Editing Injector (section)

==Modern uses==

The use of injectors (or ejectors) in various industrial applications has become quite common due to their relative simplicity and adaptability. For example:

* To inject [[chemicals]] into the boiler drums of small, stationary, low pressure boilers. In large, high-pressure modern boilers, usage of injectors for chemical dosing is not possible due to their limited outlet pressures.
* In [[thermal power station]]s, they are used for the removal of the boiler [[bottom ash]], the removal of [[fly ash]] from the hoppers of the [[electrostatic precipitator]]s used to remove that ash from the boiler [[flue gas]], and for drawing a vacuum pressure in [[steam turbine]] exhaust [[surface condenser|condensers]].
* Jet pumps have been used in [[boiling water reactor|boiling water nuclear reactors]] to circulate the coolant fluid.<ref>{{cite web|url=http://www.freepatentsonline.com/4847043.html|title=Steam-assisted jet pump|publisher=General Electric|quote=United States Patent 4847043 ... recirculation of a coolant in a nuclear reactor|access-date=17 March 2011}}</ref>
* For use in producing a vacuum pressure in [[steam jet cooling]] systems.
* For expansion work recovery in air conditioning and refrigeration systems.
* For [[enhanced oil recovery]] processes in the oil & gas Industry.
* For the bulk handling of [[cereal|grains]] or other granular or powdered materials.
* The construction industry uses them for pumping [[turbid]] water and [[slurry|slurries]].
* Eductors are used in ships to pump residual [[ballast]] water, or cargo oil which cannot be removed using centrifugal pumps due to loss of suction head and may damage the centrifugal pump if run dry, which may be caused due to [[:wikt:trim|trim]] or [[Angle of list|list]] of the ship.
* Eductors are used on-board ships to pump out bilges, since using centrifugal pump would not be feasible as the suction head may be lost frequently.
* Some aircraft (mostly earlier designs) use an ejector attached to the fuselage to provide vacuum for gyroscopic instruments such as an [[attitude indicator]] (artificial horizon).
* Eductors are used in aircraft fuel systems as transfer pumps; fluid flow from an engine-mounted mechanical pump can be delivered to a fuel tank-mounted eductor to transfer fuel from that tank.
* [[Aspirator (pump)|Aspirator]]s are vacuum pumps based on the same operating principle and are used in [[laboratories]] to create a partial vacuum and for medical use in [[suction]] of mucus or bodily fluids.
* [[Water eductor]]s are water pumps used for dredging silt and panning for gold, they're used because they can handle the highly abrasive mixtures quite well.
* To create vacuum system in vacuum distillation unit (oil refinery).
* Vacuum autoclaves use an ejector to pull a vacuum, generally powered by the cold water supply to the machine.
* Low weight jet pumps can be made out of paper mache.