Over 10,000+ customers' choice, Focus on screening industry 40+ years
Buckwheat noodles are one of the fastest‑growing coarse grain noodle products under the trend of consumption upgrading. From bitter buckwheat noodles to sweet buckwheat instant noodles, from buckwheat cold noodles to buckwheat steamed bun flour, different product categories have completely different requirements for the fineness, purity and particle size uniformity of buckwheat flour.
However, in actual buckwheat flour production, the screening and classification step is often the "bottleneck" of the entire production line.
The buckwheat milling process typically includes cleaning, magnetic separation, brushing and dust removal, dehulling, milling and sifting. In the sifting step, the intermediate product after grinding needs to be classified by particle size through screening equipment – coarse particles are returned for regrinding, fine powder goes to the next process, and acceptable flour goes to packaging. If the screening equipment cannot keep up with the milling rhythm, either material accumulates and blocks the machine, or insufficient screening results in uneven finished particle size.
Traditional classification methods either use ordinary single‑deck vibrating screens – which can only separate into two or three categories at a time, requiring multiple screening passes to complete multi‑stage classification, with long processes, multiple equipment and low efficiency – or rely on manual screen changes and adjustments – with long downtime, high labour intensity and poor batch‑to‑batch consistency. In large‑scale continuous production, neither method can match the rhythm of the production line.
Continuous classification of buckwheat flour requires screening equipment that can achieve "one feed, multiple grades out, continuous operation."
Multi‑Deck Classification Design: One Feed, Multiple Grades Out
The purpose of classification in buckwheat flour processing is clear: to separate the ground material into different particle size grades – coarse particles are returned to the mill for regrinding, intermediate grades go to packaging as finished buckwheat flour, and fine powder can be used for other purposes or as blending material.
The Gaofu S49 series buckwheat noodle rotary vibrating sieve features multi‑deck screen design , allowing flexible screen mesh configuration according to the particle size requirements of buckwheat flour to achieve fine classification from coarse to fine, ensuring uniform powder. The equipment supports 1 to 5 screen decks , enabling simultaneous separation into 2 to 6 grades with a single feed.
Typical three‑deck configuration in buckwheat flour processing:
First deck (coarser mesh): Intercepts insufficiently ground buckwheat particles and bran fragments – oversize material is returned to the mill for reprocessing, avoiding raw material waste
Second deck (target mesh): Collects the acceptable‑size finished buckwheat flour – goes to packaging or the next process
Third deck (finer mesh): Separates ultra‑fine powder – can be used for blending or other purposes
One machine, one feed – simultaneously completes the three steps of coarse particle regrinding, finished product classification and fine powder separation. For buckwheat noodle processors, the multi‑deck design means fewer machines, less floor space, and fewer material transfer points – the overall efficiency of the production line is systematically released.
Screening accuracy can reach up to 600 mesh (0.02 mm) and filtration precision down to 5 microns. From preliminary impurity removal of buckwheat raw materials to fine screening of finished powder, a single machine covers the full range of requirements.
Buckwheat noodle processing is typically continuous flow production – from cleaning, dehulling and milling to sifting and packaging, each step is closely linked. Any interruption at any point will affect the capacity of the entire production line.
The continuous operation capability of the Gaofu buckwheat noodle rotary vibrating sieve comes from three levels of design assurance:
First, automatic discharge of impurities without manual intervention. During screening, impurities and oversize material automatically move along the screen surface to the reject port and are discharged. Operators do not need to stop the machine frequently to clean the screen surface, and the equipment can run continuously for long periods.
Second, fully enclosed structure with no dust escape. The equipment features a fully enclosed sealed structure, with screening taking place inside a sealed chamber. Buckwheat flour is light and easily becomes airborne – traditional screening often allows large amounts of fine powder to disperse, causing material loss and workshop contamination. The fully enclosed design solves this problem at the source, while also effectively blocking external moisture and foreign matter from entering the screening system.
Third, anti‑blinding design for continuous operation. To address potential caking and adhesion of buckwheat flour, the equipment is equipped with a bouncing ball cleaning system that continuously taps the screen during screening, dislodging adhering material and keeping the mesh clear. The equipment can run 24 hours continuously without frequent stoppages for cleaning.
Automatic impurity discharge + fully enclosed structure + anti‑blinding cleaning – with these three assurances combined, the screening step is transformed from a "frequent‑stoppage bottleneck" into a "continuously running node."
Coarse grain processors typically have more than one product line. Sweet buckwheat flour, bitter buckwheat flour, buckwheat noodle special flour, buckwheat steamed bun flour – different products have different requirements for powder fineness.
When switching products on traditional screening equipment, screen changes often take over half an hour – removing the old screen, cleaning residual material, laying a new screen, and refastening – a time‑consuming process. If three or four varieties need to be switched in a single day, screen changes and cleaning alone can consume most of the shift.
The Gaofu buckwheat noodle rotary vibrating sieve uses a mother‑child screen frame structure , allowing screen changes in just 3 to 5 minutes. The mother screen provides structural support for long‑term use, while the child screen (working screen) is responsible for screening and can be replaced independently. Switching between different mesh sizes is convenient and efficient, greatly reducing downtime for variety changes.
For coarse grain processors that need alternating production of multiple varieties, quick screen changes mean that one production line can flexibly respond to the production needs of multiple product categories without requiring dedicated screening equipment for each variety.
Buckwheat flour is used directly in food processing, so production equipment must meet strict hygiene standards. The Gaofu buckwheat noodle rotary vibrating sieve incorporates systematic food‑grade configuration in material selection and structural design:
Food‑grade stainless steel. All material‑contact parts are made of food‑grade stainless steel , with finely polished surfaces, no hygiene dead corners, and easy to clean. This eliminates the risk of metal contamination and ensures the purity of the buckwheat flour.
Fully enclosed sealed structure. The equipment has a fully enclosed design, effectively preventing dust escape and material moisture absorption during screening. The fully enclosed structure also blocks external moisture and foreign matter from entering the screening system, ensuring the food safety of the buckwheat flour.
Dead‑corner‑free design. The simple structure has no hygiene dead corners and supports rapid disassembly for cleaning. When switching between different varieties, equipment cleaning is more thorough and efficient, effectively preventing cross‑contamination.
The equipment complies with food GMP standards, helping coarse grain processors present a more convincing compliance record during food safety audits.
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
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.
