Over 10,000+ customers' choice, Focus on screening industry 40+ years
Chocolate is a direct-consumption food product, and its production process is subject to some of the strictest hygiene regulations in the food industry. Screening equipment used in chocolate processing must meet several critical requirements:
Materials must be corrosion-resistant and non-reactive. Chocolate ingredients contain fats, acids, and moisture that can corrode ordinary carbon steel over time. Corrosion products – rust particles, metallic residues – would contaminate the chocolate, affecting both flavour and food safety. Every component that comes into contact with chocolate materials must be made of corrosion-resistant, food-grade stainless steel.
Surfaces must be smooth and free of dead corners. Chocolate has a naturally high fat content, making it sticky and prone to adhesion. If equipment surfaces have dead corners or rough finishes, chocolate residue will accumulate, potentially leading to microbial growth, oxidative rancidity, and batch-to-batch contamination. Equipment must be designed for easy cleaning and sanitisation.
Operation must be fully enclosed to prevent contamination. Chocolate is highly sensitive to moisture, odours, and airborne particles. Open screening processes expose the product to environmental contaminants and accelerate fat oxidation. Equipment must provide a sealed environment that isolates the chocolate from external factors throughout the screening process.
Food-Grade Stainless Steel: The Foundation of Hygienic Safety
Gaofu's S49 series needle-type chocolate rotary vibrating sieve is built around a food-grade stainless steel core that addresses every aspect of chocolate production hygiene:
Entire machine constructed of 304/316L stainless steel. The main body, screen frames, and all components that contact chocolate materials are made of 304 or 316L food-grade stainless steel. 304 stainless steel offers excellent corrosion resistance and oxidation resistance, capable of withstanding the acidic and fatty environment of chocolate processing. 316L stainless steel provides even higher corrosion resistance for applications with the most stringent hygiene requirements.
Mirror-polished surfaces with no dead corners. All product-contact surfaces are finely mirror-polished to achieve a sanitary-grade finish. Welds are smooth and flush with surrounding surfaces, eliminating material-trapping dead corners. This design prevents chocolate residue accumulation, inhibits bacterial growth, and makes cleaning quick and thorough.
Food-grade seals for complete enclosure. The equipment is equipped with food-grade silicone seals and features a fully enclosed cylindrical structure. The entire screening process takes place within a sealed system that prevents dust emission, isolates the chocolate from external contamination, and contains any product odours within the equipment. This design also prevents chocolate from absorbing moisture or odours from the surrounding environment.
Traceable materials with certification. All stainless steel materials are supplied with traceable material certificates, ensuring full compliance and documented quality assurance from the source.
Food-grade stainless steel provides the hygienic foundation, while filtration accuracy delivers the quality assurance. Gaofu's needle-type chocolate rotary vibrating sieve offers precision performance that meets the exacting standards of premium chocolate production:
Screening accuracy up to 600 mesh (0.02 mm). The S49 series achieves screening accuracy up to 600 mesh (0.02 mm) and filtration precision down to 5 microns. This level of precision effectively removes cocoa shell fragments, fibre particles, sugar lumps, milk powder agglomerates, and any foreign matter that could compromise the smoothness of needle-type chocolate. Screening efficiency reaches 99.56%.
Multi-deck configuration for simultaneous grading and impurity removal. The equipment supports 1 to 5 screen decks, enabling a single machine to perform 2 to 6 grades of separation or filtration simultaneously. For needle-type chocolate production, the upper deck can intercept coarse impurities and large agglomerates, while the lower decks achieve precise particle size classification – ensuring consistent raw material quality for every batch.
Three-dimensional vibration for efficient screening. The equipment uses a vertical vibration motor as the excitation source. Eccentric weights mounted at the top and bottom of the motor convert rotary motion into a three-dimensional compound motion (horizontal, vertical, and inclined). Material spreads outward on the screen surface in a spiral path, providing a long screening path and high screen utilisation. This design delivers superior filtration efficiency compared to static or single-direction screening methods.
Automatic impurity discharge for continuous operation. During screening, impurities and oversize material are automatically discharged without manual intervention. This allows the equipment to run continuously for extended periods, supporting the high-volume production demands of commercial chocolate manufacturing.
Hygienic, dead-corner-free design. The innovative structure eliminates material-trapping dead corners. The entire unit is designed for quick disassembly, thorough cleaning, and easy sanitisation – critical for chocolate production where frequent product changeovers and strict hygiene protocols are standard.
Quick screen changes in 3-5 minutes. The unique screen frame design allows screen changes in just 3-5 minutes without special tools. For chocolate manufacturers handling multiple product specifications, this rapid changeover capability significantly reduces downtime and improves equipment utilisation.
Separate mother-screen / fine-screen design extends screen life. The fine working screen is fully supported by a mother screen, distributing impact forces and extending the fine screen's service life. This reduces consumable costs over the long term and minimises the frequency of screen replacements.
Compact size for flexible installation. The equipment has a compact footprint and is easy to move. It can be flexibly positioned within the production line without occupying excessive floor space – an advantage for chocolate plants with space constraints.
Low-noise operation. The equipment operates with low noise levels, contributing to a more comfortable working environment for production staff.
Long service life of 15-20 years. Under normal operating conditions, the equipment has a service life of 15-20 years – a testament to the quality of materials and workmanship.
The main technical parameters of Gaofu's S49 series needle-type chocolate rotary vibrating sieve are as follows (actual values depend on the specific model and configuration):
| Parameter | Specification |
| Models available | S49-600 to S49-2000 |
| Effective screening diameter | Φ560 mm to Φ1920 mm |
| Number of screen decks | 1-5 |
| Screening accuracy | Up to 600 mesh (0.02 mm) |
| Filtration precision | Down to 5 microns |
| Screening efficiency | 99.56% |
| Screen change time | 3-5 minutes |
| Material (contact parts) | 304/316L stainless steel |
| Service life | 15-20 years |
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.
In needle-type chocolate production, Gaofu's S49 series rotary vibrating sieve delivers tangible improvements in several critical areas:
Enhanced product purity and consistency. Micron-level filtration effectively removes impurities, agglomerates, and oversized particles. The result is consistently pure, uniformly sized raw materials – the foundation for needle-type chocolate with a flawless appearance and superior mouthfeel.
Hygienic safety assurance. The entire 304/316L food-grade stainless steel construction, mirror-polished dead-corner-free surfaces, and fully enclosed operation eliminate contamination risks from the equipment side. The design complies with GMP standards for food production and meets the stringent hygiene requirements of the chocolate industry.
Improved production efficiency. Three-dimensional vibration for high-efficiency screening, automatic impurity discharge, and quick screen changes reduce manual intervention and downtime – supporting continuous, high-volume production.
Reduced operating costs. Long screen life (thanks to the mother-screen / fine-screen design), durable stainless steel construction, and a 15-20 year service life keep long-term operating costs under control.
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.
