Over 10,000+ customers' choice, Focus on screening industry 40+ years
Amino acid powders – lysine, glutamic acid, methionine, tryptophan – are core raw materials in food additives, health foods, biopharmaceuticals and feed additives. The purity and particle size uniformity of these powders directly determine the quality and safety of the final products.
Unlike ordinary powder materials, amino acid powder screening faces three overlapping challenges: fine particle size, easy moisture absorption, and strong electrostatic adhesion. Fine powder blinds the screen, static electricity causes powder to agglomerate, and moisture leads to caking – when ordinary screening equipment handles amino acid powder, it often falls into the repetitive cycle of "blinding – stoppage – cleaning – blinding again."
However, even more troublesome than screen blinding is the issue of cleanliness. Amino acid powders are high‑value materials, and the entire production process must comply with the strict requirements of the "National Food Safety Standard – General Hygienic Practice for Food Additive Production" (GB 31647). Equipment that contacts the material must be easy to clean and sanitise, with a structure that avoids hygiene dead corners. For amino acid producers, screening equipment must not only "screen precisely" but also "clean thoroughly and sanitise completely."
The Gaofu S49 series GMP‑compliant amino acid powder rotary vibrating sieve is designed specifically for this requirement. With a smooth internal cavity for dead‑corner‑free cleaning and sanitisation, a fully enclosed structure for clean production, and a modular quick‑release design to meet GMP cleaning validation requirements, it provides a comprehensive solution.
In GMP clean workshops, the surface condition of equipment internal walls directly determines the effectiveness of cleaning and sanitisation.
All material‑contact parts of the Gaofu amino acid powder rotary vibrating sieve are made of food‑grade 304 stainless steel , with 316L stainless steel available for higher‑grade applications. The surfaces are mirror‑polished (Ra ≤ 0.4μm), with no welds and no dead corners.
The three levels of value that a smooth internal cavity brings to cleaning and sanitisation:
First, no material residue. The smooth, dense mirror‑polished surface gives amino acid powder no place to adhere. Fine powder slides off smoothly under gravity, without forming accumulation layers on the internal walls. During batch changes, residual material is greatly reduced, and cleaning efficiency is significantly improved.
Second, no dead corners for sanitisation. The mirror‑polished surfaces, combined with a dead‑corner‑free structural design, ensure that cleaning and sanitisation operations can cover every area of the internal walls. Whether using high‑pressure water jets, chemical disinfectant wipes, or steam sterilisation, thorough sanitisation is guaranteed – with no "unseen corners."
Third, cleaning results can be verified. The smooth internal surfaces make visual inspection after cleaning more reliable. With nowhere for residue to hide, sampling and testing for cleaning validation produce more convincing results. For enterprises that need to pass GMP audits and customer factory inspections, this design provides a fundamental basis for cleaning validation at the equipment level.
"Smooth internal cavity" and "easy cleaning and sanitisation" are two sides of the same coin – smooth surfaces allow sanitising agents to cover evenly, and thorough sanitisation in turn ensures the purity of the next batch. For high‑value, high‑hygiene materials such as amino acids, this design is not an optional extra – it is a necessary condition for compliant production.
Amino acid powder is light and easily becomes airborne. If the equipment is not well sealed during screening, fine powder will escape into the workshop air – causing costly material loss and contaminating the clean workshop environment.
The Gaofu amino acid powder rotary vibrating sieve features a fully enclosed sealed structure with food‑grade silicone or fluororubber seals.
Four layers of protection that the fully enclosed structure provides for clean production:
Leak prevention – Screening takes place inside a sealed chamber, with amino acid powder completely contained within the equipment – no dust escape. The workshop environment remains clean, meeting the air cleanliness requirements of GMP workshops.
Contamination prevention – Dust, microorganisms and moisture from the outside air cannot enter the screening chamber, physically blocking external contamination sources.
Cross‑contamination prevention – When switching between different amino acid products or batches, the fully enclosed structure, combined with the quick‑release design, enables thorough cleaning and effectively isolates residual material.
Loss reduction – Amino acid powders are high‑value materials. The fully enclosed structure greatly reduces raw material loss from dust dispersion. For amino acid products valued at tens of thousands of yuan or more per tonne, reduced material loss directly translates into improved production efficiency.
GMP standards have clear requirements for equipment cleaning validation – cleaning procedures must be validated to demonstrate that equipment cleaned according to the prescribed method consistently achieves the predetermined cleaning standards.
The Gaofu amino acid powder rotary vibrating sieve features a modular quick‑release structural design. Screen meshes, screen frames, seals and other components can be quickly disassembled and reassembled without special tools. The whole machine supports sterile quick‑release construction, meeting the cleaning standards of pharmaceutical GMP workshops.
The three levels of value that the quick‑release structure brings to cleaning and sanitisation:
Reduced cleaning time. The mother‑child screen structure allows screen changes in just 3 to 5 minutes. When switching between different amino acid products, the equipment can be disassembled, cleaned and reassembled in a short time, greatly reducing downtime.
More thorough cleaning. Removable components can be cleaned individually, ensuring that every corner is reached. The mirror‑polished internal walls, combined with the detachable design, allow cleaning operations to cover all internal and external surfaces of the equipment.
Clean‑in‑place verification. The quick‑release structure makes visual inspection and sampling after cleaning more convenient. Cleaning validation, maintenance records and other operations can be integrated into the enterprise‘s quality management system, providing equipment‑level support for GMP audits and customer factory inspections.
The GMP compliance design of the Gaofu amino acid powder rotary vibrating sieve is not a stack of individual features – it is systematic assurance from the internal cavity to the cleaning workflow.
Material compliance. Material‑contact parts are made of SUS304 stainless steel as standard, with 316L mirror‑polished stainless steel available for higher‑grade applications. Material selection complies with the GB 4806 series safety standards for food contact materials and products.
Structural compliance. The whole machine features a dead‑corner‑free design, with mirror‑polished internal walls (Ra ≤ 0.4μm) and no hygiene dead corners. The equipment structure allows rapid disassembly, cleaning and reassembly, meeting the auxiliary requirements of GMP and other standards for equipment cleaning validation.
Sealing compliance. The fully enclosed silicone/fluororubber sealing structure ensures no dust escape. The seal materials are food‑grade, corrosion‑resistant and aging‑resistant, maintaining sealing performance during long‑term use.
Workflow compliance. The quick‑release structure makes cleaning validation operable and traceable. Cleaning effectiveness can be verified through visual inspection, sampling and testing, ensuring thorough cleaning before every product changeover.
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.
