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DOVAC Vacuum 2 stage

Advanced Vacuum Solutions

A DOVAC two-stage side channel fan works in a similar way to a single stage side channel fan, but it has an extra stage that provides a higher compression ratio and deeper vacuum than a single stage. This design offers higher vacuum degree and efficiency than a 1-stage side channel fan.

Two-stage side channel blowers are used in applications where a deeper vacuum or higher pressure is required than what a single stage can provide. These applications can include vacuum lifting equipment, vacuum packaging machines, medical equipment and industrial processes that require high vacuum or greater differential pressure.


  • Type ZDI-2, two-stage side channel fan.
  • Compactly built blower
  • Air-cooled
  • Non-contact compression
  • Virtually maintenance free
  • Low-vibration operation
  • Deployable for overpressure and vacuum applications
  • Deployable up to differential pressure:
  • 2-stage blowers max. 600 mbar

Main application areas:

Packaging industry: Side channel fans are crucial in the packaging industry to create vacuum for packing various products, from food to pharmaceuticals. They deliver consistent vacuum force that contributes to effective packaging processes and extends product freshness.

Laboratory Research: Vacuum systems are used in laboratories for a variety of purposes such as evaporation processes, material coating and maintaining controlled environmental conditions for experiments.

Medical Equipment: Side channel ventilators are essential in medical equipment, including vacuum pumps for medical suction systems and extractors, important for surgery, dentistry and medical research in hospitals and laboratories.

Industrial Automation: These fans are used for vacuum grippers and lifters within industrial automation, providing a powerful and reliable vacuum source for handling and moving materials in production processes.

Environmental engineering: Side channel fans are indispensable in environmental engineering processes such as air and gas purification, water treatment and soil remediation, where they help remove contaminants and maintain optimal conditions.

Process industry: In industries such as chemical, pharmaceutical and food processing, side channel blowers are fundamental to creating vacuum for various process steps, from filtration to material drying, providing essential, consistent vacuum force for efficient and precise processes.



150 200 250 300 350 400 450 500
BLOWER TYPE kW Maximum pressure difference mbar FLOW AT HIGHER PRESSURE DIFFERENCE in m3/h diluted air
ZDI80-2-075-3 0,75 210 35 20
ZDI150-2-15-3 1,5 280 95 75 55
ZDI150-2-22-3 2,2 320 95 75 55 30
ZDI210-2-3-3 3 340 160 165 110 80 60
ZDI210-2-4-3 4 390 160 135 110 80 60
ZDI320-2-3-3 3 250 250 225 200
ZDI320-2-4-3 4 380 250 225 200 170 140
ZDI320-2-55-3 5,5 430 250 225 200 170 140 110
ZDI500-2-55-3 5,5 260 280 200
ZDI550-2-75-3 7,5 350 495 460 435 395 365
ZDI550-2-11-3 13 430 495 460 435 395 365 250