Over 10,000+ customers' choice, Focus on screening industry 40+ years
In the food processing industry, the screening of powder raw materials such as milk powder, starch, protein powder, sugar powder and rice flour is a core process for ensuring product quality. The fineness uniformity and purity of these food powders directly determine the taste, solubility and food safety of the final product.
However, when production scales up from laboratory small batches to industrial large batches, the demands on screening equipment change dramatically. Throughputs of several to several tens of tonnes per hour require screening equipment that not only "screens accurately" but also "screens quickly" and "screens reliably". Under high-capacity conditions, ordinary screening equipment often reveals shortcomings such as insufficient processing capacity, declining screening accuracy and frequent screen blinding, becoming a bottleneck in production line capacity.
The Gaofu SZF series food powder linear vibrating screen is a high-capacity model specifically designed for continuous classification and impurity removal in batch processing of food powders. With dual vibration motor linear drive for efficient screening, multi‑deck configuration for multi‑fraction classification in a single feed, and a fully enclosed food‑grade stainless steel structure for hygiene safety, it provides a large‑scale screening solution that balances capacity and accuracy for food powder processors.
The Gaofu SZF series food powder linear vibrating screen uses a dual vibration motor synchronous counter‑rotation drive principle. When the two vibration motors rotate synchronously in opposite directions, the excitation forces generated by their eccentric blocks cancel each other out in the direction parallel to the motor axes, while adding together in the perpendicular direction, driving the screen box in a high‑frequency linear reciprocating motion. The motor axes are set at an inclination angle relative to the screen surface. Under the combined action of the excitation force and the material's own gravity, the material is thrown up on the screen surface and moves forward in a parabolic jumping trajectory.
After material enters the screen surface evenly from the feed port, screening is completed during the linear motion – acceptable material smaller than the mesh openings passes through the screen quickly, while impurities and coarse particles larger than the openings are rapidly discharged along the screen surface. The equipment can be equipped with 1 to 5 screen decks simultaneously, completing classification of multiple particle sizes in a single pass.
This linear motion offers three core advantages for batch food powder screening:
First, high processing speed and capacity. The material moves forward in a jumping linear motion on the screen surface, with high travel speed and a large amount of material passing through the screen per unit time. The equipment covers models from SZF‑520 to SZF‑1540, with capacities ranging from 15 to 500 tonnes per hour. Whether it is a medium‑sized food plant processing several tens of tonnes per day or a large processing facility handling hundreds of tonnes per day, there is a capacity configuration to match.
Second, stable screening accuracy. The material forms a clear stratified flow on the screen surface, with large and small particles naturally separating. Screening accuracy can reach over 95% , effectively eliminating cross‑contamination between grades. For food powders, this means reliable batch‑to‑batch consistency of finished particle size.
Third, stable operation suitable for 24‑hour continuous operation. The dual‑motor synchronous drive ensures uniform vibration without deviation, and the equipment runs smoothly and reliably, capable of 24‑hour continuous stable operation. For the round‑the‑clock continuous production mode commonly found in the food processing industry, the structural design of the linear vibrating screen ensures that the equipment does not become the weak link in the production line.
Core Technical Advantages of the Gaofu Food Powder Linear Vibrating Screen
1. Wide Capacity Coverage – Matching Large‑Scale Production
The Gaofu SZF series linear vibrating screen covers an extremely wide capacity range – from a few hundred kilograms per hour to 500 tonnes per hour. For food powder processing, this means that a single linear vibrating screen on one production line can meet all screening requirements from raw material impurity removal to finished product classification, without the need for multiple units in parallel, reducing equipment investment and floor space.
The equipment can handle dry powders and granules of 0.074 to 5 mm with moisture content below 7% . The common fineness ranges of food powders – from coarse impurity removal (20‑40 mesh) to fine classification (200‑400 mesh) – can all be completed on the same machine simply by changing the screen mesh.
2. Multi‑Deck Classification – One Feed, Multiple Fractions
Food powder products often require more than one particle size grade – for example, flour has different fineness for extra‑fine, first‑grade and second‑grade products; starch screening also requires simultaneous production of multiple particle size fractions.
The Gaofu SZF series linear vibrating screen supports 1 to 5 screen decks, allowing a single feed to achieve precise classification of 2 to 6 different particle size fractions simultaneously. In a three‑deck configuration, for example: the top deck removes large impurities such as fibre and lumps, the middle deck collects the target‑size finished powder, and the bottom deck separates ultra‑fine powder. One machine replaces multiple single‑deck screens in series, greatly reducing equipment investment and process transfer time.
3. Food‑Grade Stainless Steel – Ensuring Food Safety
Food powders are used directly in food processing, so equipment materials must meet strict hygiene requirements. The Gaofu food powder linear vibrating screen is made entirely of 304 or 316 stainless steel, with a sturdy structure, corrosion resistance and durability, complying with food industry hygiene standards. The surfaces are finely polished, with rounded corners, no dead corners, and easy to clean – eliminating material residue and bacterial growth.
The screen uses a tensioned mounting structure that allows quick replacement without special tools. For food production lines that need to switch between different mesh sizes frequently, this design greatly reduces downtime.
4. Fully Enclosed Sealed Structure – Dust, Moisture and Contamination Protection
During food powder screening, dust escape causes both material loss and workshop contamination. The Gaofu food powder linear vibrating screen features a fully enclosed frame structure with a negative pressure dust extraction port. Screening takes place inside a sealed chamber, effectively suppressing dust escape.
The fully enclosed design provides three assurances: it prevents dust escape, improving the workshop environment; it effectively blocks external moisture, preventing secondary moisture absorption of the food powder during screening; and it prevents foreign matter from entering the screening system, ensuring the purity of the food powder.
5. Low Energy Consumption, Low Noise, Easy Maintenance
The vibration motors of the Gaofu SZF series linear vibrating screen are optimised for low operating noise, low energy consumption and long service life. The whole machine has a simple structure with few wearing parts, requiring minimal routine maintenance.
The screen uses a unique mounting structure that eliminates cross‑contamination between grades. When switching between different food powder varieties, cleaning and screen changes are simple and quick, effectively reducing production line downtime.
Typical Application Scenarios in Food Powder Screening
The Gaofu SZF series food powder linear vibrating screen is suitable for batch screening of the following food powders:
Milk powder screening. Infant formula, adult nutritional powder and other milk powders need to have lumps and fine foreign matter removed to ensure uniform particles and better solubility. The high‑capacity capability of the linear vibrating screen enables it to match the continuous feeding rhythm of milk powder production lines.
Starch screening. Corn starch, potato starch, tapioca starch and other starches – impurity removal, classification and filtration. Removes fibre, protein impurities, lumps and other foreign matter from starch, improving purity.
Flour classification. Precise separation of extra‑fine, first‑grade and second‑grade flour. The multi‑deck configuration of the linear vibrating screen completes multi‑grade flour classification in a single pass.
Sugar powder, protein powder and other food powder screening. Sugar powder, soy protein powder, whey protein powder and others need to have lumps, agglomerates and foreign matter removed. The high‑accuracy screening capability of the linear vibrating screen meets fine classification requirements of 200 mesh and above.
Food additives and seasoning powder screening. Impurity removal and classification of monosodium glutamate, chicken powder, seasoning powders and other materials.
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.
