Pneumatic feeders are devices that use air pressure to move materials, typically in manufacturing and processing industries. They transport bulk materials like grains, powders, or pellets through pipes or tubes, ensuring a steady flow to various equipment, such as conveyors or mixers. These feeders operate by creating a vacuum or positive pressure, which helps to lift and push the materials along the designated path. They are efficient and can handle a wide range of materials, making them suitable for applications in sectors like food processing, pharmaceuticals, and plastics.