The process by which the material is moved by air through the pressure wall plate of the silo.
The rubber pressure wall plate is arranged in the hopper, which is fixed in the inner wall of the silo, the air is periodically through, and the wall plate expands, forcing the material into the flow channel.
Air pressure should be controlled to prevent excessive inflation, the wall plate size and installation to adapt to the storage hopper geometry.  Inflatable device with controllable gas injection method is very easy to inflate, but also easily through a variety of inflatable devices to unload material from the hopper or to the process of feeding. Inflatable must use dry and clean air, but also control dust, when necessary, use a dust collector.