Over 10,000+ customers' choice, Focus on screening industry 40+ years
Protein powder screening presents challenges far more complex than simply "passing through a screen."
The conflict between throughput and accuracy. When processing powdered materials such as soy protein isolate, pea protein, and whey protein, traditional circular vibrating screens often face a dilemma – increasing feed rate to pursue capacity causes screening accuracy to decline; maintaining accuracy by controlling throughput means production cannot keep pace with the line's rhythm. Circular vibrating screens, limited by screening area and material motion trajectory, tend to suffer from excessive material bed thickness and insufficient fine particle passage under high‑throughput conditions.
Blinding disrupts continuous production. Protein powder is fine and lightweight – during screening, it tends to adhere to the screen surface due to electrostatic attraction. Whey protein powder, with particle fineness down to 43 microns, is particularly prone to blinding if not carefully managed – leading to frequent stoppages for cleaning that seriously disrupt continuous production rhythm.
Gaofu's SZF series linear vibrating screen uses dual vibrating motors operating in synchronised opposite directions. When the two motors run in opposite directions, the lateral excitation forces cancel each other out, while the longitudinal forces are transmitted to the entire screen box, generating stable linear vibration on the screen surface. Material is thrown up on the screen 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.
This working principle gives the linear vibrating screen unique advantages in high‑throughput processing:
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 ample opportunity to pass through the screen. Single‑machine throughput reaches 15‑500 t/h , suitable for both small‑batch fine screening and large‑scale continuous production line operations.
High throughput does not mean sacrificing accuracy. Gaofu's SZF series linear vibrating screen delivers stable classification in the following ways:
1. Flexible multi‑deck screen configurations – multi‑stage grading in one pass
The equipment supports flexible configurations of 1 to 5 screen decks , enabling a single machine to produce 2 to 6 different particle size fractions simultaneously. For protein powder processing, the upper deck intercepts lumps and foreign matter, the middle decks achieve fine classification, and the lower deck acts as a safety screen to ensure finished product purity. Screening accuracy reaches over 95% , effectively eliminating size mixing and cross‑contamination, ensuring uniform particle size and consistent purity. Screened protein powder particles are uniform in size with high screening accuracy.
2. Wide screening particle size coverage – adaptable to different fineness requirements
The linear vibrating screen covers a screening particle size range of 0.074‑5 mm , with screen mesh range of 8‑120 mesh (up to 400 mesh) . Protein powder typically requires 24‑120 mesh screening – the linear screen's mesh coverage fully meets the full‑range needs of protein powder from coarse screening to fine classification. In soy protein powder screening, material larger than the specified mesh size is retained, while material smaller than the mesh openings falls to the lower deck for discharge – achieving precise classification.
3. Adjustable angle – adaptable to different material characteristics
The equipment features an adjustable excitation angle – the screen surface inclination can be adjusted according to material characteristics and grading requirements. For free‑flowing protein powder particles, the angle can be increased to raise throughput; for materials with high fines content, the angle can be decreased to extend the screening path and improve grading accuracy.
4. Fully enclosed structure – ensuring food hygiene and safety
As a food ingredient, protein powder has strict hygiene and safety requirements throughout production. Gaofu's linear vibrating screen features a fully enclosed design that prevents dust from escaping during operation. All material‑contact parts can be made of SUS304 or SUS316L stainless steel , meeting food industry hygiene standards. The fully enclosed frame, combined with a negative‑pressure dust extraction interface, effectively suppresses dust emission and improves the working environment. Internal and external surfaces are easy to clean with no dead corners.
Protein powder production typically operates continuously – the processing speed of screening equipment directly affects the rhythm of the entire production line.
1. Large screening area provides the physical foundation for high throughput
Gaofu's SZF series linear vibrating screen offers various screen sizes from 500×2000 mm to 1500×4000 mm. A larger screening area means more space for material dispersion and more opportunities for particles to pass through the screen. In high‑throughput protein powder screening, a larger screening area directly translates to higher throughput per unit time.
2. Automatic discharge supports 24‑hour continuous operation
The equipment features automatic discharge design – during screening, impurities and oversize material are automatically discharged from the reject outlet without manual intervention. The fully enclosed structure with automatic discharge makes the equipment suitable for continuous production line operation. For protein powder production lines requiring 24‑hour continuous operation, this means less downtime and higher equipment utilisation.
3. Quick screen changes reduce downtime
Screens use a tensioned installation structure – replacements can be made quickly without special tools. Reduced screen change time directly shortens downtime during product changeovers or screen maintenance, increasing effective equipment operating time.
As a food powder, protein powder places special requirements on screening equipment materials and hygiene standards.
Food‑grade stainless steel construction ensures product purity. All parts that directly contact protein powder are made of SUS304 or SUS316L stainless steel , ensuring no heavy metal contamination during screening and no material contamination. The equipment meets food and pharmaceutical industry hygiene standards.
Low energy consumption and low noise – suitable for long‑duration operation. The vibration motors are optimised for low noise, low energy consumption, and long service life – ensuring 24‑hour continuous stable operation. Low energy consumption helps reduce long‑term operating costs.
Robust structure with easy maintenance. The entire machine is constructed of high‑quality carbon steel or 304/316 stainless steel – robust, corrosion‑resistant, and durable. The equipment is easy to maintain with low failure rates.
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.
