Steam jet liquid pump
Steam Jet Liquid Pumps also called ejectors, employ steam, or possibly another vapour, as the motive medium to lift and entrain liquids. They can be used on simple duties, like lifting rainwater/spillage from tank bunds, or, as the motive steam condenses and is intimately mixed with the suction medium, they can also be employed on more specific applications, where the duty is to lift, heat and convey a liquid.
Construction and mode of operation
The 3 main components of steam jet liquid pumps are head, diffuser and motive nozzle.
The steam jet emerging from the motive nozzle at high velocity transmits its kinetic energy to the liquid, mixes with it and condenses. In this way, the liquid is conveyed and its pressure is increased at the same time.
These pumps operate like a steam jet vacuum pump and evacuate the suction pipelines. They are, therefore, self-priming.
Special properties
- simple erection and servicing
- no moving parts, therefore, no wear
- maintenance-free
- great reliability and safety of operation
- long life
- low cost
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