Over 10,000+ customers' choice, Focus on screening industry 40+ years
The dust‑proof design of the rotary vibrating sieve is not just a "cover" – it is a complete sealing system.
Sealing rings + clamp ring locking – Special sealing strips are used between screen frames, together with clamp ring locking, creating a completely sealed screening chamber. During operation, the material is classified and de‑dedusted inside the sealed chamber, with no powder escape.
Dust cover + sealing strip – A dust cover and sealing strip are fitted at the top of the equipment to further suppress dust escape. For production lines that need to connect to a workshop dust extraction system, an optional dust extraction port can be added for dual protection.
360° adjustable discharge ports – Sealing does not sacrifice flexibility. The discharge ports can be rotated 360° around the axis, making it easy to connect with upstream and downstream equipment and adapt to different workshop layouts.
The direct results of this sealing system are: workshop dust concentration is controlled, material loss is controlled, and cross‑contamination risk is controlled.
What do these three points mean for plant extract processors?
Controlled workshop dust concentration – Many plant powders contain active ingredients, and the health impact of long‑term inhalation by operators cannot be ignored. The fully enclosed structure reduces dust exposure at the source.
Controlled material loss – Plant extracts are costly. Every gram of powder that drifts away represents a direct loss. Enclosed screening ensures material "goes in and comes out" rather than "half in, half lost."
Controlled cross‑contamination risk – Cross‑contamination between different plant extracts is a red line in food, health food and pharmaceutical industries. The fully enclosed structure makes batch changes cleaner.
Enclosed dust‑proofing solves the dust escape problem, but plant powders have two more tricky issues: screen blinding and caking.
Plant fibres tend to wrap around mesh openings during screening. Ultra‑fine powder accumulates static electricity during high‑speed motion and adheres to the screen surface, forming a "powder film." Hygroscopic powder increases adhesion, further aggravating screen blinding.
The Gaofu S49 series rotary vibrating sieve addresses these with three‑dimensional vibration + multiple cleaning systems.
Three‑dimensional vibration – A vertical vibration motor drives the equipment, with eccentric weights at both ends generating compound vibration in horizontal, vertical and tilting directions. The material moves in a spiral diffusion pattern on the screen surface, continuously tumbling and dispersing. Fibres do not concentrate and wrap, and powder does not accumulate locally.
Bouncing ball cleaning – Food‑grade silicone balls are placed under the screen deck. During screening, they continuously tap the screen cloth, dislodging adhering material and keeping the mesh clear.
Ultrasonic cleaning (optional) – For severe electrostatic adhesion or ultra‑fine powder (above 200 mesh), the high‑frequency micro‑vibration generated by the ultrasonic transducer is superimposed on the screen surface, effectively breaking the adhesion between the material and the screen. Screening accuracy can be improved by over 70%, and throughput is 2‑10 times that of ordinary screens.
These three mechanisms work together to keep the equipment running continuously with high passage rate and high screening accuracy.
The screening requirements for plant extract powders span a wide range.
Routine impurity removal: 80‑120 mesh, removing fibres, lumps and foreign matter;
Fine classification: 200‑300 mesh, obtaining target‑size finished powder;
Ultra‑fine powder screening: 400‑500 mesh, meeting the fineness requirements of premium health foods and pharmaceuticals.
The Gaofu S49 series rotary vibrating sieve supports 1 to 5 screen decks, with screening accuracy up to 600 mesh (0.02 mm) and filtration precision down to 5 microns. One machine, one feed, completes multi‑stage classification simultaneously – coarse screening removes impurities, fine screening classifies, and ultra‑fine powder is separated – each to its proper outlet.
Screen changes take only 3‑5 minutes. When switching between different products, there is no long downtime. The mother‑child screen frame structure means the mother screen provides support while the fine screen (working screen) performs the screening. When the fine screen wears out, only that needs replacing; the mother screen remains in service, reducing consumable costs.
Plant extract powders are used directly in food, health foods and pharmaceuticals, so equipment materials must meet strict standards.
All material‑contact parts of the Gaofu S49 series rotary vibrating sieve are made of 304 food‑grade stainless steel, with finely polished surfaces, no hygiene dead corners, and easy to clean. For production lines requiring even higher cleanliness, 316L stainless steel is available.
The combination of fully enclosed structure, food‑grade stainless steel and dead‑corner‑free design makes the equipment compliant with food GMP standards and pharmaceutical industry cleanliness requirements.
In GMP audits and factory inspections, inadequate equipment cleaning and poor dust control are common points for deduction. The enclosed dust‑proof structure and easy‑to‑clean design of the Gaofu rotary vibrating sieve help enterprises reduce compliance risks at the equipment level.
Plant extract powder screening is never as simple as "just passing powder through a screen."
The material is light – it needs enclosed dust‑proofing. The material is fine – it needs high‑precision screening. The material is hygroscopic – it needs anti‑blinding and cleaning. The material comes into direct contact with food or pharmaceuticals – it needs food‑grade materials.
The design logic of the Gaofu S49 series rotary vibrating sieve for plant powder revolves around these four requirements: fully enclosed structure for dust control, three‑dimensional vibration for accuracy, multiple cleaning systems for anti‑blinding, and food‑grade stainless steel for purity.
When plant powder is classified inside a sealed chamber, when dust is locked in the equipment instead of spreading through the workshop, and when every batch undergoes precise screening – the quality of plant extracts is assured from the very first step.
About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was originally founded in the 1980s. After more than 40 years of development, the company has become a "National Specialized and Sophisticated 'Little Giant' Enterprise", a "National Green Factory", a "National High-tech Enterprise", a "National Intellectual Property Advantage Enterprise", and the "President Unit of the Vibration Association". It also hosts the "Henan Provincial Industrial Design Center", the "Henan Provincial Engineering Technology Research Center for Intelligent Online Screening Systems", and the "Xinxiang Municipal Engineering Technology Research Center for Fine Screening". The company has been granted more than 500 invention, utility model and design patents, has received the "Science and Technology Achievement Award" issued by the Ministry of Industry and Information Technology, and has participated in drafting four "National Standards".
Gaofu's product portfolio covers several series and hundreds of varieties, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment, and automated material handling systems. Its main products include vibrating screens, screening machines, vibrating sifters, rotary vibrating screens, ultrasonic vibrating screens, linear screens, air flow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeders, dust-free feeding stations, ton bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag discharge filters, leaf filters, clay filters, toothed roll crushers, coal crushers, and other equipment. These are widely used in many industries such as food, pharmaceuticals, chemicals, metallurgy, building materials, mining, thermal power, and environmental protection, earning the trust and praise of over 10,000 customers worldwide.
Gaofu products are not only popular in Greater China but are also exported to more than 100 countries and regions, including Russia, Canada, the United States, New Zealand, Japan, Brazil, South Africa, etc. The company adheres to its mission: "Enhance material quality and efficiency, meet customer needs", walking side by side with customers for harmonious and win-win cooperation. Today, Gaofu has become an approved supplier to many Fortune 500 companies, including CNPC, Sinopec, Sinochem Group, China Resources Group, Sinopharm Group, COFCO Group, China National Building Material Group, China Aerospace, and Jinchuan Group.
Gaofu Machinery – Global No.1 in Vibrating Screen Sales. In May 2024, Frost & Sullivan, an international authoritative advisory firm, based on its research on the global vibrating screen market and calculated according to global vibrating screen sales volume in 2023, issued a market position confirmation certificate to Gaofu Machinery.
