Over 10,000+ customers' choice, Focus on screening industry 40+ years
Pellet feed screening presents challenges far more complex than simply "passing through a screen":
Large throughput – high equipment capacity required. Modern feed production lines can produce several to dozens of tonnes per hour. If screening equipment lacks sufficient capacity, it becomes a direct bottleneck for the entire production line. In pellet feed screening, a single machine must offer high throughput per unit time. Gaofu's SZF series linear vibrating screen achieves single‑machine throughput of 1‑100 t/h , meeting the capacity needs of small‑scale plants producing a few tonnes per hour to large‑scale lines producing dozens of tonnes per hour.
Multiple pellet specifications – clear grading requirements. Different animal species and life stages require different feed pellet sizes – from very small particles for young animals to large pellets for adult animals, with a wide particle size range. The equipment must have multi‑stage grading capability to separate mixed material into different size fractions. Gaofu's linear vibrating screen supports flexible configurations of 1 to 5 screen decks , enabling a single machine to produce 2 to 6 different particle size fractions simultaneously.
Broken pellet and fines content must be precisely controlled. Pellet feeds inevitably generate broken pellets and fines during granulation, crushing, and conveying. If these are not effectively removed, they reduce finished product uniformity and can cause feed waste and dust pollution during feeding.
Long continuous operation – high equipment stability required. Feed production typically runs 24/7. As a critical link in the production line, the screening equipment's stability directly affects overall line utilisation.
Gaofu's SZF series feed linear vibrating screen uses dual vibrating motors operating in synchronised opposite directions. When the two motors mounted longitudinally on the screen body run in opposite directions, the lateral excitation forces cancel each other out, while the longitudinal forces are transmitted through the vibration‑transmitting body to the entire screen box, generating stable linear vibration on the screen surface. Under the combined action of excitation force and gravity, material is thrown up on the screen surface and moves forward in a straight line in a bouncing motion. Particles smaller than the screen openings pass through to the lower layer, while oversize material travels along the screen surface to the outlet, completing the grading operation.
This working principle gives the linear vibrating screen unique advantages in high‑throughput pellet feed screening:
Material moves in a straight line on the screen surface, providing a long screening path and high screen utilisation. Unlike the spiral spreading motion of circular vibrating screens, the bouncing forward motion of the linear screen causes the material bed to be continuously turned, loosened, and stratified – giving fines and broken particles ample opportunity to pass through the screen. Material flows smoothly in a straight line without accumulation – throughput far exceeds that of ordinary circular screens. The linear vibrating screen can simultaneously produce several different particle size fractions, completing multi‑stage grading in a single pass.
1. Large throughput – a single machine matches full line capacity
Gaofu's linear vibrating screen achieves single‑machine throughput of 1‑100 t/h , with screening particle size covering 0.075‑150 mm and grading efficiency of 85%‑95%. For modern feed production lines processing hundreds of tonnes per day, a single linear screen matches the capacity rhythm of the entire line. In large‑scale livestock and aquatic feed production, the linear screen – with its high‑throughput capability – has become the core screening equipment for fully automated production line operation.
2. Multi‑deck grading – multiple specifications from one feed
The equipment supports flexible configurations of 1 to 5 screen decks , with mesh openings customisable according to requirements. For pellet feed production, the upper deck intercepts large impurities and lumps, the middle decks achieve different particle size fractions, and the lower deck removes broken pellets and fines – one machine, multiple functions, reducing material transfer between units. A single machine simultaneously produces multiple particle size specifications of feed pellets, with stable and reliable classification efficiency. Gaofu's SZF‑1025 model achieves throughput of 1‑20 t/h with grading efficiency of 85%‑98%.
3. High screening accuracy – eliminating size mixing and cross‑contamination
The linear vibrating screen achieves screening accuracy of over 95%. Screened particles are uniform in size, effectively eliminating size mixing and cross‑contamination. The excitation angle can be flexibly adjusted to ensure thorough screening of feed and various materials. This high‑precision grading capability is particularly important for producers requiring multiple particle size specifications – different animal species and life stages require different feed particle sizes – the linear screen obtains multiple specifications simultaneously through one or more screen decks.
4. Fully enclosed structure – clean, dust‑free production
The equipment features a fully enclosed design that effectively prevents dust emission. A negative‑pressure extraction device can be optionally added to further improve the workshop environment. For feed production, the fully enclosed design not only meets environmental production requirements but also protects workshop cleanliness and operator occupational health. Good sealing, no dust emission, easy maintenance – suitable for automated production line operation.
5. Stable operation – suitable for 24‑hour continuous operation
Gaofu's linear vibrating screen has a well‑designed structure with simple maintenance, stable operation, and low failure rates – suitable for continuous feed plant operation. Dual‑motor power is balanced with low energy consumption – stable and reliable for long‑term continuous operation. The unique screen structure design extends screen life – simple structure, easy maintenance, quick screen changes, low failure rate. For feed production lines requiring 24‑hour continuous operation, equipment stability is a key factor in maintaining overall line utilisation.
6. Preserves pellet integrity – reducing broken material loss
The linear vibrating screen uses gentle linear vibration – no extrusion, no breakage of formed pellets – reducing broken material loss. For pellet feeds, particle breakage during screening directly affects finished product appearance and animal palatability. The gentle screening method of the linear screen effectively protects pellet integrity.
7. Material and hygiene assurance
All material‑contact parts can be made of carbon steel or stainless steel – flexibly selected according to feed production hygiene requirements. Screen mesh can be made of 304 stainless steel , complying with feed hygiene standards. The overall equipment structure is well‑designed – easy to clean internally and externally, with no dead corners.
The main technical parameters of Gaofu's SZF series feed linear vibrating screen are as follows (actual values depend on the specific model and configuration):
| Parameter | Specification |
| Model | SZF series (520/1025/1540, etc. – customisable) |
| Screen decks | 1‑5 |
| Grading fineness | 0.075‑150 mm |
| Grading efficiency | 85%‑98% |
| Throughput | 1‑100 t/h |
| Installed power | 0.75‑30 kW |
| Screen material | Carbon steel / stainless steel |
Note: The above values are for reference. Actual throughput depends on material characteristics, screen mesh size, and other factors. Pre‑purchase evaluation with your own material and operating conditions is recommended.
Applicable Scenarios
Gaofu's SZF series feed linear vibrating screen is widely used in various feed processing applications:
Livestock and poultry feed: Raw material cleaning and finished product grading for pig, poultry, duck, and other feeds;
Aquatic feed: Grading screening of fish, shrimp, and other pellet feeds;
Pet food: Grading of dry kibble – removing broken particles and dust;
Raw material pre‑treatment: Impurity removal and grading of corn, soybean meal, and other feed ingredients;
Feed additives: Screening of premixes, additives, and other powdered materials.
Food Industry Client Testimonials
Nestlé, CP Group, Haitian Flavour & Fragrance, Yihai Kerry, Yili, Mengniu,Shuanghui, Wahaha, Master Kong, Want Want, Anjoy Foods, Angel Yeast,Yangyuan Foods, Uni-President Enterprises, Qiaqia Food, Luhua Group,Alpenliebe, Golden Monkey, Orion, Xizhilang,Sanquan Foods, Synear Food, Oishi, Wong Lo Kat, Yanjing Beer, Seamild,Jinpai, Chubang, Hengshun Vinegar Industry, Longda Group, Beijing Daoxiangcun, Anhe Dairy,Weiwei Group, Xiangpiaopiao, Maiquer, Tianbing, Binqi Food, Ligao Okun
Fortune 500 Client Testimonials
CNPC、CSCEC、Sinochem Holdings、CRCC、China Minmetals Corporation、CNOOC、CR、Sinopharm、CHN Energy、COFCO Corporation、Huawei Technologies、PowerChina、CITIC Group、Wuchan Zhongda Group、NORINCO、Chalco、CNBM、 Shaanxi Coal and Chemical Industry Group、Ansteel Group、CETC、CSSC、CASC、CEC、Jinchuan Group、CASIC、Conch Cement、CNNC、SPH、Shanxi Coking Coal Group、 Zhongtai Chemical、GPHL、DEC、Sinosteel Corporation、MCC、China National Salt Industry Chemical、China Baowu Steel Group、China Animal Husbandry Industry Co., Ltd.、CECEP
About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was founded back in the 1980s. With over 40 years of development, it has been certified as a National-level Specialized, Refined, Unique & Innovative Little Giant Enterprise, National Green Factory, National High-tech Enterprise, and National Intellectual Property Advantage Enterprise, and serves as the President Unit of China Vibration Screening Industry Association.
The company is accredited with the Henan Provincial Industrial Design Center, Henan Provincial Engineering Technology Research Center for Intelligent On-line Screening System, and Xinxiang Municipal Engineering Technology Research Center for Fine Screening.
Gaofu has obtained more than 500 patents including invention patents, utility model patents and design patents, been awarded the Science and Technology Achievement Prize issued by the Ministry of Industry and Information Technology of China, and participated in drafting and formulating 4 national standards.
Gaofu's product portfolio covers multiple series and hundreds of specifications, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment and automatic material handling systems.
Core products include vibrating screens, screening machines, vibratory sifters, rotary vibrating screens, ultrasonic vibrating screens, linear vibrating screens, airflow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeding machines, dust-free feeding stations, bulk bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag-discharging filters, leaf filters, clay filters, toothed roll crushers, coal crushers and other machinery.
These products are widely applied in food, pharmaceutical, chemical, metallurgy, construction materials, mining, thermal power, environmental protection and many other industries, winning recognition and trust from over 10,000 clients worldwide.
Gaofu products enjoy strong sales across Greater China, and are exported to more than 100 countries and regions such as Russia, Canada, the United States, New Zealand, Japan, Brazil and South Africa.
Upholding the corporate mission of Improving material quality & efficiency to fully satisfy customer demands, Gaofu maintains long-term partnerships with clients to achieve win-win development.
At present, Gaofu is an official qualified supplier for numerous Fortune Global 500 enterprises, including CNPC, Sinopec, Sinochem Holdings, China Resources Group, Sinopharm Group, COFCO, China National Building Material, China Aerospace Science and Technology Corporation, Jinchuan Group and more.
Gaofu Machinery ranks No.1 in global sales volume of vibrating screens.
In May 2024, Frost & Sullivan, a world-renowned international consulting firm, issued a Market Position Verification Certificate confirming that Gaofu achieved the world's largest shipment volume of vibrating screens in the global market in 2023.
