Steam Ejectors / Steam Jet Pumps

Steam Ejectors
Steam ejectors suck in steam or vapour at low pressure and compress it to a higher pressure. They mainly consist of three parts: the power nozzle, a head piece and a venturi-shaped pipe, the diffuser. In general steam serves as propellant. But other gases may be used as well. Any steam ejector may overcome only a certain pressure drop.

Steam Jet Pumps
In case of larger pressure difference several steam ejectors are connected in series (steam jet pumps) in which case condensers are installed between the stages in order to condensate the power steam of the steam ejector.