What is the flow rate of a pump? What is the relationship with medium density?
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What is the flow rate of a pump? What is the relationship with medium density? For example: if the flow rate indicated on the nameplate is 100 cubic meters, and the density of the fluid pumped by this pump is 0.5, then does the indicated flow rate refer to 100 cubic meters of clean water, or 100 cubic meters of fluid with a density of 0.5? Of course, the pressure head remains at the value specified for normal operating conditions.
Personally, I think it should be the flow rate when flushing with clean water. When printing on a medium with a density of 0.5, to keep the plunger pressure and flow rate constant, the performance must be doubled. Is that so?
The flow rate indicated on the nameplate is 100 cubic meters. Given that the density of the fluid handled by this pump is 0.5, does the indicated flow rate refer to 100 cubic meters of clean water, or 100 cubic meters of fluid with a density of 0.5? The pump is driven by the motor supplied, and its head remains at the rated value. If 100 cubic meters of clean water need to be pumped, a larger motor is required.
So, if the head requirement is met, is it sufficient to choose a water pump with a flow rate of 200 cubic meters, along with a certain margin of safety?
Have I misunderstood it? The flow rate indicated on the nameplate is the flow rate for a medium with a density of 0.5
m3/h is the volume flow rate, which is independent of the density of the medium; the same volume of fluid is transferred regardless of what liquid it is, with only differences in density, motor load, and outlet pressure. It is the mass flow rate in t/h that is related to the density
Right. You are right. The higher the density, the greater the load should be, and the higher the motor power required. However, for a specified pump, its performance is fixed. I wonder whether the flow rate and head indicated on the nameplate are based on data for water as the medium, or on the conditions of the actual medium in use?
Flow rate and head are only related to the pump’s impeller. Density determines the power level of the motor