SHRIMP FEED PELLET MACHINE
OUTSTANDING PERFORMANCE
RICHI offers two types of shrimp feed production equipment—a pellet machine with a three-stage conditioner and an extruder with a dual-stage conditioner. These systems are capable of producing a wide range of shrimp feeds, delivering excellent performance across the board—from standard compound feeds that meet basic nutritional needs to specialized feeds tailored to specific growth stages and requirements.
Protein
Fat
Starch
Vitamins
Additives
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Raw Materials
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Shrimp Feed pellet machine
Shrimp feed extruder
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GLOBAL PROJECT REFERENCE
India
1.5–2 t/h Shrimp Feed Production Line Project
The client specializes in aquatic feed processing and already operates other feed production lines; this project marked their expansion into the market for sinking shrimp feed. After evaluating several brands, the client decided to partner with us to design and construct a sinking shrimp feed production line with a capacity of 1.5–2 tons per hour. The facility has now been in operation for over seven months.
Bahrain
2 t/h shrimp feed pellet machine project
For the first shrimp feed production line we established in Bahrain—a market where the local shrimp farming industry is transitioning from small-scale operations to industrial-scale production—the client seized the opportunity to set up a 2-ton-per-hour line. By utilizing a modular design, we enabled the client to minimize initial investment while ensuring the flexibility to expand the production line for increased capacity at any time in the future.
Philippines
3-4 t/h Aquatic Feed Extruder Project
The client has long been engaged in integrated aquaculture operations locally, and the cost of feed for fish, shrimp, and crabs represents a significant expense; consequently, the client decided to build an in-house aquatic feed production line to achieve self-sufficiency. Based on the client’s farming operations, local raw material availability, and market demand, we designed a comprehensive aquatic feed production line tailored to their needs.
Ecuador
4–5 t/h White Shrimp Feed Pellet Mill Project
The client is located in a whiteleg shrimp farming hub in Ecuador and primarily supplies feed to surrounding shrimp farms. This project aimed to replace aging pelleting equipment—which no longer met efficiency and quality standards—and to increase production capacity to 4–5 tons per hour. The client was highly satisfied with the project’s execution and has established a long-term partnership with RICHI.
Vietnam
3–4 t/h Shrimp Feed Production Line Project
The client operates in a region with a substantial market for whiteleg shrimp and black tiger shrimp; after conducting thorough market research, they decided to invest in a shrimp feed production project. Exercising great care in selecting an equipment brand, the client visited our factory and consulted face-to-face with our engineers, ultimately finalizing a production line setup that met their full satisfaction.
SHRIMP FEED PELLET MACHINE PARAMETERS
| Model | SZLH250 | SZLH320 | SZLH350 | SZLH420 | SZLH508 | SZLH558 | SZLH678 | SZLH768 |
| Main motor power (kW) | 22 | 37 | 55 | 110 | 160 | 185 | 250 | 315 |
| Feeder power (kW) | 1.1 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 2.2 |
| Modulator power (kW) | 1.5 | 4 | 4 | 7.5 | 7.5 | 11 | 11 | 11 |
| Ring die inner diameter (mm) | 250 | 320 | 350 | 420 | 508 | 558 | 673 | 762 |
| Finished granule diameter (mm) | 2-12 | 2-12 | 2-12 | 2-12 | 2-12 | 2-12 | 2-12 | 2-12 |
| Production Capacity (t/h) | 1.0-1.5 | 3-4 | 5-6 | 10-12 | 15-16 | 20-22 | 30-33 | 38-40 |
SHRIMP FEED EXTRUDER PARAMETERS
| Model | SPHS75x2 | SPHS120*2 | SPHS120*2 | SPHS150*2 | SPHS185*2 |
| Main motor power (kW) | 55 | 90 | 110 | 200 | 355 |
| Screw diameter (mm) | 75 | 120 | 120 | 150 | 185 |
| Feeder power (kW) | 1.5 | 1.5 | 1.5 | 1.5 | 2.2 |
| Modulator power (kW) | 7.5 | 11 | 11 | 11 | 11 |
| Modulator Specifications | DC400-244 | DC500-244 | DC500-244 | DC600-300 | DC600-300 |
| Differential Modulator Power (kW) | 11 | 11 | 11 | 15 | 15 |
| Differential Modulator Specifications | DC400*300-244 | DC500*400-300 | DC500*400-300 | DC600*500-300 | DC600*500-300 |
| Production Capacity (t/h) | 0.5-1.0 | 1.5-2.0 | 3.0-4.0 | 5.0-6.0 | 10-12 |
CORE COMPONENTS
At RICHI MANUFACTURE, equipment quality management is always the top priority, and product quality is guaranteed through multiple authoritative certifications such as ISO, CE, BV, and SGS, as well as stringent quality control processes.
For over 30 years, RICHI has continuously invested in the research and development and process optimization of pellet processing equipment, building a comprehensive technology R&D system and quality management system. Through independent technology accumulation, international standard certification, and rigorous production management, we ensure that every piece of equipment is characterized by stable performance, reliable quality, and strong adaptability to the global market.
Gear Drive
The main drive system utilizes a gear transmission mechanism featuring high-precision, aviation-grade gear grinding technology, ensuring smooth operation and low noise levels. Compared to belt drives, gear drives offer higher efficiency; shrimp feed pellet machines equipped with gear drives achieve a 15% higher production capacity than their belt-driven counterparts.
Variable Frequency Feeder
The feeding systems for our shrimp feed pellet mills and extruders utilize variable frequency drive (VFD) motors. This allows for precise speed control and uniform feeding, ensuring a stable and matched material flow to the ring die and rollers, thereby preventing material accumulation that could lead to machine blockages.
Ring Die and Rollers
The ring die and rollers form the core of the pelleting chamber, working in tandem to compress and shape the material. Both components are manufactured from 40CrMnTi alloy steel and undergo carburizing heat treatment to enhance wear resistance. These wear-resistant materials and processes significantly extend the overall service life of the equipment.
VFD-Controlled Dual Cutters
Given the specific size requirements for aquatic feed pellets, the cutting mechanism is crucial. The cutters are positioned closely against the outer surface of the ring die to slice the extruded pellets to the desired length. RICHI maintains strict quality control over the cutter manufacturing process, ensuring the blades are exceptionally sharp, wear-resistant, and durable.
Protection Devices
The shrimp feed pellet mill is equipped with an overload protection device—a shear pin. In the event of main motor overload, the shear pin snaps instantly to protect the machine and prevent unnecessary damage. Additionally, the equipment features a limit switch; if the unit is opened manually during operation, the main motor automatically cuts power, providing proactive safety protection for the operator.
Stainless Steel Conditioner
Components that come into direct contact with raw materials—such as the feeding auger, conditioner, and main door cover—are constructed from stainless steel. The use of a stainless steel conditioner, in particular, prevents raw material contamination caused by equipment corrosion and contributes to a longer service life for the machine.
Twin-Screw Design
The shrimp feed extruder utilizes a fully intermeshing, zero-clearance twin-screw configuration. This effectively controls shear forces, ensuring consistent cooking times and pellet expansion rates for all material within the extrusion chamber.
Variable Frequency Control
The extruder motor features variable frequency control, allowing for adjustable screw speeds to meet production requirements for various feed formulations, including sinking, semi-floating, and floating types.
Advanced Wear-Resistant Alloy Materials
The extruder employs a screw made of a new, highly wear-resistant 38CrMoAl alloy and a bimetallic extrusion chamber liner. These components effectively minimize wear, ensuring stable, long-term operation under high-output, high-quality production conditions.
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COMPLETE PRODUCTION LINE EQUIPMENT
1
Ultrafine Pulverizer
Aquatic feed places high demands on pellet quality, requiring pellets that do not easily disintegrate or dissolve in water; consequently, the initial raw material grinding stage requires a high degree of precision. In shrimp feed production lines, ultrafine grinders handle the fine processing of ingredients—such as fish meal, soybean meal, and grains—by pulverizing them into ultrafine particles. This results in feed pellets that are smoother and denser, significantly improving the quality of the pellet formation.
2
Mesh Belt Dryer
The mesh-belt dryer features a multi-layer mesh-belt structure in which material is spread evenly across the moving belt; hot air passes vertically through the material layer to achieve drying, ensuring high efficiency without damaging the material.
3
Ribbon Mixer
The ribbon mixer utilizes inner and outer double-layer ribbons for bidirectional kneading to achieve a mixing effect, featuring high efficiency and good uniformity.
4
Paddle Mixer
Paddle mixers use rotating paddles to throw materials throughout the mixer, and through a combination of convection, shearing, and diffusion, the materials are thoroughly mixed in a very short time.
5
Counterflow Cooler
Applied to the final stage of the shrimp feed production line, it rapidly cools the freshly formed, hot and moist pellets to room temperature while enhancing their hardness and abrasion resistance.
6
High Square Screen
The high-efficiency grading screen is designed specifically for fine particles. It has high screening efficiency and accuracy, and is used to screen out oversized or overly broken particles to ensure the quality of the finished product.
7
Conveyor
Conveyors serve as “bridges” connecting various process stages in a production line. They are mainly used for the horizontal or inclined transfer of materials and can transport powdery or granular materials.
8
Bucket Elevator
Bucket elevators are also an important link between different processes. They are mainly used for vertical, large-angle, and high-height material lifting, and come in two types: self-cleaning and Z-shaped.
9
Finished Product Packaging Scale
The finished product packaging scale is used for the automatic weighing and packaging of shrimp feed at the end of the production line. It rapidly dispenses material based on preset weights, enhancing packaging accuracy and efficiency while facilitating subsequent sealing, palletizing, and warehousing.
The fish feed pellet mill is equipment specifically designed to produce floating, sinking, and slow-sinking pellet feeds, suitable for various aquaculture species such as tilapia, catfish, carp, trout, and shrimp. Production capacity ranges from 0.5 to 40 tons per hour.
Aquafeed pellet making machine
The RICHI aquatic feed pellet machine is specifically designed to produce durable, water-stable floating, slow-sinking, and sinking pellets for the aquaculture of fish, shrimp, and crabs. It effectively prevents raw material waste and ensures that aquaculture water quality remains uncontaminated.
The crab feed pellets produced by our pellet mill are firm, water-resistant, and easily digestible, making crab farming easy and worry-free. We offer customized production line designs and all necessary equipment, providing a comprehensive, one-stop solution for crab feed production.
QUESTIONS
What is the difference between a shrimp feed pellet machine and a standard livestock/poultry feed pellet machine?
While standard livestock and poultry feed pellet machines prioritize production efficiency, shrimp feed pellet machines must address specific challenges—such as small pellet size, sinking properties, and water stability—in addition to output.
Although both types of machines produce pelleted feed through conditioning, extrusion, and pelleting, their equipment and process requirements differ significantly.
Standard livestock and poultry feed production focuses primarily on nutritional uniformity, pellet hardness, and production efficiency. In contrast, shrimp feed pellets are typically smaller and must remain intact in water for an extended period without disintegrating. Consequently, shrimp feed production demands finer raw material grinding, superior conditioning, precise pellet formation, and enhanced water stability.
For instance, when producing chicken feed, satisfactory pellets can be made even without extremely fine grinding; however, with shrimp feed, insufficient grinding often results in rough pellet surfaces and poor formation, which can even hinder the shrimp’s feeding.
Therefore, when designing shrimp feed production lines, we typically incorporate finer grinding systems and more robust conditioning equipment, while optimizing the design of the ring die, press rollers, and cutters to suit the characteristics of small shrimp feed pellets.
If you would like to learn more, please feel free to contact us; our professional technical engineers are available to answer your questions.
How do you choose between single-layer and multi-layer conditioners?
Shrimp feed has strict requirements regarding sinking characteristics and water stability; therefore, a three-layer conditioner is typically selected for its production.
Shrimp feed formulations often include a variety of ingredients such as fish meal, soybean meal, wheat flour, and oils. To enhance the water stability of the pellets, the ingredients must be thoroughly mixed with steam and moisture. Multi-layer conditioners allow the material to remain in the equipment for a longer period, ensuring a more uniform blend of steam, moisture, and raw materials. This improves the cooking (gelatinization) of the ingredients and helps enhance pellet formation quality and stability in water.
It is important to note that “more layers” does not automatically mean “better”; the choice should be based on the specific formula, production capacity, and product requirements. Richi offers a professional team to provide tailored design solutions, helping you achieve the best return on investment.
How do you choose between a shrimp feed pellet machine and a shrimp feed extruder?
In short, if your primary goal is producing sinking shrimp feed with stable output and high cost-effectiveness, a shrimp feed pellet mill is a good choice. However, if you need to produce a diverse range of aquatic feeds with varying densities and specifications, or if you require advanced cooking and expansion capabilities, a shrimp feed extruder is more suitable.
Of course, factors such as production capacity, raw material formulas, pellet specifications, product types, and your investment budget also need to be considered. Please share your specific requirements with us, and we will recommend the optimal equipment configuration to help you maximize your returns.
How does the shrimp feed pellet machine produce pellets of different sizes?
The primary method for producing shrimp feed pellets of varying sizes is to switch to a ring die with the appropriate hole diameter.
In addition to the ring die hole diameter, the final pellet size is influenced by factors such as the fineness of the ground raw materials, the ring die’s compression ratio, roller pressure, cutter position, pelleting speed, and subsequent screening processes.
For instance, when producing small shrimp feed pellets (around 1 mm), if the raw materials are not ground finely enough, the pellets may lack structural stability. Therefore, adjusting the pellet size involves more than just swapping the ring die; it requires fine-tuning equipment parameters and production processes in tandem.
Factories that need to produce multiple specifications of shrimp feed can stock several sets of ring dies with different hole diameters and switch between them based on product requirements.
The Richi technical team possesses extensive experience with shrimp feed production projects and can quickly assist you in resolving issues related to manufacturing various specifications of shrimp feed.
How is the water stability of shrimp feed pellets ensured?
Shrimp feed relatively slowly, so the feed must not disintegrate immediately upon entering the water. If the pellets crumble quickly, it not only wastes feed but can also pollute the water.
The water stability of shrimp feed generally depends on the following factors:
The raw materials must be ground finely enough. The more uniform the raw material particles, the better they bind during pelleting; if there are too many coarse particles, the finished pellets are more likely to disintegrate from within once submerged.
Adequate conditioning is essential. Before entering the pelleting chamber, raw materials must be thoroughly mixed with steam and moisture in the conditioner. Insufficient conditioning results in poor binding between particles, while excessive conditioning can interfere with the pelleting process itself. Therefore, moisture and temperature must be carefully controlled based on the formula.
The formula is also crucial. Certain ingredients, such as wheat flour, possess inherent binding properties; a well-balanced formula helps improve pellet strength and water resistance.
Finally, the ring die parameters must be properly matched. The die hole diameter, compression ratio, and roller pressure all influence pellet density. Insufficient extrusion pressure leads to loose pellets, while improper parameters can also affect production output and equipment operation.
Why do floating pellets occur when producing shrimp feed with a pellet mill?
Shrimp feed typically consists of sinking pellets. If floating pellets appear during production, the first step is to determine whether it is an isolated incident involving a small number of pellets or if the entire batch contains a significant amount of floating material.
One common cause is the presence of excessive air inside the pellets. If raw materials are not mixed uniformly or the material structure is not sufficiently dense during pelleting, air pockets may remain within the pellets, reducing their density.
Additionally, the following factors can also lead to floating pellets:
Inconsistent raw material moisture or conditioning results
Uneven grinding of raw materials
Excessive oil content in the formula
Loose internal pellet structure
Insufficient pelleting pressure
Improper cooling rate or method
Therefore, when floating pellets occur, it should not be immediately assumed that the pellet mill is at fault. A systematic check across the stages of formulation, grinding, conditioning, pelleting, and cooling is usually required.
If you need assistance troubleshooting equipment issues or optimizing your production formula, please feel free to consult our experts.
What causes an uneven surface on the pellets during the granulation process?
An uneven surface on shrimp feed pellets usually indicates a lack of optimal matching between the raw materials, the conditioning process, and the pelleting parameters.
As previously mentioned, the most common cause is that the raw materials are not ground finely enough or lack uniform particle size.
Shrimp feed pellets are inherently small; if large particles are present in the raw material, they can interfere with pellet formation as the material passes through the ring die. The resulting pellets may appear rough, with small particles protruding or even localized cracking.
A second cause is inadequate conditioning. If the steam, moisture, and raw materials are not thoroughly mixed—resulting in a blend where some parts are drier than others—surface irregularities are likely to occur during pelleting.
Additionally, one should check for ring die wear or blockage, ensure appropriate roller pressure and correct clearance between the die and rollers, verify stable raw material moisture content, check if the oil/fat content in the formula is excessive, and ensure the cutter is properly adjusted.
In short, an uneven pellet surface is usually not caused by a single factor but rather by instability in one or more stages of the production system.
