Food is placed in a vacuum bag and loaded inside packaging chamber (manual chamber machines), or onto a conveyor line for continuous advancement to multiple chamber heads (rotary chamber machines). Air is evacuated. Gas flushing of an O2 and CO2 gas mixture or N2 may be utilized for a modified atmosphere. Bag is heat-sealed automatically. Chamber is vented to atmosphere. Product is removed and cycle continues. 

Typical pump range is single stage 10 to 2,000 m3. h-1 including blowers. Leybold products sold include SOGEVAC and RUVAC.

Pump temperature

High

Heavy duty operation (cycles)

Medium

Dust / Powder / Particules

Low

Moisture

Medium