Single Screw Extruder Machine
High-Efficiency and Stable Operation
It can produce floating and sinking aquatic feed with high water resistance. As a result, it is commonly used in various aquaculture farms and small-to-medium-sized feed plants. Below is a demonstration of the single screw extruder working. It features a highly efficient, energy-saving design that ensures stable output with low energy consumption.


Flexible and Efficient Production Solutions

This single screw extruder machine features a single-screw design, offering the advantages of simple operation and low investment costs. It can produce pellets in a variety of sizes, with common pellet diameters ranging from approximately 0.8 to 15 mm.
In terms of feed types, this single screw machine can produce floating fish feed, sinking aquatic feed, livestock and poultry feed, pet food, and specialty animal feed with varying formulations and densities. It also supports the production of expanded raw grains.
Its high-temperature expansion process provides sterilization, ensuring animal health. At the same time, it eliminates most toxins and harmful enzymes in the material, aiding in animal digestion and absorption. Both our dry and wet extruders are capable of meeting these requirements.
To enable efficient production, we offer a complete 0.2–0.1 T/H production line. This solution is equipped with flexible auxiliary equipment, covering processes such as raw material handling, extrusion, as well as pellet screening and packaging. Please feel free to share your production requirements with us.
Types of Single-Screw Extruder for Sale
We offer the following common equipment solutions to meet the production needs of a wider range of clients. These machines are suitable for various production sectors and deliver consistent, high-efficiency output. The following types of equipment are available with either wet or dry extruders. We can also customize the equipment to meet specific production requirements. Please feel free to contact us for more details.

Single extruder machine for fish feed
This extruder can produce both floating and sinking aquatic feed. These feed pellets are highly water-resistant and can remain stable on the water’s surface for over 12 hours. Common products include floating fish feed, sinking fish feed, shrimp feed, crab feed, and ornamental fish feed. We also offer twin screw fish feed extruder for producing higher-quality aquatic feed.
Typical Pellet Diameter: 0.8–12 mm


single screw extruder machine for whole grains
The equipment is suitable for processing whole grain raw materials. It can be used for the conditioning and pretreatment of various animal feed ingredients, such as soybean meal, corn, rice bran, grains, cottonseed meal, and full-fat soybean extruder products. These processed grains can be used in the production of aquaculture feed, juvenile animal feed, and other applications.
Starch Gelatinization Rate: 80–95%


single screw food extruder for Pet & Specialty
These types of pet foods typically require higher fresh meat content and protein levels. Our equipment can produce dog food, cat food, bird food, fox food, mink food, and more. This single-screw configuration meets basic production capacity requirements. If you have high-quality and high-capacity needs, we can provide the twin screw extrusion machine.
Typical Pellet Diameter: 1–15 mm


single screw machine for Livestock & Poultry feed
The feed produced by this machine is suitable for young livestock and poultry. It can accommodate various formulations, preserve the rich nutrients in the raw materials, and promote digestion and absorption. This machine can also be used to produce common types of functional feed. Common feed types include pig feed, cattle and sheep feed, and poultry feed.
Typical Pellet Diameter: 2–10 mm

single screw extrusion machine Parameter Selection
The following outlines the production capacity classifications and parameter configurations for this equipment, including dry-type extruder and wet-type extruder. As RICHI’s technology continues to advance, we will offer an expanding range of parameter configurations. Please feel free to contact us with your production requirements. We also provide customized equipment solutions.
| Model | DGP-90B | DGP-120B | DGP-160B | DSP-90B | DSP-135B |
| Main Motor Power (kW) | 37 | 55 | 90 | 37 | 75 |
| Feeder Power (kW) | 0.75 | 202 | 3 | 7.5 | 7.5 |
| Cutting Power (kW) | 0.55 | 1.1 | 1.5 | 1.1 | 1.5 |
| Screw Diameter (mm) | 90 | 120 | 160 | 90 | 135 |
| Overall Dimensions (mm) | 2100*1450*1350 | 2400*1950*1600 | 3100*2650*1800 | 2600*1600*1900 | 3750*1980*1950 |
| Capacity (T/H) | 0.2-0.4 | 0.5-0.6 | 0.8-1.0 | 0.5-0.6 | 0.8-1.0 |
Design Highlights
In addition to its simple structure and easy operation, this single screw extruder machine features several design highlights. It includes a smooth feeding mechanism, a precise cutting system, and wear-resistant dies. These features ensure efficient production throughout the entire process, from feeding to discharge.


Superior Wear-Resistant Screw
+
All screws and screw sleeves are made of high-hardness alloy steel. This material ensures the die is resistant to high temperatures and wear. Additionally, special heat treatment extends its service life, thereby reducing maintenance costs.
Variable-Speed Feeding System
+
The equipment is equipped with a variable-frequency drive. This allows for precise control of the feeding speed to accommodate different raw materials and production conditions. It is easy to operate, ensures more uniform feeding, effectively prevents machine jams, and guarantees smooth production.
Automatic Cutting Device
+
The device utilizes internationally advanced pelletizing technology. By employing a soft-blade contact mechanism, it achieves stepless speed-adjustable cutting. This method accommodates any pellet length while ensuring clean, burr-free cuts, thereby guaranteeing product quality.
Pressure Die Unit
+
This extruder is equipped with a specially designed pressure die unit. This unit provides dual assurance for both feed output and quality. Additionally, it features an electric heating system to enhance the expansion efficiency of raw materials.
More Energy-Efficient

Our single screw machine features an energy-efficient and eco-friendly design. It effectively reduces energy consumption per unit by 20%. At the same time, it improves raw material utilization and molding efficiency.
Easy to Maintain

The equipment is easy to operate and maintain, offering numerous production benefits. Its wear-resistant dies reduce component wear. All components are easy to disassemble and clean, lowering maintenance frequency and costs.
Longer Service Life

Bearings are exclusively sourced from FAG or SKF, ensuring more stable equipment operation. The screws are made of 38CrMoAl. Combined with high-quality spring steel blades, they offer superior wear resistance and extended service life.
Production Performance of Single-Screw Extruders
This extruder offers excellent adaptability to raw materials and superior extrusion performance. It can process a wide range of ingredient ratios while ensuring consistent output. The feed products it produces are highly palatable and easily digestible. It is an essential piece of equipment for fish feed production line, aquatic feed pellet plant, and other system.
Raw Material Types
This equipment is capable of handling basic feed formulations and achieving excellent extrusion results. The following are common ingredients used in aquaculture and animal feed production. In addition to these, it can also be used for other common formulations.

Corn Meal

Full-Fat Soybean

Full-Fat Soybean

Fish Meal

Fish Meal

Soybean Meal

Soybean Meal

Rice Bran

Rice Bran

DDGS

DDGS
Pellet Production Results
Through high-temperature extrusion and efficient puffing, these raw materials are transformed into nutritious and palatable feed pellets. Aquatic feed pellets are highly water-resistant and feature a moderate pellet size, catering to the feeding habits of various aquatic species. Animal feed pellets are nutritionally balanced and have a uniform texture, promoting optimal growth and performance. This equipment facilitates the production of a wide range of feed products.

Below are the pellet products produced by this single screw extruder machine. They all feature excellent structure and a smooth texture, meeting the needs of animal husbandry.

Floating Fish Feed pellets

Sinking Fish Feed Pellets

Shrimp Feed Pellets

Dog Food Pellets

Cat Food Pellets

Livestock & Poultry Feed Pellets

Turtle Feed Pellets

Extruded Full-Fat Soybean
Single-Screw Extruder Production Line
We offer complete production systems. This solution is equipped with a single screw extruder machine and other practical auxiliary equipment. With a production capacity ranging from 0.2–1.0 T/H, it is suitable for small-scale aquaculture farms, feed plants, and similar facilities. The following outlines the standard feed extrusion production process. We provide flexible process configurations and customized solutions.

Global Cases
Our extruder equipment serves a wide range of industries worldwide. Below are examples of actual projects involving this equipment. These include solutions for floating feed, sinking feed, and integrated feed plants. The equipment varies depending on specific production objectives. Please feel free to contact us for a cost-effective, high-yield solution tailored to your needs.
Auxiliary Production Equipment
In addition to single screw extruder machine, we have designed other feed production equipment. These systems provide a one-stop solution covering everything from raw material processing to final packaging. Below are some of the models most commonly used by our customers. In addition to these, we offer other models to enhance production flexibility.

Hammer Mill for Feed Raw Materials
This crusher can process feed raw materials such as corn, soybeans, and wheat—with a size of less than 5 cm—into a powdery consistency ranging from 0.5 to 20 mm, thereby improving the forming rate.

Mixer for Feed Raw Materials
This mixer ensures uniform blending of various powdered materials and additives. It is suitable for premix production and is easy to use. We offer a selection of different models.

Pellet Feed Dryer
This unit is specifically designed for feed drying. It utilizes a mesh belt and hot air circulation to achieve gentle and uniform drying of feed. It can also be used for processing various types of dried meat.

Pellet Feed Cooler
It rapidly cools the surface of pellet feed through counter-current airflow, achieving the effects of shaping and solidification. The octagonal design and slide gate minimize feed loss during unloading.
Why Choose RICH?
A Professional and Leading Manufacturer
RICHI MACHINERY is a leading global manufacturer specializing in feed pelletizers, screw extrusion machine, and biomass pelletizing equipment. With over 30 years of manufacturing expertise and project experience spanning more than 140 countries and regions, we provide global customers with complete feed production line equipment, engineering design, installation, and turnkey project services.
For more efficient service, we have established a specialized service system. By combining pre-sales and after-sales support with both online and offline channels, we provide you with the most comprehensive equipment services.
From initial consultation to final production launch, RICHI provides a one-stop, end-to-end, standardized project service system that saves you time and effort throughout the process, ensuring the smooth implementation and stable operation of your pelletizing project.
Customized Solutions

Our engineers provide exclusive design solutions, precise capacity calculations, and detailed cost estimates. We tailor equipment to your specific needs based on raw materials, production capacity, and project objectives.
Complete Turnkey Project

A one-stop solution covering factory layout planning, on-site construction, export customs clearance, end-to-end logistics, safe delivery, equipment installation, commissioning, operator training, and after-sales service.
After-Sales Support

We offer a one-year warranty on the single screw extruder machine, genuine spare parts, technical guidance, lifetime equipment upgrades and maintenance. RICHI’s experienced engineers ensure your long-term, stable production.
Frequently Asked Questions
Below are frequently asked questions about this extruder, including answers regarding the equipment’s applications and production capacity. If you have any questions about this equipment, please feel free to contact us at any time. We will provide a competitive single screw extruder price based on your specific configuration.
–
What is the difference between single screw and twin screw extruder?
Single screw extruder and twin screw extruder differ in production capacity. Single-screw extruders have a production capacity of 0.2–1.0 T/H. Twin-screw extruders can meet production capacity requirements of 0.5–12.0 T/H and above. This results in a significant difference in price between the two.
Single and twin screw extruder differ in structural design and applications. Single-screw extruders feature a simple structure and are easy to operate, making them suitable for basic feed production. Their low investment costs meet strict budget requirements.
Twin-screw extruders utilize a closely matched twin-screw structure that processes materials more effectively. Therefore, they are better suited for complex feed formulations with high protein and fat content. For large-scale production lines, twin-screw extruders are the better choice, as they offer a higher return on investment.
–
What is the difference between a single screw extruder machine and feed pellet mill?
A single-screw extruder uses high temperature and pressure to expand raw materials. It can be used to produce floating feed, sinking feed, and pet food. Its production capacity is relatively basic, making it suitable for small-scale production.
Animal feed granulators produce feed through high-temperature extrusion molding. The feed pellets they produce have a denser structure. They feature lower energy consumption and more stable production capacity. In the aquaculture feed sector, they are generally used for the production of sinking feed. We can provide high-efficiency fish feed pellet making machine and shrimp feed pellet machine.
–
What is the quality of the feed produced by this single-screw extruder?
Although this equipment has a relatively small production capacity range, it still delivers excellent performance. It utilizes a high-temperature extrusion and puffing process. This ensures the feed undergoes high-temperature sterilization and gelatinization, which is more beneficial for animal health. At the same time, it provides better digestibility and nutrient absorption.
The aquaculture feed produced by this equipment features high water resistance, which extends feeding time. This helps prevent waste and water pollution. Therefore, the feed produced by this equipment meets high-standard requirements.
–
Can this single screw extruder machine produce different types of fish feed?
This equipment is capable of producing fish feed based on standard formulations, particularly for common species such as carp, catfish, crucian carp, tilapia, and ornamental fish. By replacing the dies with different pore sizes, pellets of various diameters can be produced.
–
What is the difference between a dry type fish feed extruder and a wet type fish feed extruder?
The main difference lies in whether steam is added during production. Wet-type extruders create a high-temperature steam environment by introducing external steam during production. This allows for more thorough gelatinization of the starch in the raw materials, ensuring stable shaping and making it suitable for the production of floating feed. The feed produced in this way has better palatability and higher digestibility.
Dry-type extruders, on the other hand, do not require the addition of steam. They primarily rely on heat generated by screw shearing and friction to cook the material. This method is suitable for processing materials with low moisture content and is ideal for producing sinking feed. With a simple structural configuration and lower production costs, it is well-suited for small-scale facilities.









