Over 10,000+ customers' choice, Focus on screening industry 40+ years
Amino acids are core raw materials in high‑value sectors such as food additives, health foods, biopharmaceuticals and feed additives. Products like L‑lysine, glutamic acid, methionine and tryptophan have their purity and particle size uniformity directly determining the quality of the final product. However, screening amino acid powders presents multiple challenges.
Amino acid powders are characterised by fine particle size, easy moisture absorption and strong electrostatic adhesion. During screening, fine powder easily blinds the screen, static electricity causes powder to agglomerate, and ordinary screening equipment struggles to maintain continuous stable operation. More importantly, as high‑value materials, the entire production process of amino acids demands extremely strict cleanliness and hygiene standards. If the internal surfaces of the equipment have hygiene dead corners, residual material will breed bacteria and contaminate subsequent batches, directly threatening food safety and product quality.
According to the "National Food Safety Standard – General Hygienic Practice for Food Additive Production" (GB 31647), food additive manufacturers must establish control systems to prevent biological, chemical and physical contamination. The design and material selection of equipment are fundamental to meeting this standard. 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 rotary vibrating sieve is a professional machine designed specifically for the above requirements. With mirror‑polished internal surfaces for dead‑corner‑free cleaning, a fully enclosed structure for clean production, and a modular quick‑release design to meet GMP cleaning validation requirements, it provides a screening solution that complies with the hygiene standards for food additives and pharmaceutical intermediates.
The cleanliness of amino acid screening equipment begins with the surface treatment of its internal walls. All material‑contact parts of the Gaofu S49 series amino acid rotary vibrating sieve are made of food‑grade 304 stainless steel , with 316L stainless steel available for high‑end applications. The surfaces are mirror‑polished to a very low roughness, with no welded dead corners.
Three assurances provided by mirror‑polished internal surfaces:
First, no material residue. The smooth, dense internal surfaces give 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, corrosion resistance and no peeling. 304/316L stainless steel offers good resistance to weak acids and alkalis that may be present in amino acid processing environments. The mirror‑polished surface is integral with the base material, with no risk of coating peeling, and remains smooth even after long‑term use.
"Smooth internal surfaces" and "easy 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 provides a fundamental assurance of food safety at the equipment level.
Fully Enclosed Structure: Safeguarding Clean 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 rotary vibrating sieve features a fully enclosed sealed structure with food‑grade silicone seals.
Three layers of protection provided by the fully enclosed design:
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. For production workshops that need to maintain cleanroom grades, the fully enclosed structure is a fundamental defence for product purity.
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.
The fully enclosed structure also reduces the loss of costly amino acid raw materials. For amino acid products valued at tens of thousands of yuan or more per tonne, reduced material loss directly translates into improved production efficiency.
The production of food additives and pharmaceutical intermediates has clear GMP compliance requirements for equipment. The Gaofu amino acid rotary vibrating sieve incorporates systematic configuration in the following areas:
Material compliance. Material‑contact parts are made of SUS304 stainless steel as standard, with 316L mirror‑polished stainless steel available for high‑end applications – no risk of heavy metal leaching. 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 both internal and external surfaces easy to clean. 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 sealing structure ensures no dust escape. The seal materials are food‑grade, corrosion‑resistant and aging‑resistant, maintaining sealing performance during long‑term use.
Quick‑release design. The mother‑child screen structure allows screen changes in just 3 to 5 minutes. The whole machine supports sterile quick‑release construction, meeting the cleaning standards of pharmaceutical GMP workshops. When switching between different amino acid products, the equipment can be disassembled, cleaned and reassembled in a short time, greatly reducing downtime.
Traceability design. The equipment design and manufacturing process strictly follow relevant industry standards. 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.
Core Technology: Solving the Screen Blinding Problem in Amino Acid Screening
The main causes of screen blinding in amino acid screening are electrostatic adhesion and moisture‑induced caking. The Gaofu amino acid rotary vibrating sieve offers two solutions for this pain point:
Standard rotary vibrating sieve. Suitable for conventional dry amino acid powders (≥100 mesh). Equipped with a bouncing ball cleaning system, the balls continuously tap the underside of the screen during screening, dislodging adhering powder and keeping the mesh clear.
Ultrasonic rotary vibrating sieve (S49‑AC series). Specifically designed for ultra‑fine (≤200 mesh), highly electrostatic amino acid powders. The equipment adds an ultrasonic generating system to the conventional rotary vibrating sieve, using high‑frequency (18‑40 KHz) low‑amplitude mechanical energy to effectively break down electrostatic adhesion and agglomeration between ultra‑fine particles. Screen permeability can reach over 96%.
The equipment supports 1 to 5 screen decks , allowing a single feed to complete multi‑stage particle size classification simultaneously. Screening fineness covers 2 to 600 mesh , with capacity ranging from 50 kg/h to 1,200 kg/h. Whether it is conventional 80‑mesh screening or fine 500‑mesh classification, it can be completed with precision.
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.
