Injector

An injector is a system of ducting and nozzles used to direct the flow of a high-pressure fluid in such a way that a lower pressure fluid is entrained in the jet and carried through a duct to a region of higher pressure. It is a fluid-dynamic pump with no moving parts except a valve to control inlet flow.

Depending on the application, an injector can also take the form of an eductor-jet pump, a water eductor or an aspirator. An ejector operates on similar principles to create a vacuum feed connection for braking systems etc.

The motive fluid may be a liquid, steam or any other gas. The entrained suction fluid may be a gas, a liquid, a slurry, or a dust-laden gas stream.^[1]^[2]^[3]

^ Perry, R. H.; Green, D. W., eds. (2007). Perry's Chemical Engineers' Handbook (8th ed.). McGraw Hill. ISBN 978-0-07-142294-9.
^ Power, Robert B. (1993). Steam Jet Ejectors For The Process Industries (First ed.). McGraw-Hill. ISBN 978-0-07-050618-3.
^ Yarong, Wang; Peirong, Wang (2021). "Analysis of the adiabatic process by using the thermodynamic property diagram of water vapor". E3S Web of Conferences. 252: 03055. Bibcode:2021E3SWC.25203055Y. doi:10.1051/e3sconf/202125203055. S2CID 238022926.

[1] Perry, R. H.; Green, D. W., eds. (2007). Perry's Chemical Engineers' Handbook (8th ed.). McGraw Hill. ISBN 978-0-07-142294-9.

[2] Power, Robert B. (1993). Steam Jet Ejectors For The Process Industries (First ed.). McGraw-Hill. ISBN 978-0-07-050618-3.

[3] Yarong, Wang; Peirong, Wang (2021). "Analysis of the adiabatic process by using the thermodynamic property diagram of water vapor". E3S Web of Conferences. 252: 03055. Bibcode:2021E3SWC.25203055Y. doi:10.1051/e3sconf/202125203055. S2CID 238022926.

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