Silos are charged and discharged continuously. When charging, the air in the silo has to exit, but not the product being charged. Filtration mostly also works during discharge, in order to protect the stored product from external contaminants.
Filtration in this application has to evaluate the following specific parameters:
- product contained in the silo: type, particle size, charging/discharging velocity
- possible presence of contaminants, above all humidity
- possible presence of electrostatic charges, therefore risk of fire/explosion
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