= Rotary feeder
{wiki=Rotary_feeder}
A rotary feeder, also known as a rotary valve or rotary airlock, is a mechanical device used to control the flow of bulk materials, often in pneumatic conveying systems. It typically consists of a rotating element, usually in the form of blades or vanes, housed within a cylindrical body. The primary function of a rotary feeder is to allow material to discharge from a hopper or silo while preventing air from entering the system, maintaining a sealed environment and controlling the pressure differential.
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