{"id":7345,"date":"2020-01-17T14:38:24","date_gmt":"2020-01-17T13:38:24","guid":{"rendered":"https:\/\/www.tempco.it\/blog\/?p=7345"},"modified":"2020-01-17T14:38:32","modified_gmt":"2020-01-17T13:38:32","slug":"how-does-it-work-a-centrifugal-pump","status":"publish","type":"post","link":"https:\/\/www.tempco.it\/blog\/en\/7345\/how-does-it-work-a-centrifugal-pump\/","title":{"rendered":"How does it work a centrifugal pump?"},"content":{"rendered":"

Back on track with our Tempco tutorial video<\/a><\/strong> series in this new year, let\u2019s talk about fluid motion, being it water, oil or other kind of fluids. In particular let\u2019s talk about how a centrifugal pump works<\/strong>.<\/p>\n

A centrifugal pump is a hydraulic machine in shape of a rotative pump<\/strong>, that can be directly coupled with an electric motor<\/strong> or via a joint. As it often happens, Tempco customers ask how centrifugal pumps should work in order to operate properly \u2018in range\u2019.
\nIf we look at a common functioning curve of a centrifugal pump<\/strong>, flow rate<\/strong> and pressure values<\/strong> happen to be inversely proportional: when flow rate is at its maximum the pressure is minimum, viceversa maximum pressure corresponds with minimum flow rate.<\/p>\n

\"pompa<\/a><\/p>\n

With the outlet of the pump completely closed<\/strong>, with water delivery off, we\u2019ll thus have maximum pressure value<\/strong>. Customers often contact us telling the pump is undergoing a huge effort while pushing water at a high pressure. If we take a look at the electric power absorption curve<\/strong> of the motor, we\u2019ll see that the power input of the electric motor is inversely proportional to the pressure value generated by the pump.<\/p>\n

\"rendimento<\/a><\/p>\n

Otherwise, a maximum pressure value<\/strong> is combined with minimum power consumption of the electric motor<\/strong>, which instead goes maximum when the pressure is at its minimum.
\nThe reason relies upon the mechanical functioning of a centrifugal pump, which moves the maximum flow rate when the pressure is at its minimum, pushing high weights of fluid<\/strong> putting the electric motor under big efforts, meaning high power consumption<\/strong>.<\/p>\n

To make an empirical example, the same happens when we try to move a huge weight for a short space distance, it takes a very big effort.<\/p>\n