ejectors

advantages:

• simple way to create a vacuum
• safe and reliable
• no moving Parts, nearly maintenance free
• relatively unexpensive (the condensers are expensive)
• corossion resistant materials available

disadvantages:

• contamination with/of motive fluid

suction capacity:

• 10m³/h to 30.000m³/h
• Capacity:
  nearly no limitation and two or more ejectors can be arranged in parallel.
• Vacuum:
  A single stage operating alone will produce pressures in the range of about 50 - 100 mbarA up to atmospheric pressure.
  Two stages will produce pressures between 10 mbarA and 100 mbarA, while three stages will produce between 1 mbarA and 30 mbarA.

Croll-Reynolds vacuum system with surface type condensers




Körting: vacuum system with spray condensers, two stages without inter-condenser spray condensers with barometric legs 4th stage as a lquid ring vacuum pump