Over 10,000+ customers' choice, Focus on screening industry 40+ years
Food powder screening differs significantly from general industrial powder processing. The challenges stem from the dual nature of material properties and industry standards:
Fine powder blinding – electrostatic adhesion and lumping coexist. Food powders such as powdered sugar and starch have fine particles – during screening, friction between particles readily generates static electricity. Fine powder adheres to the screen surface and gradually accumulates, forming a "powder film" that blocks the mesh. At the same time, hygroscopic materials such as powdered sugar and milk powder absorb moisture from the air during storage or screening, forming lumps that become wedged in the mesh openings and further aggravate blinding.
Strict hygiene standards – equipment must meet food‑grade requirements. Food powders are consumed directly or indirectly, placing strict demands on equipment materials and hygiene standards. All material‑contact parts must be made of food‑grade stainless steel, with dead‑corner‑free, easy‑to‑clean designs to prevent material residue and bacterial growth.
Diverse grading requirements – single‑deck equipment cannot cover all needs. Different food raw materials require different finished product fineness – starch typically requires 80‑120 mesh screening, powdered sugar can be as fine as 200 mesh or above, and seasoning powders have stricter particle size distribution standards. A machine that can only produce one specification cannot meet the needs of multi‑product production.
1. Material Characteristics – The Starting Point of Selection
The difficulty of food powder screening ultimately stems from its physical properties. Before selection, the following questions need to be clarified:
Fineness range: What is the target screening mesh of the material? Conventional food powder screening typically ranges from 20 mesh to 200 mesh – some ultra‑fine powders may require 300 mesh or above.
Hygroscopicity and lumping tendency: Materials such as powdered sugar and milk powder are hygroscopic and prone to lumping – requiring effective screen cleaning devices.
Static characteristics: Materials such as powdered sugar and starch tend to generate static electricity during screening – requiring consideration of anti‑static design or ultrasonic cleaning systems.
Hygiene grade: Food powders demand high equipment hygiene standards – all material‑contact parts must be made of food‑grade stainless steel.
2. Screening Accuracy – The Guarantee of Fineness Control
Screening accuracy directly determines the fineness uniformity and quality consistency of the finished product. Gaofu's S49 series three‑dimensional rotary vibrating sieve achieves screening accuracy up to 600 mesh (0.02 mm) , with filtration precision down to 5 microns. Grading fineness covers 5 mesh to 600 mesh , with conventional powder screening accuracy reaching over 95%. For typical food powder screening requirements, this accuracy capability provides ample margin.
3. Multi‑Deck Grading – Multiple Specifications from One Machine
Food processors typically handle multiple product varieties and fineness specifications. The equipment supports flexible configurations of 1 to 5 screen decks , enabling a single feed to simultaneously complete 2 to 6 grades of separation or filtration. For production lines requiring simultaneous output of multiple fineness specifications of food powders, this means higher efficiency and lower equipment investment.
4. Materials and Hygiene – The Bottom Line for Food Safety
Material selection for food powder screening equipment is the first line of defence for food safety. All material‑contact parts must be made of food‑grade 304 or 316L stainless steel – with mirror‑polished surfaces (Ra≤0.8μm) and no welded dead corners. The entire machine features a fully enclosed structure with food‑grade silicone seals – effectively preventing dust emission and material cross‑contamination during screening. The equipment design should comply with GMP clean production standards and support quick disassembly and cleaning.
5. Screen Cleaning Method – The Key to Ensuring Continuous Production
The most common challenge in food powder screening is blinding. Gaofu's S49 series rotary vibrating sieve offers multiple screen cleaning solutions for different material characteristics:
Bouncing ball cleaning system: Food‑grade silicone bouncing balls are installed below the screen – continuous knocking through vibration dislodges fine powder adhering to the screen and particles wedged in the mesh. Suitable for conventional food powder screening.
Ultrasonic cleaning system: For ultra‑fine powders above 300 mesh or materials prone to static and agglomeration, an ultrasonic cleaning system can be configured – high‑frequency vibration keeps fine powder in a "suspended" state on the screen surface, effectively inhibiting adhesion and blinding.
6. Screen Change Convenience – Efficiency Assurance for Multi‑Product Production
Food processors typically handle multiple product varieties – screen change efficiency directly affects production rhythm. Gaofu's S49 series rotary vibrating sieve features a separate mother‑screen / fine‑screen design – enabling a single operator to complete screen changes in just 3‑5 minutes without special tools. This design significantly reduces changeover downtime and improves equipment utilisation.
| Selection Dimension | Key Points to Consider |
| Material characteristics | Determine the fineness, hygroscopicity, static tendency, and hygiene grade of the food powder |
| Screening accuracy | Select mesh according to target fineness – S49 series covers 5‑600 mesh |
| Grading requirements | Determine the number of grades needed – select screen decks (1‑5) accordingly |
| Material requirements | All material‑contact parts must be 304 or 316L food‑grade stainless steel – compliant with GMP standards |
| Screen cleaning method | Bouncing ball for conventional materials; ultrasonic (300 mesh+) recommended for ultra‑fine powders |
| Screen change convenience | Separate mother‑screen / fine‑screen design – 3‑5 minute quick screen changes |
| Sealing structure | Fully enclosed design, food‑grade silicone seals – eliminating dust emission and cross‑contamination |
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.
