Over 10,000+ customers' choice, Focus on screening industry 40+ years
In the production of dairy products such as infant formula, adult nutritional powder and whey protein powder, bag opening and feeding is the first process step, and also the most easily overlooked link in food hygiene control.
Milk powder typically enters the production workshop in 25 kg bags. At the moment a worker opens the packaging bag and pours the milk powder into the feed port, a series of hygiene risks arise: dust and microorganisms adhering to the outer surface of the bag during storage and transport may fall into the material as the bag is opened; dust generated during bag opening disperses into the workshop air, causing both material loss and providing a carrier for microbial attachment; and milk powder is rich in protein and fat, making it an ideal medium for microbial growth – any residual material in a hygiene dead corner can become a breeding ground for bacteria.
According to GB 14881 "National Food Safety Standard – General Hygienic Practice for Food Production", food production equipment must be easy to clean and sanitise, structures must avoid hygiene dead corners, and materials in contact with the product must comply with food contact material safety standards. For a highly nutritious powder with stringent hygiene requirements such as milk powder, the equipment design at the bag opening and feeding stage directly affects the microbial indicators and food safety of the entire batch.
The Gaofu Machinery milk powder feeding station is a specialised machine designed specifically to meet the hygiene requirements of milk powder bag opening and feeding. With its fully enclosed negative pressure structure, food‑grade stainless steel construction and dead‑corner‑free design, it provides systematic assurance for clean milk powder production from the very first step.
Milk powder bag opening and feeding has its specific operating scenario: 25 kg bags, manual bag opening, pouring, and empty bag disposal. The Gaofu feeding station is fully adapted to this scenario, with targeted optimisation at both the operating method and equipment structure levels.
Feeding Platform Adapted for Bagged Bag Opening
The height and opening dimensions of the feeding platform are designed according to the bag opening operation for standard 25 kg bags of milk powder. Operators place the bagged milk powder on the grille of the feeding platform and complete bag opening and pouring inside the sealed chamber. The feeding platform can accommodate different packaging bag specifications, reducing the bending range and labour intensity of operators.
Sealed Chamber Isolating the Dust Source
Bag opening and feeding are completed inside a sealed chamber. The chamber features a fully enclosed structure with a dust cover and sealing strip at the top, physically isolating the dust source from the workshop environment. A large viewing port is provided on the chamber, allowing operators to observe the feeding status in real time and adjust the operating rhythm accordingly. For production lines that need to connect to a workshop dust extraction system, the chamber can be equipped with an optional dust extraction port, enabling negative pressure dust extraction inside the equipment to be linked with the workshop dust collection system.
Negative Pressure Dust Collection for Directional Dust Capture
The dust collection fan operates continuously, creating a stable negative pressure environment inside the feeding platform and the sealed chamber – the milk powder dust generated at the moment of bag opening is drawn into the filtration system before it can disperse. Dust collection efficiency can reach 99.9%, and workshop dust concentration can be controlled to ≤0.1 mg/m³. This value is far below the national limit for airborne dust concentration inside workshops, providing reliable technical support for dairy enterprises to meet environmental and GMP compliance requirements.
Pulse Reverse Cleaning for Material Recovery
The equipment is equipped with a pulse reverse‑cleaning dust removal device. When the dust adhering to the filter cartridges reaches a certain thickness, the system automatically triggers a compressed air pulse, shaking off the dust and recovering it into the hopper. 100% of the collected dust is recovered, and material loss can be controlled to ≤0.5%. For high‑value raw materials such as milk powder, reduced material loss directly translates into improved production efficiency.
3.1 Food‑Grade Stainless Steel – Eliminating Metal Contamination
All parts of the equipment that contact material are made of food‑grade 304 stainless steel, with 316L stainless steel available upon request. The lactose and lactic acid components in milk powder have a certain corrosive effect on metals. Ordinary carbon steel tends to rust after prolonged contact, and rust particles mixed into the product would directly cause a food safety incident. 304 stainless steel offers good corrosion resistance and oxidation resistance, does not release harmful substances into the material, and eliminates the risk of metal contamination at the material source.
Dead‑Corner‑Free Design – Preventing Microbial Growth
All internal corners of the equipment feature rounded transitions, and welds are ground smooth – no hygiene dead corners. The whole machine has a simple structure with nowhere for material residue to hide. The equipment supports rapid disassembly for cleaning, and the dead‑corner‑free structure allows cleaning operations to cover every area of the internal walls. During batch changeovers, residual material is greatly reduced, cleaning efficiency is significantly improved, and cross‑contamination is effectively prevented.
Fully Enclosed Sealing Structure – Blocking External Foreign Matter and Moisture
The equipment uses a fully enclosed structural design with food‑grade silicone seals. The fully enclosed design provides three assurances: dust, hair, insects and other foreign matter in the outside air cannot enter the feeding system; external moisture is effectively blocked, preventing the milk powder from absorbing moisture and caking during feeding; and when switching between different batches or formulations of milk powder, the fully enclosed structure combined with the dead‑corner‑free design enables thorough cleaning and effectively isolates residual material.
Built‑In Vibrating Screen – Foreign Matter Interception Completed Simultaneously with Feeding
Milk powder raw materials may contain foreign matter such as packaging threads, sealing debris and moisture‑induced lumps. The Gaofu feeding station is equipped with a vibrating screen (safety screen) below the feed hopper. After material passes through the feed port, it first undergoes online screening – lumps and debris larger than the mesh openings are effectively intercepted, while acceptable material continues to the next process. This design integrates the two steps of "feeding" and "impurity removal" into a single machine. Milk powder completes foreign matter interception before entering the production line, reducing the risk of finished product foreign matter complaints at the source.
Specific Compliance with Food Hygiene Standards
The Gaofu milk powder feeding station was systematically designed from the outset around food hygiene requirements, meeting relevant standards in the following aspects:
Material compliance. Material‑contact parts are made of SUS304 stainless steel as standard, with 316L stainless steel available upon request. Materials comply with food contact material safety standards.
Structural compliance. The whole machine features a dead‑corner‑free design, with both internal and external surfaces easy to clean. All welds are finely ground, and the equipment supports rapid disassembly for cleaning, meeting GB 14881 requirements for food production equipment that is easy to clean and sanitise.
Sealing compliance. The fully enclosed silicone sealing structure ensures no dust escape. Seal materials meet food‑grade requirements and are corrosion‑resistant and aging‑resistant.
Cleaning validation support. The quick‑release design allows screens, seals and other wearing parts to be quickly removed for routine cleaning, maintenance and cleaning validation. Cleaning effectiveness can be verified through visual inspection, sampling and testing – providing equipment‑level support for GMP audits.
Explosion‑proof safety configuration (optional). Milk powder dust is combustible. The equipment can be equipped with an explosion‑proof electrical control system to meet the requirements for use in dust explosive environments.
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.
