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Pneumatic conveying with vacuum and overpressure

Pneumatic conveying. The transfer of bulk materials or powders through a closed conveying pipeline. By means of flowing air. Transmitting a pulsation force on the materials to be conveyed.


How does pneumatic conveying work?

Pneumatic conveying is a proven and efficient method for the transport of bulk goods. Such as dusts, powders, granules and other fluidizable materials. Quickly and reliably. From one place within a production site to another.

We differentiate between two common techniques: Pneumatic suction conveying and pneumatic overpressure conveying. Depending on whether vacuum or overpressure is applied.

Pneumatic suction conveying

Pneumatic suction conveying is used for the transport of sensitive materials. To avoid any contact with the ambient air.
Therefore, pneumatic suction conveyors are the systems of choice in the food, pharmaceutical and chemical industry. As well as for transporting granules in plastics processing applications.
Moreover, vacuum conveyors can handle moist materials. For example, in the disposal of wet waste or the transport of bark mulch.

Pneumatic overpressure conveying

Pressure conveyor systems are similar to their vacuum counterparts. But work with overpressure.
The bulk materials are blown along pipelines from the source to their destination. With pneumatic overpressure conveying, high pressure differentials are possible. Therefore, even heavy products can be transported. For example, sand, gypsum and cement.

Busch vacuum technology in pneumatic conveying

No matter which materials are transported on your premises. We offer the perfect vacuum or overpressure solution to convey them safely and efficiently.

Applications where pneumatic conveying is used

Pneumatic suction conveying of foodstuffs
Pneumatic suction conveying offers an efficient and contaminant-free way of transporting foodstuffs. Either in free-flowing granular or powder form. The products are fluidized through the air flow generated by the vacuum pump. And move freely along pipelines to their destination.

The vacuum in the conveyor ensures that the transported goods have only minimal contact with atmospheric oxygen. Thus, preserving the product aroma. If required, the transport medium can be an inert gas such as CO2. Allowing to further preserve product quality and freshness.

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Pneumatic suction conveying of plastic pellets
Pneumatic suction conveyors are frequently used in the plastics industry. To feed plastic granules and additives into processing equipment. Such as extruders or injection molding machines.

These conveyor systems have several advantages: They are clean, efficient and nearly maintenance-free. And allow for an outstandingly smooth transport. Avoiding excessive abrasion or breakup of the raw material. Moreover, pneumatic suction conveyors are relatively easy to reconfigure. Which reduces the cost of production line alterations.

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Wet-waste conveying
Pneumatic conveying is commonly used in wet waste systems. Wherever wet refuse and leftovers need to be disposed or reprocessed: In hotels, hospitals and canteens. But also in slaughterhouses, fish processing companies and cruise liners.

A vacuum conveyor transports the waste material to a receiving container. Where it is shredded, homogenized and stored for later collection. The system is hygienic, efficient and environmentally friendly. Allowing waste to be reprocessed to manufacture biogas, animal feed or fertilizer.

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Pneumatic suction conveying in the chemical and pharmaceutical industry
Pneumatic conveying is commonly used as a gentle transport method in the chemical and pharmaceutical market. To move raw materials, solvents, intermediates and finished powders. With the help of vacuum, they are safely conveyed from one place to another. Without any risk of toxic or flammable materials escaping into the environment during transport.

If materials with a high risk of explosion need to be processed, ATEX-certified vacuum pumps further increase safety. Moreover, the products are not degraded during transport. Because being conveyed under vacuum, they only have minimal contact with atmospheric oxygen.

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Pneumatic Conveying in practice

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