Where are vacuum and/or overpressure pneumatic conveying systems employed?

The pneumatic conveying of bulk goods is a proven and efficient method for transporting dusts, powders, granulates and other fluidizable materials quickly and reliably within a production site. Differentiation is made between pneumatic suction conveying and pneumatic overpressure conveying – that is, conveying with vacuum or overpressure.

Pneumatic suction conveying is always used when sensitive materials require transportation without contacting the ambient air. Pneumatic suction conveyor systems are primarily used in the food industry, in the plastics processing industry for transporting granulates, and in the pharmaceutical and chemical industries.

Pneumatic overpressure conveying, on the other hand, is used for relatively heavy materials such as sand, gravel and cement.

It is also possible to transport high-volume and moist materials using vacuum conveyors, for example in the disposal of wet waste or the transportation of bark mulch.

The bulk materials are blown along pipelines to their destination, greater pressure differentials are possible so heavier products such as sand, gypsum and cement may be transported. Overpressure conveyor systems are efficient, economical and reliable, but the products conveyed should be inert to oxygen. For this reason, pneumatic overpressure conveyors are rarely used in the food processing industry.

Recommended models: RH12542, RH15052, RH20053  rotary lobe blowers.