Centrifugal pump head problem
Thread Content
I would like to ask everyone: 1. If the total head of a centrifugal pump is 25 m and the suction head is -5 m, then is the pressure head at the pump outlet 20 m? 2. If a centrifugal pump with a total head of 25 m and a suction head of 0 m has a static water pressure of 5 m at its inlet (the water level at the inlet is 5 m higher than the pump’s inlet), then is the actual outlet head of the centrifugal pump 25 m or 30 m? 3. Replace the centrifugal pump mentioned in point 2 with positive-displacement pumps such as gear pumps or screw pumps, while keeping the outlet head at 25 m, right?
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I’m not good at English; please speak in Chinese. Thank you