Vacuum feeder, also known as vacuum conveyor, is a kind of dust-free airtight pipeline conveying equipment that conveys granular and powdery materials by means of vacuum suction. The air pressure difference between vacuum and environmental space is used to form gas flow in the pipeline and drive powder. The material moves to complete the powder transportation. my country has introduced advanced foreign vacuum technology, continuously improved and improved, and is now widely used in various light and heavy industries such as chemical, pharmaceutical, food, metallurgy, building materials, agricultural and sideline industries.