Over 10,000+ customers' choice, Focus on screening industry 40+ years
The screening and purification of coffee powder present several unique challenges in actual production:
High fineness requirements and clear grading needs. The fineness of coffee powder directly affects extraction efficiency and flavour performance – espresso requires very fine powder, pour‑over uses medium‑fine, and cold brew favours coarser grinds. Different applications require different particle size distributions, so the equipment must have multi‑stage grading capability to separate material into different size fractions.
Oil content causes adhesion and screen blinding. Coffee beans contain natural oils, which are released during roasting. These oils cause the ground coffee to adhere to the screen surface, blocking the mesh and significantly reducing screening efficiency, requiring frequent stoppages for cleaning.
Dust emission affects workshop environment and causes material loss. Coffee powder contains a high proportion of fines. In traditional open screening operations, dust is easily generated, affecting the workshop environment and causing material waste.
Impurities compromise purity. During processing, coffee powder may pick up lumps, foreign matter, and other impurities that directly affect the final product's taste and safety.
Gaofu's rotary vibrating sieve uses a vertical vibration motor as the excitation source. Eccentric weights are installed at the top and bottom of the motor, converting rotary motion into a three‑dimensional compound motion (horizontal, vertical, and inclined) that is transmitted to the screen surface. By adjusting the phase angle of the upper and lower eccentric weights, the material's movement trajectory and residence time on the screen can be flexibly changed to suit different coffee powder fineness requirements.
Material enters through the central feed port and, under the three‑dimensional tumbling force, spreads outward on the screen surface in a spiral path. Fines smaller than the screen openings pass through to the lower hopper, while oversize particles and impurities travel along the screen surface and are discharged from the reject outlet – achieving both impurity removal and finished‑product grading in one step.
The Core Value of Multi‑Layer Grading Design
The "multi‑layer grading" feature of Gaofu's coffee powder rotary vibrating sieve is the key differentiator from ordinary single‑deck screening equipment:
1. One feed, multiple grades
The equipment supports flexible configurations of 1 to 5 screen decks, allowing a single machine to perform 2 to 6 grades of separation or filtration simultaneously. For coffee powder processing, the upper deck intercepts lumps and coarse impurities, the middle decks achieve different fineness grades (e.g., fine, medium, coarse), and the lower deck acts as a safety screen to ensure final purity. This "multi‑function in one machine" design reduces material transfer between multiple units, shortening overall processing time.
2. High screening accuracy ensures fineness compliance
The rotary vibrating sieve achieves screening accuracy up to 600 mesh (0.02 mm) and filtration precision down to 5 microns. For typical coffee powder screening requirements, this accuracy capability provides ample margin, ensuring stable and consistent finished product fineness.
3. Automatic impurity discharge supports continuous operation
During screening, impurities and oversize material are automatically discharged without manual intervention. This allows the equipment to run continuously for extended periods, reducing capacity losses caused by stoppages for cleaning.
4. Separate mother‑screen / fine‑screen design extends screen life
Gaofu's rotary vibrating sieve features a unique separate mother‑screen and fine‑screen design, where the mother screen fully supports the working fine screen. This effectively distributes the impact force of the material, extending the service life of the fine screen. Screen changes take only 3‑5 minutes, significantly reducing maintenance downtime.
With over 40 years of experience in screening equipment, Gaofu Machinery has developed its S49 series as high‑precision equipment for fine screening of powders and granular materials. For coffee powder screening and purification, this series offers the following technical features:
High screening accuracy. Achieves up to 600 mesh (0.02 mm) and filtration precision down to 5 microns, with screening efficiency reaching 99.56%. It effectively removes lumps and foreign matter from coffee powder, ensuring product purity.
Multiple models for different capacities. Effective screening diameters range from Φ560 mm to Φ1920 mm, with processing capacities covering 100 kg/h to 3,300 kg/h – suitable for coffee processing plants of various scales.
Food‑grade stainless steel construction. All parts that contact coffee powder are made of 304 stainless steel (316L available on request), with finely polished surfaces and no dead corners, meeting food industry hygiene standards.
Fully enclosed structure improves the workshop environment. The equipment features a fully enclosed design that prevents dust from escaping during operation. For fine materials like coffee powder, this design not only improves the workshop environment but also reduces material loss.
Multiple screen‑cleaning options. To address the oily, adhesive nature of coffee powder, the tumbler screen can be equipped with bouncing‑ball cleaning systems or ultrasonic cleaning systems. The ultrasonic system superimposes high‑frequency vibrations on the screen, keeping material suspended on the screen surface and effectively reducing adhesion and blinding.
Low noise and long service life. The equipment operates with low noise and has a normal service life of 15‑20 years.
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.
