (steam or water), allowing for Zone-Specific Temperature Control along the entire extrusion path.
• Advanced HMI & PLC Integration: An integrated Human-Machine Interface (HMI) and PLC system provide real-time monitoring of pressure, torque, and temperature, ensuring total batch-to-batch consistency.

4. High-Performance Quick-Change Die System

• Versatile Shaping: Equipped with a Quick-change die assembly and a frequency-controlled rotary cutter. It can produce everything from 0.5mm micro-aquafeeds to large-caliber pet treats.
• Buoyancy Management: By adjusting the steam injection and die-head pressure, the system precisely controls the Bulk Density, enabling the production of floating, sinking, or slow-sinking feeds.

5. Optimized Specific Energy Consumption (SEC)

• Thermal vs. Mechanical Energy: By utilizing cost-effective steam for heating rather than relying solely on mechanical friction, the Specific Energy Consumption (SEC)—specifically electricity—is reduced by over 30% per ton of finished product.

3. Key Advantages of Wet-type single screw floating fish feed pellet extruder machines

1. Superior Starch Gelatinization & FCR
The wet extrusion process pushes starch gelatinization levels to over 90%. For the end-user (farmers and pet owners), this translates to a significantly improved Feed Conversion Ratio (FCR) and reduced environmental impact through lower fecal output.

2. Enhanced Biosafety & Pathogen Control
The HTST (High Temperature, Short Time) process—reaching instantaneous temperatures of 120–150°C—guarantees the Inactivation of anti-nutritional factors (like trypsin inhibitors) and the total elimination of pathogens such as Salmonella and E. coli.

3. High-Fat Inclusion Capability
The wet process allows for higher oil/fat inclusion rates (up to 12%–15%) within the formula without causing screw slippage or uneven discharge. This is a critical advantage for producing premium, high-energy pet food and carnivorous fish diets.

4.Longer Service Life of Wear Parts:

 Compared with dry-type single-screw extruders, the screw and liner of the Wet-type single screw floating fish food maker machine can last 2–3 times longer under proper operation, helping reduce downtime and maintenance costs.

Why Does the Wet-Process Wet-type Single-Screw floating fish food pellet making machine Offer a Higher ROI for Floating Fish Feed Production?

1. Comparable Feed Quality with Lower Equipment Investment

A properly designed wet-type single-screw floating fish feed extruder can achieve high starch gelatinization and stable pellet expansion through effective moisture conditioning and temperature control. In practical production, starch gelatinization rates can exceed 90%, helping produce floating feed pellets with good water stability, smooth surface quality, and uniform nutrient distribution.

Compared with twin-screw extrusion systems, Wet-type Single-Screw floating fish feed pellet maker machines provide a cost-effective solution for feed producers who require reliable pellet quality with a lower initial investment.

2. Lower Equipment Cost and Easier Maintenance

For the same production capacity, a wet-process single-screw floating fish feed production line generally requires lower equipment investment than a twin-screw system. Its simpler mechanical structure reduces the number of key components and makes daily operation, maintenance, and spare parts replacement easier.

This design is especially suitable for small and medium-sized feed mills, aquaculture farms, and investors who want to reduce operating complexity while maintaining consistent feed production.

3. Flexible Processing for Different Feed Formulations

Wet-type single screw floating fish feed pellet making machines can process a wide range of aquatic feed formulations, including formulas with relatively high oil content. With proper ingredient preparation and process adjustment, some models can handle feed formulations containing up to 12% oil.

This flexibility allows producers to manufacture different types of floating fish feed for species such as tilapia, catfish, carp, and other aquaculture applications.

4. Primary Applications

• Aquaculture: High-protein floating fish feed, shrimp feed, and specialized crab diets.
• Pet Nutrition: Premium kibble for cats and dogs, and ornamental fish flakes/pellets.
• Food Processing: Textured Vegetable Protein (TVP), extruded snacks, and industrial pre-gelatinized starches.

FAQ

Q1: What is the main advantage of a wet Type floating fish feed pellet maker machine compared to a dry type floating fish food extruder machine?

A: The primary advantage lies in the Pre-conditioning system. In the wet process, raw materials are pre-heated and hydrated using saturated steam before entering the barrel. This leads to:

• Higher Starch Gelatinization: Reaching over 90%, which ensures better digestibility and pellet water stability.

• Increased Capacity: Pre-conditioned material is easier to extrude, increasing output by 15-20% compared to dry machines.

• Reduced Wear: Softened materials significantly lower the friction on the screw and barrel, extending the service life of wear parts by up to 40%.

Q2: Can a single screw floating fish feed pellet making machine produce both floating and sinking fish feed?

A: Yes. A high-quality Wet-type single screw floating fish feed machine can precisely control the bulk density of the pellets.

• For Floating Feed: We increase the steam injection and die-head pressure to create a highly expanded, porous structure.

• For Sinking Feed: By adjusting the screw configuration and reducing the expansion ratio (lowering steam or using a specialized venting barrel), we produce high-density pellets that sink immediately.

• Note: The formula’s starch and fat content also play a crucial role in determining buoyancy.

Q3: How long do the screw and barrel last, and what materials are used?

A: For professional-grade machines, we use 38CrMoAl alloy steel with a vacuum nitriding treatment (surface hardness HRC 55-60).

• Service Life: Under normal operation with a wet process, a screw typically lasts 2,000–4,000 hours, and the barrel liners can last even longer.

• Maintenance Tip: The wet process acts as a "lubricant," so the components last 2-3 times longer than those in dry-type extruders, which rely on harsh mechanical friction for heating.

Q4: Is a Wet-type Single-Screw floating fish feed pellet mill sufficient for high-fat pet food or fish feed formulas?

A: Modern Wet-type single screw fish feed making machines are designed to handle oil/fat content up to 12%–15%. Thanks to the pre-conditioning system, the material forms a stable "viscoelastic" dough that maintains enough friction for extrusion even with higher fat levels. For formulas exceeding 17% fat, a twin-screw extruder might be recommended, but for most premium aquatic feeds and pet foods, the wet-type single screw offers the best ROI (Return on Investment).

Q5: How does the wet process help in reducing energy costs?

A: It follows the principle of "Steam instead of Electricity."

• SEC (Specific Energy Consumption): Generating heat through mechanical friction (dry process) is electrically intensive. The wet process uses cost-effective steam for thermal energy, which can reduce electricity consumption per ton of feed by 30% to 50%. This makes it the most sustainable choice for large-scale industrial production.

Q6: Does the high temperature during extrusion destroy the nutrients in the feed?

A: On the contrary, the HTST (High Temperature, Short Time) principle protects nutrients. The material is exposed to peak temperatures (120°C-150°C) for only 5 to 10 seconds. This is enough to kill pathogens like Salmonella and inactivate anti-nutritional factors (like trypsin inhibitors) while preserving the integrity of essential amino acids and vitamins.

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