Vacuum pneumatic conveying
Vacuum pneumatic conveying is particularly suited for products which are sensitive to heat such as sugar, which are hygroscopic or which contain fat and tend to stick, such as milk powder or cocoa. Medium to long distances can be covered from 20 to 150 m. Material is usually picked up from silos or storage bins to supply one or more mixers.
- Transfers product without heating;
- Dust-free system;
- Multi-product transport;
- No product left in the pipework;
- A receiving point can be supplied from several feed sources;
- System easy to modify by adding extra receiving points;
- Low pressure loss;
- High transport speed from 18 to 40 m/s.
Vacuum pneumatic conveying transports material by creating negative pressure inside a sealed pipe. Product is introduced into the piping system through an automatic controller such as a valve or screw. A suction pump sets up a vacuum in the pipework. A uniform air/product mixture is created (dilute phase) and the product is then transported to the point of destination. The product is separated from the air by a filtration system which feeds into a receiving hopper.