Advantages of Mechanical Pumps

On hot condensate applications, mechanical pumps have numerous advantages against electrical Pumps.
No cavitation : There is no mechanical work ,the pressure is given by a motive fluid.
NPSH is not needed : The required distance between the receiver and the pump is maximum 300 mm.
Low maintenance costs : Cavitation does not occur that is why parts service life is much longer.
System can be closed: Save energy by using all the heat content of steam. Mechanical pumps can even work on vacuum.
Energy efficient: Do not use electrical energy Receiver size is smaller. (condensate accumulation is not needed,).
Non-electrical equipment : can be used in explosive areas, lower installation costs.
Pump handles hot condensate : as cavitation does not occur, condensate can be close to saturation temperature (more that the 99◦C limit of electrical pumps). Higher condensate temperature decreases solubility of non-condensable gases.