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, feeding is the first step and the most challenging stage for dust control and material protection.
Pain Point 1: Dust dispersion. Milk powder particles are extremely fine, typically between 100 and 200 mesh, with some ultra‑fine products reaching 500 mesh or finer. At the moment a worker opens a 25 kg bag and pours the milk powder into the feed port, a large amount of fine powder rapidly disperses into the air, forming a visible "dust cloud." This dust not only causes raw material loss – the portion that drifts away from every tonne of milk powder represents a direct economic loss – but also creates occupational health risks. Milk powder dust is classified as "other dust," and long‑term exposure places a continuous burden on the respiratory systems of operators. At the same time, milk powder is listed in the "Catalogue of Key Combustible Dusts in the Industrial and Trade Sectors," and its dust poses an explosion risk when it reaches certain concentrations in the air.
Pain Point 2: Material contamination. Milk powder is rich in protein and fat, making it an ideal medium for microbial growth. Under traditional open feeding methods, milk powder is directly exposed to the workshop air during bag opening and pouring. External dust, hair and microorganisms may fall into the material; dust and debris on the surface of packaging bags may also mix into the milk powder; and if the feeding equipment has hygiene dead corners, residual milk powder can rapidly breed bacteria and mould at room temperature, contaminating subsequent batches.
Dust dispersion and contamination – one relates to occupational health and safety, the other to product quality and compliance – both must be solved simultaneously.
To address dust dispersion during feeding, the Gaofu milk powder feeding station provides systematic control at two levels: "source control" and "process enclosure."
Fully Enclosed Negative Pressure Feeding Structure
The equipment uses a fully enclosed bag‑opening and feeding structure, with the feed platform located inside a sealed chamber. Workers complete bag opening and pouring operations inside the sealed chamber, physically isolating the external environment from the dust source.
The dust collection fan operates continuously, creating a stable negative pressure environment at the feed port – the milk powder dust generated at the moment of bag opening is drawn into the filtration system before it can disperse. After passing through high‑density filter cartridges, clean air is discharged while the dust is collected.
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, and far better than the occupational exposure limit requirements for feeding stations in the dairy industry.
Pulse Reverse‑Cleaning Self‑Cleaning System
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. This automatic reverse‑cleaning mechanism delivers three benefits:
First, the filter cartridges maintain high permeability. There is no need for frequent manual filter cleaning, and the dust collection system always operates at high efficiency.
Second, 100% material recovery. All collected dust is recovered into the hopper, 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 economic benefits.
Third, secondary dust dispersion is avoided. Automatic reverse cleaning replaces manual filter cleaning, eliminating the secondary dust pollution generated during manual ash removal.
To address material contamination risks during feeding, the Gaofu feeding station builds a protection system from three dimensions: material selection, structural design and sealing method.
Food‑Grade Stainless Steel – Eliminating Metal Contamination
All parts of the equipment that contact material are made of food‑grade 304 stainless steel. 304 stainless steel offers good corrosion resistance and oxidation resistance, and does not release harmful substances into the material. 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 eliminates the risk of metal contamination at the material source.
For production lines requiring even higher cleanliness – such as infant formula production – 316L stainless steel is available, offering even greater corrosion resistance.
Dead‑Corner‑Free Design – Preventing Microbial Growth
Milk powder is rich in nutrients, and residual material can easily breed bacteria and mould at room temperature. 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. 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:
Prevention of foreign matter intrusion. Dust, hair, insects and other foreign matter in the outside air cannot enter the feeding system, and the milk powder is not contaminated by the external environment during feeding.
Moisture and caking prevention. Milk powder is highly hygroscopic. The fully enclosed structure effectively blocks external moisture from entering the feeding system, preventing the milk powder from absorbing moisture and caking during feeding.
Cross‑contamination prevention. 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.
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. Physical hazards in milk powder production – string ends, paper debris, metal fragments – are effectively removed at this stage.
The explosion risk of milk powder dust is an unavoidable safety issue for dairy manufacturers. The Gaofu feeding station fully considers the explosion‑proof requirements of milk powder production in its safety configuration. The equipment can be equipped with an explosion‑proof electrical control system to meet the requirements for use in dust explosive environments. The design of the pulse reverse‑cleaning dust collection system ensures that dust on the filter cartridge surface is removed promptly, preventing dust accumulation inside the equipment. The fully enclosed structure physically limits the spread of dust, reducing the probability of dust explosions.
From the perspective of actual production conditions in milk powder processing, the Gaofu milk powder feeding station delivers value in four dimensions:
Compliance value – With dust collection efficiency of 99.9% and dust concentration of ≤0.1 mg/m³, the equipment meets the requirements of GB 14881 food production hygiene standards, food GMP standards and dust explosion‑proof safety regulations. This helps enterprises present a more convincing compliance record during food safety audits, environmental inspections and occupational health assessments.
Quality value – The built‑in vibrating screen completes foreign matter interception at the feeding stage; the fully enclosed structure prevents external foreign matter and moisture from entering the feeding system; and food‑grade stainless steel eliminates metal contamination. The purity of the milk powder is systematically assured.
Efficiency value – A single machine achieves feeding efficiency of 500 to 2,000 bags per hour, 3 to 5 times faster than traditional manual feeding. The pulse reverse‑cleaning self‑cleaning mechanism ensures continuous high‑efficiency operation of the dust collection system without frequent stoppages for cleaning. The equipment can run 24 hours continuously, effectively supporting large‑scale production.
Cost value – Labour input is reduced by over 60%; material loss is controlled to ≤0.5%; food‑grade stainless steel extends equipment service life. For high‑value raw materials such as milk powder, reduced material loss and lower labour costs directly translate into economic benefits.
Food Industry Client Testimonials
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Fortune 500 Client Testimonials
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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.
