- 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
- contamination with/of motive fluid
nearly no limitation and two or more ejectors can be arranged in parallel.
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
Ejectors - FAQ's
vacuum ejector manufacturers
vacuum condenser manufacturers
HEI Steam Jet Vacuum Systems Troubleshooting Guide
Designing Steam Jet Vacuum Systems
GEA Jet pumps
compression ratio (K) = discharge pressure divided by suction pressure.
(Both pressures have to be expressed in consistent, absolute pressure units.)
expansion ratio (E) = motive pressure divided by suction pressure.
(both pressures have to be expressed in consistent, absolute pressure units.)
Flow ratio = suction flowrate divided by motive flowrate
(both are expressed in consistent mass terms.)