The air screen cleaner integrates two core technologies—pneumatic separation and multi-layer vibrating screening—into a single unit. During operation, a fan generates a uniform longitudinal airflow to separate lightweight impurities (such as stalks, soybean hulls, and empty husks) from heavier soybean or grain kernels based on density differences. Simultaneously, a vibrating motor drives multi-layer screens with varying aperture sizes to perform size-based grading and impurity removal; large impurities are retained on the upper screen, while fine impurities pass through the lower screen, enabling simultaneous air separation and screening. The process achieves a product purity of up to 99.5%.
Air screen cleaner are widely used for the preliminary cleaning of various grains, oilseeds, and specialty crops—such as soybeans, corn, wheat, sorghum, sesame, kidney beans, chickpeas, and coffee beans. They are suitable for a range of applications, including grain procurement stations, grain and oil processing plants, specialty crop sorting lines, seed processing enterprises, and the pre-treatment of raw materials for agricultural product import and export.
With over 20 years of manufacturing experience, Hebei Taobo Machinery Equipment Co., Ltd. produces proprietary air-screen cleaning machines that stand out for their mature, stable separation technology, robust build quality, and adaptability to diverse operational scenarios. These products are exported to more than 100 countries—spanning major grain and oil-producing regions in Africa, Southeast Asia, Central Asia, Europe, the Americas, and beyond—demonstrating the company's extensive market reach and substantial comprehensive strength. The company operates a standardized 10,000-square-meter production facility and holds 20 patented technologies; its equipment is CE-certified and engineered to handle the specific impurity profiles of soybeans and coarse grains found worldwide. The machinery meets the needs of everything from small-scale grain collection stations requiring simple cleaning to large-scale, integrated processing and export lines. Consistently exported in volume to facilities in countries such as Nigeria, Pakistan, the USA, Spain, and Tanzania, Taobo’s equipment has earned acclaim from global clients for its 99.5% impurity removal rate, low-loss operation, and comprehensive after-sales support. This vast export footprint serves as both a testament to the products' superior quality and a reflection of Taobo Machinery's formidable capabilities in the global grain cleaning equipment sector—encompassing R&D, manufacturing, and supply.
The air screen cleaner integrates pneumatic separation and vibrating screen classification to simultaneously remove impurities. On one hand, a centrifugal fan generates a stable vertical airflow, enabling separation based on material specific gravity and terminal velocity; heavy, plump soybean seeds with high terminal velocities remain unaffected by the airflow, whereas lightweight impurities—such as hulls, dust, shriveled beans, and straw fragments—are entrained by the air and conveyed to a dust collection system, ensuring the one-pass removal of light impurities. On the other hand, a vibrating motor drives a multi-layer screen assembly to undergo high-frequency reciprocating motion, classifying particles by size through screens with varying apertures; large soil clods and long straw stalks exceeding the size of standard soybeans are retained by the top screen and discharged, while fine sand, soil, broken cotyledons, and small weed seeds smaller than the soybeans pass through the bottom screen. Standard-sized soybeans remain on the middle screen layer and are continuously conveyed forward. Through the synergistic action of these pneumatic and mechanical screening methods, impurities of varying weights and sizes are removed simultaneously in a single pass, achieving efficient preliminary cleaning of the grain raw material.
Raw material is evenly fed into the air-screen cleaner via the feeding mechanism, entering first the primary air-separation zone; a fan generates a steady upward airflow through the material layer, carrying away light impurities—such as bean hulls, dust, shriveled grains, broken stalks, and grass fragments—through an air duct to a centralized dust and debris collection point. After the removal of light impurities, the soybeans descend onto a multi-layer vibrating screen assembly driven by a vibrating motor; the top screen (with large apertures) retains large impurities like soil clods, coarse stalks, and debris, discharging them through a large-impurity outlet; the middle screen retains the qualified soybean grains; and the bottom screen (with fine apertures) allows fine impurities—such as sand, soil, broken cotyledons, and tiny weed seeds—to pass through for discharge via a fine-impurity outlet. Sorting parameters can be adjusted in real-time throughout the process by modifying the airflow rate, screen inclination angle, and feed rate; finally, clean, intact soybeans flow continuously from the central clean-grain outlet, completing the integrated, continuous air-separation and screening process.
Nov. 07, 2026
2026 gravity separator utilizes differences in material specific gravity to perform sorting. It is specifically designed to remove impurities and inferior-quality grains that are similar in size to the target seeds—particles that are otherwise difficult to separate using conventional air-screen or vibrating-screen cleaners. It serves as a core piece of precision-sorting equipment in processing lines for grains, sesame seeds, and legumes.
Nov. 05, 2026
Sesame seeds are extremely small (approximately 1.5–2 mm in diameter) and flat-oval in shape, with a smooth surface, high oil content, and relatively low specific gravity. These physical characteristics present unique challenges for cleaning: while light impurities—such as stalks, husks, dust, and shriveled or empty seeds—can be removed via air classification (aspiration), and oversized or undersized debris can be intercepted through screening, certain contaminants pose a greater difficulty. Specifically, stones, sand, clods of soil, and metal fragments—which are similar in size to sesame seeds but have a significantly higher specific gravity—cannot be effectively separated by either air classification (as they are too heavy to be moved by airflow) or screening (as they pass through or are retained alongside the seeds).
Nov. 05, 2026
Professional Grain Cleaning Gravity Paddy Separator Suppliers
Nov. 04, 2026
Pakistan is a significant global producer and exporter of sesame seeds, ranking as one of the few oilseed crops for which the country maintains a net export position. According to data from Pakistan’s Ministry of National Food Security and Research, the area under sesame cultivation expanded substantially from approximately 259,900 hectares in the 2022/23 crop year to about 399,800 hectares in 2023/24—an increase of 53%. Production reached approximately 301,200 tonnes, a sharp year-on-year rise of 97.7%. For the 2024/25 crop year, production is projected to climb further to approximately 440,000 tonnes (a 44.7% year-on-year increase), with the harvested area—as recorded by FAOSTAT—exceeding 700,000 hectares. The primary production regions are concentrated in Punjab province (cultivated during the *Kharif* monsoon season, covering approximately 1.76 million acres in 2024) and parts of Sindh province. In recent years, technical cooperation between Pakistan and China, alongside the adoption of contract farming, has led to significant improvements in both crop yields and the level of commercialization.
Nov. 02, 2026
Guide to Selecting High Quality gravity paddy separator manufacturers
Nov. 02, 2026
Double Air Screen Cleaner: answers on cleaning, capacity and orders
