
According to the provisions of GB17440 which illustrate "Grain processing, storage and transportation system dust explosion-proof safety Regulations", the silo belongs to the dust explosion-proof 20 zone environment in China. Therefore, the electrical equipment in the silo needs to meet the relevant requirements of the dust explosion-proof 20 zone environment. At present, most of the motors of the conventional sweep augers on the market are installed inside of the silo. These products need to equip with dust explosion-proof 20 zone motors according to the regulations. However, there are no dust explosion-proof 20 zone motor products available domestically and internationally. Lots of companies have to use sweep auger products with dust explosion-proof 21 zone motor. There are certain safety risks.
Therefore, how to prevent the safety hazard from placing equipment equipped with electric motor in silos has became an important technical problem for many technicians in this field.
Hongrui research team is here to provide the solution by designing this external motor sweep auger which both prevent the explosion risk and ensure the efficiency of the operation.



Main materials | carbon steel |
Specifications | Customized to the size of the grain silo |
Applicable working conditions | Cleaning the remaining material at the bottom of a shallow round silo after the material (corn, soybeans, wheat, aluminum powder, rapeseed, etc.) finishes self-flowing. |
Applicable materials | corn, soybean, wheat, rice, etc. |
Applicable silos | Flat-bottom silo |
Applicable silo diameters | 12-36m |
Clearing capacity | 30-400tph |
Equipment advantages | Reduce noise,Improve safety |






What are the applications of the sweeping equipment?
Our equipment can be used in flat-bottom silo, cone-bottom silo and grain shed silo, for unloading and sweeping the grain bulk materials such as wheat, corn, soybean, bran, soybean-meal, etc.
What kind of trade do you support?
EXW/FOB/CRF/CIF, other forms are available.
What is your installation and after - sales service policy?
We provide remote installation and after-sales service, as well as on-site installation and after-sales service by professional personnel.