sinkING FISH FEED MACHINE
“Sinking Fish Feed Machine” is the equipment designed to produce sinking fish feed pellets. It helps achieve stable sinking, water resistance, and high palatability based on your formula and target density.
Bottom-feeding fish (like grass carp, silver carp, bighead carp, crucian carp, black carp, etc.) usually eat in the middle or lower layers of the water. So, sinking fish feed needs to sink quickly, not break apart easily in water, and keep its nutrients intact. The sinking fish feed machine is specifically built around these core needs.
To help customers find suitable solutions for different markets and budgets, RICHI offers two types of sinking fish feed machines:
Sinking Fish Feed Pellet Machine
RICHI SZLH series fish feed pellet machine is mainly used for the production of animal feed pellets for aquatic products, livestock and poultry, ruminants, etc. It has humanized design and simple operation. It is currently widely used in various animal feed and aquatic feed pellet mill, as well as aquaculture farms and animal breeding plants.


Casting Manufacturing
+
The active transmission box is a casting with high hardness, large load-bearing capacity and long service life.

Stainless steel
+
The main parts such as modulator and ring die are made of stainless steel, which is corrosion-resistant.

Gear Transmission
+
The main transmission system adopts gear transmission, which has high efficiency and high capacity.

Powder spraying process
+
The appearance adopts powder spraying process, first spraying powder, then electric baking, and then drying.

Siemens motor
+
The main motor uses a Siemens motor.

Inverter motor
+
The feeding system adopts stepless frequency conversion motor control, which is convenient for adjusting the feeding speed.
Working Principle

First, raw materials like fish meal and soybean meal are mixed and conditioned.
Then, a feeding system sends them into the pelleting chamber. The material is forced through the holes of a ring die by pressing rollers, forming column-shaped pellets.
Finally, a cutter cuts them to the desired length. After cooling, you get high-density sinking feed pellets that ensure rapid sinking in water.
Applications

Ideal for producing hard, sinking pellets for bottom-feeding fish such as grass carp, crucian carp, black carp, common carp, and tilapia.
Also suitable for manufacturing regular or specialty aquatic feed that requires stable, high-density properties.
Advantages and Features

Controllable Density: Ensures pellets sink quickly, reducing waste and water pollution.
Improved Safety: High-temperature conditioning kills harmful bacteria, improving feed safety and extending its shelf life.
Flexible Size: Pellet size can be easily adjusted to match different fish growth stages.
High Efficiency: A single machine can produce 0.5-30 tons per hour, meeting the needs of large-scale farming operations.
SHRIMP FEED PELLET MACHINE PARAMETERS
Below is the parameter table for some models of the SZLH series sinking fish feed pellet mill. In addition to these standard models, we support customization with various dies and production capacities.
| Model | Capacity (t/h) | Main motor power (kw) | Feeder power (kw) | Conditioner power (kw) | Ring die diameter (mm) |
|---|---|---|---|---|---|
| SZLH250 | 1~2 | 22 | 1.1 | 1.5 | 250 |
| SZLH320 | 3~4 | 37 | 1.5 | 4 | 320 |
| SZLH350 | 5~7 | 55 | 1.5 | 4 | 350 |
| SZLH420 | 10~12 | 110 | 1.5 | 7.5 | 420 |
| SZLH508 | 15~16 | 160 | 1.5 | 7.5 | 508 |
| SZLH558 | 20~22 | 185 | 1.5 | 11 | 558 |
| SZLH678 | 30~33 | 250 | 1.5 | 11 | 673 |
| SZLH768 | 38~40 | 315 | 2 | 11 | 762 |
SHRIMP FEED EXTRUDER MACHINE
If your products need to cover many kinds of aquaculture species, or you want to take care of both shrimp and fish markets at the same time, the shrimp feed extruder can help. It works well with different types of feed and gives you a flexible and useful way to produce.


Screw
+
The feeding system uses a uniquely designed silo to prevent agglomeration and sedimentation.

Extrusion chamber
+
Adopts a bimetallic expansion chamber sleeve to reduce wear and ensure long-term stable operation of the equipment.

Mobile cutter stand
+
The cutting part adopts movable cutter seat, and the blade is made of spring steel, which fits the template better.

Saturated hot steam
+
Injecting saturated hot steam into the modulator and using steam heating can significantly reduce costs and increase capacity.

Automatic Control
+
The whole equipment adopts a fully automatic control system to improve production efficiency.

Siemens motor
+
The main motor is equipped with Siemens motor to ensure the quality of the entire equipment.
Working Principle

Mixed ingredients are moistened with water or steam and then fed into an extrusion chamber.
Inside, a high-speed rotating screw pushes, heats, and cooks the material.
Finally, it’s pushed through a specific die and cut into pellets of a set length.
This process allows you to control the density, creating feed that can either slowly sink in the middle layers or drop quickly to the bottom, meeting different needs.
Applications

Ideal for producing high-quality feed for bottom-feeding fish like grass carp, crucian carp, black carp, and silver/bighead carp.
It can make standard sinking pellets, as well as special formulas that sink slowly or have better palatability.
Suitable for medium-to-large-scale fish feed plants and professional operations focusing on high quality and diverse formulas.
Advantages and Features

Controllable Pellet Density: The extrusion process lets you adjust density for different fish growth stages.
High Water Stability: Pellets hold their shape in water, keeping nutrients intact.
Easily switch between different formulas and specifications to meet market demands.
Designed for continuous, large-scale output, lowering labor costs.
The machine’s design is optimized for simple cleaning and daily upkeep.
Sinking Fish FEED EXTRUDER MACHINE PARAMETERS
Below are some models of sinking fish feed extruder machines (customization supported). You can choose the appropriate model based on your current daily feed consumption.
| Model | Capacity (t/h) | Main motor power (kw) | Feeder power (kw) | Conditioner power (kw) | Screw diameter (mm) |
|---|---|---|---|---|---|
| DGP-90B | 0.3~0.4 | 37 | 0.75 | 90 | |
| DGP-120B | 0.5~0.6 | 55 | 2.2 | 120 | |
| DGP-160B | 0.8~1.0 | 90 | 3 | 160 | |
| DSP-90B | 0.5~0.6 | 37 | 7.5 | 1.1 | 90 |
| DSP-135B | 0.8~1.0 | 75 | 7.5 | 2.2 | 135 |
| SPHS75*2 | 0.5~1 | 55 | 1.5 | 7.5 | 75 |
| SPHS120*2 | 1.5~2 | 90 | 1.5 | 11 | 120 |
| SPHS120*2 | 3~4 | 110 | 1.5 | 11 | 120 |
| SPHS 150*2 | 5~6 | 200 | 1.5 | 11 | 150 |
| SPHS185*2 | 10~12 | 355 | 2 | 11 | 185 |
COMPLETE sinking fish FEED PRODUCTION PROCESS
The fish sinking fish feed pellet machine orfish feed extruder machine is the core equipment in the process of producing fish sinking feed pellet. However, in order to industrially produce fish sinking feed pellet, medium or large aquaculture farms and feed pellet mill usually equip a complete aquatic feed production line according to their own production needs.
As professional sinking fish feed machine manufacturer, RICHI has designed turnkey feed production lines for thousands of customers. With rich experience in project design and project construction, it can provide customized fish sinking fish feed production line solutions for each customer.
The process flow of the standard fish feed production line is((Not every feed production project needs to be equipped with all of the following sections. All of our sections are modular in design and can be added or reduced according to your raw materials, capacity, plant size, degree of automation, etc.)

CURRENTLY, OUR SINKING FISH FEED EXTRUDER MACHINES ARE COMMONLY USED TO–
The application range of our sinking fish feed machines isn’t limited to just sinking fish feed.
PROJECT OF Sinking fish FEED Feed PRODUCTION
RICHI feed pellet machine is widely welcomed in domestic and overseas markets. Currently, RICHI’s feed production projects and pellet production projects are spread over more than 120 countries and regions around the world, covering various production lines such as 1-60 tons per hour of livestock and poultry feed, high-end aquatic feed production line, etc.
With professional attitude and excellent quality, we deliver every feed production project to our customers!
FAQ ABOUT SINKING FISH FEED MACHINE
If you have any questions about sinking fish feed equipment and sinking fish feed production, you can first take a look at these answers.
1. I need Sinking Fish Feed Machine,What is the price of fish feed extruder?
+
The price of our fish sinking fish feed machine is between 8000-100000 USD. The reason why we did not give you a definite price directly is that the price of sinking fish feed machine with different output and different configuration is different.
So first we need to communicate with you and understand your specific needs before we can recommend you the appropriate sinking fish feed production machine and tell you the exact price of fish sinking feed production machine.
2. I need to build a small fish feed plant, what equipment do I need?
+
The main equipment of the sinking fish feed pellet mill is the production equipment needed for the sinking fish feed production line. The conventional sinking fish feed production line needs to use: feed crusher, feed mixer, feed pelletizer, feed dryer, feed cooler, packing equipment, etc.
In addition to these equipment, some auxiliary equipment is also needed, such as screening equipment, conveying equipment, etc. What equipment is needed on the entire fish feed production line still needs to be equipped according to your needs.
In addition to feed production machine, fish feed pellet mill building needs to be built. After the fish feed production plan is determined, the factory building can be built according to the production plan.
3. Can the pellet mills used to produce poultry feed also be used to produce fish feed ?
+
No. Both single-layer and double-layer feed pellet machines can be used to produce poultry feed. However, if you need to produce fish sinking feed, considering the requirements of sinking fish feed on the degree of maturity and the feeding characteristics of fish, a feed pellet machine with a double-layer feed pellet machine is generally required.
Therefore, not all pellet machines used to produce poultry feed can be used to produce sinking fish feed.
4. Do you have an office in Vietnam? I would like to communicate directly with local staff.
+
We do not have an office in Vietnam. Once customers contact us, we will ask the sales manager responsible for the area to contact you and communicate the detailed information about the feed production machine you need.
You can also come to our factory directly. Our sales manager and technical engineer can take you on a field tour and explain our feed production equipment to you. In this way, the communication efficiency between us will be faster.
We welcome every customer to visit our factory for communication at any time.
STIL WANT TO FIND——?
Not interested in sinking fish feed machine for now? That’s okay!
We also have a variety of other feed production machines to choose from, such as floating fish feed machines, shrimp feed making machines and pet food extruder. There is always one that can meet your farming or processing needs.

Floating Fish Feed Machine For Sale
Make uniform, floating pellets for all fish species.

Pet Food Extruder
Produce nutritious pet food with flexible shapes and recipes.

Wet Type Extruder
Can produce floating/sinking/slow-sinking feed pellets.

Aqua Feed Making Machine
High-efficient manufacturing process for extruded fish, shrimp, and crab feed pellets.
INSIDE RICHI MACHINERY
Our business centers on aquatic feed machinery. We don’t just research, develop, and manufacture core equipment like fish feed extruders, fish/shrimp feed pellet machines, and pet food extruders. Plus, we offer complete feed production solutions, helping you set up fully integrated plants for producing fish/shrimp feed or dog & cat food. Through top-quality products and services, we’re reshaping the global image of ‘Made in China’.
30
RICHI Machinery
has been around for 30 years
We are a top maker and supplier of machines
forfish/shrimp/crab feed and pet food.
For many yearsour fish/shrimp feed equipment have reached theUSA,
Canada, Russia, Uzbekistan, Ukraine,
lranIndonesia, Romania, Angola, Pakistan, Ethiopia, theUK, etc.
300+
We have helped build hundreds of
fish/shrimp feed
production lines from scratch.
International Certification
All our equipment has passed ISO9001:2008, CE,
CU-TR
and other certifications.
140+
Our feed pelletizing equipment has been sold to
more than 140 of the
more than 200 countries and regions in the world
1000+
We now offer our
related services to so many feed
producers worldwide.





























