Vacuum feeding is mainly used in food, plastic processing (conveying plastic particles), pharmaceutical and chemical fields. Vacuum feeder is a kind of conveying equipment that transfers particles and powder materials by means of vacuum suction. It is widely used in the production and scientific research fields of food, pharmacy, chemical industry, ceramics, feed, pigment and agricultural products. The use of vacuum feeder can greatly reduce the dust pollution in the workshop, improve the cleanliness, significantly improve the productivity, save a lot of manpower, reduce pollution, and be safe, explosion-proof and reliable.