Over 10,000+ customers' choice, Focus on screening industry 40+ years
Soy milk is one of the largest‑volume categories in the plant‑based beverage market. From traditional bulk soymilk to modern cartoned soy milk, and from plain soy milk to flavoured varieties, end‑consumers have increasingly high expectations for soy milk texture – fine, smooth and free from grittiness have become the basic threshold for good soy milk.
However, from soy bean grinding to finished product filling, there is one step that directly determines whether soy milk can meet this standard – pulp‑liquor separation.
After soaking and grinding, the soy slurry contains a large amount of solid impurities: okara fibre, soy skin fragments, insufficiently ground bean particles, and flocculent agglomerates formed by protein and fibre. The coarse filter screen built into the grinder can only complete preliminary separation, leaving a large amount of fine fibre and impurities still suspended in the slurry. If these impurities are not thoroughly removed, the soy milk will develop sediment and stratification, taste rough, and may even block downstream high‑pressure homogenisers, sterilisers and filling equipment.
The difficulty of soy milk filtration lies in the particularity of the material itself. Soy milk is a non‑Newtonian fluid whose viscosity changes with shear rate. The fibre in okara is fine, long and highly adhesive, easily becoming trapped in the screen mesh – ordinary filtration equipment often requires stoppage for cleaning after just ten minutes of operation. In addition, soy milk contains proteins and oils, which tend to foam during filtration, further increasing the difficulty.
To address these pain points in soy milk filtration, the Gaofu S49 series soy milk rotary vibrating sieve, with three‑dimensional gyratory motion as its core technology and food‑grade 304 stainless steel and a fully enclosed structure as hygiene safeguards, provides a professional and efficient liquid filtration solution for soy milk producers.
The Gaofu S49 series soy milk rotary vibrating sieve uses a vertical vibration motor as the excitation source, with eccentric weights installed at the upper and lower ends of the motor shaft converting the rotational motion into compound motion in horizontal, vertical and tilting directions – known as "three‑dimensional motion" – which is then transmitted to the screen deck. By adjusting the phase angle of the upper and lower weights, the motion trajectory of the material on the screen surface can be changed to suit soy milk slurries of different viscosities and impurity contents.
The value of this three‑dimensional gyratory motion for soy milk slurry filtration lies in three aspects:
First, rapid spreading of the slurry to reduce apparent viscosity. Soy milk is a non‑Newtonian fluid whose viscosity changes with shear rate. The high‑frequency, low‑amplitude excitation force causes the soy milk to spread quickly into a thin layer on the screen surface, reducing apparent viscosity and allowing the liquid to pass through the screen rapidly. The slurry moves in a spiral outward trajectory on the screen surface, flowing smoothly without accumulating.
Second, automatic discharge of okara for continuous operation without stoppage. The okara, soy skin fibres and solid impurities retained on the screen surface move along the screen under vibration and are automatically discharged from the reject port. Impurities and oversize material are discharged automatically without manual intervention, enabling continuous operation.
Third, high filtration accuracy suitable for different soy product requirements. The equipment can achieve filtration precision down to 5 microns and screening fineness up to 600 mesh or 0.02 mm. For tofu production, 100 to 200 mesh screens are typically used; for products such as soy milk film, dried tofu and bean curd sticks, 200 to 300 mesh screens are required. The Gaofu soy milk rotary vibrating sieve allows flexible screen mesh configuration according to the fineness requirements of different products – from coarse de‑slagging to fine purification, a single machine covers the full range.
High‑Frequency, Low‑Amplitude Vibration for Non‑Newtonian Fluids
The difficulty in soy milk filtration lies in its non‑Newtonian fluid characteristics. The low‑frequency, high‑amplitude vibration of ordinary screening machines cannot effectively reduce the apparent viscosity of soy milk, causing the slurry to accumulate on the screen surface, flow slowly and result in low filtration efficiency.
The Gaofu soy milk rotary vibrating sieve uses a high‑frequency vibration motor that generates high‑frequency, low‑amplitude excitation force. This vibration mode causes the soy milk to spread rapidly on the screen surface, reducing apparent viscosity and allowing the liquid to pass through the screen quickly. Solid impurities such as okara and soy skin fibres are propelled forward by the vibration, achieving continuous automatic discharge. Compared with ordinary screens, throughput is increased by 30% to 50% .
Fully Enclosed Structure – Splash‑Proof and Contamination‑Proof
During vibratory filtration, the soy milk slurry tends to splash out from the feed port, causing material waste and workshop contamination. The Gaofu soy milk rotary vibrating sieve features a fully enclosed structure , with the filtration process taking place inside a sealed chamber to prevent splashing. The fully enclosed design provides three assurances: preventing splashing and leakage, keeping the workshop environment clean; effectively blocking external foreign matter and dust from entering the filtration system, ensuring the purity of the soy milk; and reducing material loss, improving raw material utilisation.
The equipment complies with food GMP standards, and the fully enclosed design ensures no dust escape, meeting the hygiene requirements of the food industry.
Food‑Grade 304 Stainless Steel – Hygienic with No Dead Corners
Soy milk is used directly in food and beverage processing, so equipment materials must meet strict hygiene requirements. All material‑contact parts of the Gaofu soy milk rotary vibrating sieve are made of food‑grade 304 stainless steel , with 316L stainless steel available upon request.
The internal surfaces are precision‑polished, with no sharp edges or weld spatter, no hygiene dead corners, and no material retention. Seals are made of food‑grade silicone, complying with national food safety standards. The equipment supports rapid disassembly for cleaning, easily meeting food production licensing audits and routine hygiene management requirements.
Automatic Discharge of Impurities – Continuous Production Line Operation
After traditional filtration equipment runs for a period, filter cake accumulates on the screen surface and requires stoppage for cleaning. With the Gaofu soy milk rotary vibrating sieve, impurities such as okara and soy skin fibres automatically move along the screen surface to the reject port and are discharged. The equipment can run 24 hours continuously without frequent stoppages for cleaning.
The discharge ports can be rotated 360° around the axis, facilitating the arrangement of auxiliary equipment. Regardless of workshop layout, it can flexibly connect to upstream and downstream equipment, adapting to the installation requirements of different production lines.
Quick Screen Change – Adapting to Multi‑Variety Production
Different soy products require different filtration fineness. Tofu production typically uses 100 to 200 mesh screens, while soy milk film, dried tofu and bean curd sticks require 200 to 300 mesh screens. The Gaofu soy milk rotary vibrating sieve features a quick‑change screen structure, allowing screen changes in just 3 to 5 minutes. When switching between different products, screen changes are convenient and efficient, greatly reducing downtime.
The Gaofu S49 series soy milk rotary vibrating sieve is suitable for multiple filtration stages in soy milk and soy product production:
Coarse filtration after grinding. After soaking and grinding, the soy slurry contains a large amount of coarse okara and soy skin fragments. The rotary vibrating sieve performs coarse filtration immediately after grinding, removing large‑particle solid impurities and providing clean slurry for subsequent cooking and fine filtration.
Fine filtration before cooking. Before cooking, the slurry undergoes fine filtration to remove fine residues and fibres left after soaking and grinding, protecting the cooking equipment from scorching.
Cooked soy milk filtration. Cooked soy milk contains dark burnt particles and protein flocculates generated by heating. The rotary vibrating sieve effectively removes these impurities from the cooked soy milk, ensuring a smooth texture.
Final filtration before filling. The last filtration step before soy milk filling ensures the fineness of the soy milk before packaging, enhancing the consumer texture experience.
Okara recovery. By adjusting the screen mesh size (typically 60 to 120 mesh), residual liquor in the okara can be further recovered, improving raw material utilisation and reducing production costs.
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.
