Nov
grain destoner technical analysis and manufacturing specifications
We supply high-performance gravity separators with a capacity of 6–15 TPH and power of 13.2 kW. Designed to efficiently remove blighted, rotten, and moldy seeds from sesame, beans, and groundnuts, they help maintain consistent purity. Available from a China-based factory and suppliers; CE/SGS-certified units are provided.
The Gravity Separator is a high-precision industrial machine designed to sort granular materials based on the critical difference in specific gravity between the main product and its impurities. By combining controlled vibratory action with aerodynamic airflow, the equipment efficiently removes shriveled, sprouted, damaged, rotten, moldy, and non-viable seeds from a wide range of legumes, grains, and seeds—ensuring that only high-quality produce proceeds to the final stage of processing.
Built for versatility and long service life, this gravity separator is an essential solution for processing plants handling sesame, soybeans, mung beans, kidney beans, chickpeas, coffee beans, and peanuts. Through a controlled stratification process—where lighter particles rise and heavier particles settle—the system accurately separates materials of the same size but different densities, increasing the purity and commercial value of the final agricultural output.
| Core Components | Gravity table, wooden frame, 7 wind boxes | Drive System | Vibration motor & fan motor |
|---|---|---|---|
| Control System | Advanced frequency converter | Table Material | High-quality stainless steel (table facets) |
| Frame Material | Premium beech wood | Bearing Standard | Industrial-grade, high-quality bearings |
| Feeding System | Low-speed, no-broken slope elevator | Sorting Principle | Aerodynamic & vibratory friction |
| Application Scope | Legumes, grains, and seeds | Adjustability | Variable vibration frequency |
Uses multi-stage specific gravity classification for highly accurate impurity removal.
Specialized screen design supports smooth flow for small beans and helps minimize breakage.
A stable sorting process delivers high-purity finished products with minimal waste.
Single-machine operation enables processing of multiple bean varieties through frequency control.
A low-speed slope elevator helps prevent seed breakage during loading and material transfer.
Stainless steel sieves and tables support food-processing hygiene requirements.





Integrated low-speed elevators help maintain seed integrity during feeding.
Adjust the vibration speed to match the specific density of different beans.
Seven wind boxes provide precise aerodynamic suspension of particles.
Beech wood frames provide stability for efficient, long-term vibration operation.
Stainless steel components help prevent contamination in food-grade plants.
Japanese bearings and brand-name motors help ensure consistent operational performance.
| Comparison Factor | Traditional Sifting | Our Gravity Separator |
|---|---|---|
| Purity Level | Basic size sorting | High-precision density sorting |
| Seed Damage Rate | Moderate to high | Ultra-low (slope elevator) |
| Versatility | Single-crop focus | Multi-bean adaptability |
| Operational Cost | High manual re-sorting | Automated, high-efficiency operation |
| Product Value | Standard market grade | Premium export grade |
A color sorter removes impurities based on visual appearance, whereas a gravity separator removes impurities based on specific gravity (density). This makes it particularly suitable for removing insect-damaged or shriveled seeds that may appear identical in color to healthy ones.
Yes. The machine is highly flexible. With the integrated frequency converter, you can adjust the vibration frequency to suit sesame, soybeans, mung beans, chickpeas, coffee beans, and more.
Conventional elevators can create mechanical impact that may crack fragile seeds. Our low-speed slope elevator transports grains gently, helping maintain the physical integrity of the product.
We use high-quality stainless steel for the table facets and sieves to help prevent rust and contamination, supporting compliance with food processing hygiene practices.
The process combines airflow (to suspend the material) and vibratory friction (to stratify it). Lighter impurities rise and flow downward, while heavier finished products move upward.
No. Using Japanese bearings, premium beech wood frames, and brand-name motors, the machine is designed for long-term durability and minimal maintenance cycles.