Syphons are jet pumps which use steams as motive fluid and entrain and lift a liquid against gravity or pressure with simultaneous heating.
In operation, the motive steam expands at the nozzle and enters to the mixing chamber as a high velocity jet. The jet entrainment action sucks up the surrounding liquid and accelerate it as time the steam condensation creates a pumping effect. The condensate and water mixture experiment a discrete pressure increase and take intermediate velocity at the syphon throat. At the diffuser it deaccelerate converting the kinetic energy into additional compressive work.



- Liquid pumping
- Priming of pipes 
- Empting of sumps and cutwaters