Editing Injector (section)

== Steam injector ==
The steam injector is a common device used for delivering water to steam boilers, especially in steam locomotives. It is a typical application of the injector principle used to deliver cold [[boiler feedwater|water]] to a boiler against its own pressure, using its own live or exhaust steam, replacing any mechanical [[pump]]. When first developed, its operation was intriguing because it seemed paradoxical, almost like [[perpetual motion]], but it was later explained using [[thermodynamics]].<ref name="goldfinch2">{{cite book|last1=Goldfinch & Semmens|title=How Steam Locomotives Really Work|date=2000|publisher=Oxford University Press|isbn=978-0-19-860782-3|pages=94–98}}</ref>  Other types of injector may use other pressurised motive fluids such as air.