Over 10,000+ customers' choice, Focus on screening industry 40+ years
Agarose microspheres are core chromatography media consumables in biopharmaceuticals and biotechnology R&D. Whether used in gel filtration chromatography, ion exchange chromatography or affinity chromatography, the particle size uniformity of the microspheres directly determines the separation and purification efficiency and batch‑to‑batch consistency.
However, agarose microsphere screening is a recognised industry challenge.
Agarose microspheres are spherical gel particles that are soft, have high water content and limited mechanical strength. During screening, the most troublesome issue is not "incomplete screening" but "breakage during screening". The high‑frequency impact and intense vibration of traditional vibrating screens cause surface cracks, edge damage or even complete fragmentation of the microspheres. Broken microspheres mixed into the finished product directly affect the packing uniformity of chromatography columns and separation efficiency. More seriously, microsphere fragments can block the column frits, leading to increased column pressure and reduced flow rate – potentially rendering the entire chromatography column unusable.
High screening accuracy is required, yet the material is fragile – this presents two contradictory demands for screening equipment: precise classification and gentle handling.
The Gaofu GFBD series tumbler screen for agarose microspheres is a specialised machine designed specifically to address this contradiction. It replaces high‑frequency vibration with manual‑emulating low‑frequency gyratory motion, and replaces rigid impact with flexible three‑dimensional motion – effectively reducing the probability of microsphere breakage while maintaining screening accuracy.
The screening logic of traditional vibrating screens is "vibration" – high‑frequency mechanical vibration causes the material to jump rapidly on the screen surface and pass through the mesh. The advantage of this method is high processing speed, but for fragile materials such as agarose microspheres, the risk of damage from high‑frequency impact is ever‑present.
The design logic of the Gaofu tumbler screen is fundamentally different – emulating manual screening, replacing "vibration" with "tumbling" .
The equipment uses an adjustable‑eccentricity exciter to generate non‑linear three‑dimensional motion, causing the material to follow a spiral trajectory on the screen surface that closely mimics manual operation. Material enters from the centre of the screen and spreads evenly toward the edges along a spiral curve, achieving stratification and passage through the screen through gentle rolling motion.
The essential difference in motion is:
Traditional vibrating screen – material "jumps" on the screen surface, with high‑frequency impact acting directly on the microsphere surface
Gaofu tumbler screen – material "rolls" on the screen surface, with microspheres naturally stratifying through gentle motion
Gentle acceleration combined with low‑speed operation ensures that the material is always rolling on the screen surface. The horizontal and vertical acceleration gradually increase as the particles move, allowing particles close to the mesh size to pass through successfully, while larger particles are conveyed to the outlet.
The advantage of the Gaofu tumbler screen in reducing agarose microsphere breakage comes from the synergy of four mechanisms.
Mechanism 1: Low‑frequency operation – significantly reduced impact energy.
The drive speed of the Gaofu tumbler screen is adjustable between 120 and 360 rpm , far lower than the vibration frequency of traditional vibrating screens. The acceleration is only a fraction of that of ordinary vibrating screens, and the impact energy on the material is significantly reduced. For brittle gel particles such as agarose microspheres, low frequency means lower breakage risk.
Mechanism 2: Non‑linear three‑dimensional motion – material "rolls" rather than "impacts".
The instantaneous motion of the tumbler screen is a combination of radial displacement and circular motion around this displacement – a spiral motion. The material spreads outward in a spiral pattern on the screen surface, always in a rolling state rather than a jumping state. This motion closely resembles manual screening, with gentle and controllable mechanical action on the microspheres.
Mechanism 3: Rubber springs transmit the tumbling force – gentle and controlled.
The equipment uses rubber springs to transmit the tumbling force, avoiding rigid impact between metal components. The transmission path of the tumbling force is cushioned, making the force acting on the microspheres more gentle. For materials where particle integrity needs to be preserved, this flexible transmission is essential.
Mechanism 4: Adjustable eccentricity and speed – adaptable to different microsphere characteristics.
Users can adjust the eccentricity between 25 and 40 mm and the drive speed between 120 and 360 rpm according to material characteristics. For agarose microspheres of different particle sizes and degrees of crosslinking, the optimal screening conditions can be found through parameter adjustment – maintaining screening accuracy while keeping the breakage rate at its lowest possible level.
Advantage 1: High Screening Accuracy – Meeting Chromatography Media Particle Size Requirements
The particle size of agarose microspheres typically ranges from 45 to 165 microns , with an average particle size of approximately 90 microns. The Gaofu tumbler screen can achieve screening fineness up to 500 mesh or 0.028 mm , fully covering the particle size classification requirements for agarose microspheres. The equipment supports 1 to 5 screen decks , allowing a single feed to complete multi‑stage particle size classification – from coarse impurity removal to fine classification, all on the same machine.
Advantage 2: High Microsphere Integrity – No Surface Damage, No Edge Chipping
The Gaofu tumbler screen has been specifically optimised for screening micro‑pellet materials. Screen meshes are custom‑designed according to material characteristics, ensuring that microspheres are not damaged, chipped, stuck or blocked. The equipment has demonstrated its ability to preserve material integrity in pharmaceutical micro‑pellet screening applications – a single unit can achieve a throughput of up to 350 kg per hour while effectively avoiding pellet damage. For high‑value chromatography media such as agarose microspheres, improved microsphere integrity directly translates into higher product yield and increased economic value.
Advantage 3: Fully Enclosed Dust‑Proof Design – Compliant with GMP Standards
The Gaofu tumbler screen features a fully enclosed design, requiring no auxiliary air purification or dust collection devices – the system can be self‑contained with airtight and vacuum design. Screening takes place inside a sealed chamber – no powder escape, no material leakage. For agarose microsphere production in biopharmaceuticals and life sciences, the fully enclosed design effectively prevents cross‑contamination and foreign matter entry, complying with GMP production standards.
Advantage 4: Low Noise, Low Energy Consumption – Smooth Operation
The equipment consistently maintains noise levels between 60 and 70 decibels , far lower than the operating noise of traditional vibrating screens. Low‑energy design keeps long‑term operating costs under control. The simple modular design and low‑speed operation make maintenance easy and ensure a low failure rate.
Advantage 5: Automatic Discharge of Impurities – Supporting Continuous Operation
During screening, impurities and oversize material automatically move along the screen surface to the reject port and are discharged. The equipment supports 24‑hour continuous operation without frequent stoppages for cleaning. For agarose microsphere manufacturers requiring large‑scale production, this means stable capacity output and efficient line operation.
The Gaofu GFBD series tumbler screen for agarose microspheres is suitable for the following screening applications:
Finished agarose microsphere classification. Precisely classifying prepared agarose microspheres by particle size to ensure that different specifications meet the requirements of different chromatography applications. One feed completes multi‑stage classification, improving production efficiency.
Microsphere raw material impurity removal. Removing gel fragments, large particle agglomerates and fine impurities that may be introduced during microsphere preparation, ensuring the purity of the chromatography media.
Crosslinked microsphere screening. Crosslinked agarose microspheres have improved mechanical strength but are still fragile materials. The low‑frequency flexible screening of the tumbler screen effectively protects the integrity of crosslinked microspheres while maintaining screening accuracy.
Regenerated microsphere processing. During the regeneration of used chromatography media, some microspheres may break or agglomerate. The tumbler screen can classify regenerated microspheres, removing broken fragments and recovering intact microspheres.
From the perspective of actual production conditions in agarose microsphere processing, the Gaofu GFBD series tumbler screen delivers value in three dimensions:
Quality value – improved microsphere integrity. Low‑frequency flexible screening effectively reduces the probability of microsphere breakage, and finished microspheres have smooth surfaces and intact edges. Chromatography columns pack uniformly, separation efficiency is stable, and batch‑to‑batch consistency is reliably assured.
Efficiency value – continuous operation, full capacity utilisation. The equipment can run 24 hours continuously, with impurities automatically discharged without manual intervention. One machine completes multi‑stage classification, replacing multiple traditional screens in series, and the overall capacity of the production line is fully utilised.
Compliance value – GMP compliance. The fully enclosed dust‑proof design effectively prevents cross‑contamination and foreign matter entry; stainless steel construction with no hygiene dead corners is easy to clean. This helps biopharmaceutical enterprises present a more convincing compliance record during GMP audits and customer factory inspections.
Pharmaceutical Industry Client Testimonials
Dong-E E-Jiao, Harbin Pharmaceutical Group, North China Pharmaceutical,Yangtze River Pharmaceutical Group, Taiji Group, Huadong Medicine,CSPC Group, Northeast Pharmaceutical, Guangzhou Baiyunshan, Tongrentang,Huiren Pharmaceutical, Fosun Pharma, Xiuzheng Pharmaceutical, Lijun Pharmaceutical,Luye Pharma Group, Di'ao Group, TianGongLi, Hengrui Medicine, Jiuzhitang, Jiangzhong Pharmaceutical, Lunan Pharmaceutical, Yunnan Baiyao, Sunflower Pharmaceutical,China Sanjiu Enterprise Group, Sanjin Pharmaceutical, Yiling Pharmaceutical,Wantong Pharmaceutical, Pientzehuang, Ma Yinglong Pharmaceutical, Guangyuyuan,Aodong Pharmaceutical, Besunyen, Jingfukang Pharmaceutical, Furen Pharmaceutical Group,Guizhou Bailing, Conba, Huasu Pharmaceutical, Yifang Pharmaceutical
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.
