Flowability of certain powders is sometimes so poor that extraction from bins or silos with flow aids like fluidization pads, pneumatic hammers, hammer blasts or air cannons is impossible. The Bin Activator is the ultimate flow aid and extracting device for such materials. To fit the Bin Activator,the silo cone has to be shorter than usual,leaving a wide outlet section. A flange supplied together with the Bin Activator is welded to the silo outlet on site. Special spring suspensions and a flanged polymer seal form a flexible connection between silo and Bin Activator.