From operation point of view which vacuum system is effective for different working conditions? Steam ejector system or vacuum pump (ring type).

Steam ejectors are widely used because of simple operation, and low maintenance cost.

steam ejector system is more effetive and low maintainance cost. and its not riski then vacuum pump.

steam ejector is good because it has a lesser moving part it works on the principle of pressure energy it creates a low-pressure zone at the nozzle suction which pushes the air through the converging section the diverging section 

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