2.5mm Wet-type Twin-Screw Floating Fish Feed Extruder Machine Test

Quick answer: A Wet-type Twin screw floating fish food extruder machine uses a preconditioner with steam and two intermeshing screws to cook and form high-quality 2.5 mm floating pellets at a commercial scale. Our 2.5 mm test run produced uniform, low-powder pellets with a floating rate above 98%-the setup preferred by professional aquafeed plants over dry single-screw units.

 

 

 

A wet-type twin screw floating fish feed pellet processing machine is a high-capacity extruder that conditions raw material with steam and water in a preconditioner, then forces it through two co-rotating screws. The twin-screw shear and precise temperature control produce dense, uniform floating (or sinking) pellets with excellent gelatinization and water stability.

 

Unlike the boiler-free dry single-screw model, the wet-type twin-screw is built for commercial aquafeed factories that need consistent quality at 1–10 t/h and the flexibility to switch between floating and sinking feed.

 

 

• Higher pellet quality - steam preconditioning lifts starch gelatinization to 90%+, improving digestibility and water stability.
• Uniform 2.5 mm output - twin-screw shear gives tighter size tolerance and almost no powder (fines <1%).
• Flexible recipes - handles high-fat and high-moisture formulas that single-screw dry machines struggle with.
• Floating or sinking - adjust steam, screw speed, and die to make both types on one line.
• Lower wear - water/steam lubrication reduces screw and barrel abrasion versus dry extrusion.

 

 

 

• Grind & mix - ingredients milled and blended into uniform mash.
• Precondition - steam and water are injected in the conditioner to cook and hydrate the mix (~60–90 s).
• Twin-screw extrude - two screws shear, compress, and heat the dough to 100–130°C under controlled pressure.
• Die & cut - material exits the die plate and a knife sizes pellets (here, 2.5 mm).
• Dry & cool - pellets dry to safe moisture and float for easy feeding.

 

 

 

MODEL	CAPACITY	POWER	CONDITIONER	CUTTER
65	0.3 T/H	22 KW	3.0 KW	0.75 KW
70	0.5 T/H	37 KW	3.0 KW	1.1 KW
80	0.8 T/H	55 KW	5.5 KW	1.5 KW
85	1.0 T/H	75 KW	7.5 KW	2.2 KW
90	1.5 T/H	90 KW	11 KW	3.0 KW
120	2.0 T/H	110 KW	15 KW	3.0 KW

Values are typical for standard aquafeed formulations; actual output depends on recipe fat/moisture and steam quality.

 

 

 

We ran a controlled 2.5 mm Wet-type Twin-Screw floating fish feed extruder machine test on a DSP135 line configured for commercial tilapia and catfish feed. Below are the full, instrument-measured test results from the batch.

 

Wet-type Twin screw floating fish feed making machine test in our factory

 

 

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Test Results (Measured Data)

 

Test Parameter	Setting / Target	Measured Result
Machine model	85 twin-screw wet type	-
Recipe	Tilapia & catfish floating feed	corn / soy / fishmeal / wheat
Pellet diameter	2.5 mm	2.5 ± 0.1 mm
Floating rate	≥98%	98.5% (after 12 h in water)
Throughput	~3.5 t/h	3.5 t/h (stable)
Bulk density	uniform	~450 g/L
Fines / powder	<1%	0.8%
Final moisture	8–10%	9.2%
Water stability	>12 h	>12 h intact
Main motor load	stable	~85% of rated
Steam consumption	160–220 kg/t	~180 kg/t
Die pressure	consistent	stable, no surging

 

2.5mm Wet-type Twin-Screw floating fish feed extruder machine test producing uniform floating pellets

 

 

 

2.5 mm Wet-Type Twin-Screw Floating Fish Feed Extruder – Verified 98.5% Floating Rate After 12 Hours

 

 

 

Factor	Wet-type Twin screw floating fish feed production machine	Dry Type single screw floating fish feed pellet extruder machine
Capacity	1–10 t/h	0.12–2.0 t/h
Steam/boiler	Required	Not required
Pellet uniformity	Very high (±0.1 mm)	Moderate
Recipe flexibility	High (fat/moisture)	Limited
Best for	Commercial plants	Farms / startups
Investment	Higher	Lower

 

Comparison Table: Dry Type vs. Wet Type Extruder

Components / Features	Dry Type Extruder	Wet Type Extruder
Motor	✅	✅
Screw	✅	✅
Conditioner	❌	✅
Steam Generator	❌	✅
Heating Ring	✅	❌
Belt	✅	✅
Control Cabinet	✅	✅
Cutter System	✅	✅
Hoist / Jib Crane	❌	✅
Material	Stainless Steel or Carbon Steel	Carbon Steel

 

Choose twin-screw wet-type when volume, consistency, and recipe range matter; choose dry single-screw when budget and simplicity come first.

 

 

• Premium feed price - uniform, high-floating pellets command better margins.
• Lower rejection rate - <1% fines means less waste and fewer complaints.
• Recipe freedom - run tilapia, catfish, shrimp, and salmonid formulas on one machine.
• Scalable throughput - models scale from 1 t/h pilot lines to 10 t/h plants.

Streamline your facility with our turnkey 3–4 t/h aquafeed solution-engineered for durability and 24/7 precision. Check out the full layout and specs.

 

 

• Secure steam - a boiler sized to 150–260 kg steam per ton of feed.
• Size by demand - match model capacity to your daily tonnage.
• Plan the full line - mixer, preconditioner, extruder, dryer, cooler, crumbler.
• Request a 2.5 mm test - reputable suppliers run your recipe and share video + specs, exactly as above.

 

 

 

1. What is a Wet-type Twin screw floating fish feed pellet extruder machine?

It is a steam-conditioned, dual-screw extruder that produces uniform floating or sinking aquafeed pellets at commercial scale, typically 1–12 mm.

 

2. Do I need a steam boiler for a Wet-type Twin screw floating fish food maker machine?

Yes. The preconditioner requires steam (and water), so a boiler sized to 150–260 kg per ton of feed is necessary.

 

3. Can it make both floating and sinking feed?

Yes. By adjusting steam, screw speed, and die, the same machine produces floating or sinking pellets.

 

4. What pellet sizes are possible at 2.5 mm tolerance?

Standard dies cover 1–12 mm; a 2.5 mm die typically holds ±0.1 mm on a twin-screw line.

 

5. What floating rate can I expect?

Well-tuned wet-type twin-screw machines reach 98–99% floating rate with pellets stable on water for 12+ hours.

 

6. How does it compare to a dry single-screw extruder?

Twin-screw wet-type offers higher capacity, better uniformity, and more recipe flexibility, but needs a boiler and a larger budget.

 

7. What throughput can a commercial line achieve?

From ~1 t/h (DSP100) up to 10 t/h (DSP200), depending on model and recipe.

 

8. How do I verify quality before buying?

Ask the supplier for a recorded test run on your recipe with measured diameter, floating rate, and throughput - like the 2.5 mm test documented here.

 

 

 

The 2.5 mm Wet-type Twin-Screw floating fish feed extruder machine test confirms why commercial aquafeed plants choose twin-screw wet-type technology: uniform 2.5 mm pellets, 98%+ floating rate, and throughput that scales with your business. If you need consistent, premium floating feed at volume, this is the machine to spec.