The relationship between the pump impeller and flow rate/head
Thread Content
There is one existing magnetic drive pump with a flow rate of 6 m3/h and a head of 20 meters. Is it feasible to adjust the pump’s flow rate and head by changing the size of the impeller? What do you think?
I don’t think it’s possible! It is easy for the cutting impeller to cause uneven balance!
Don’t the flow rate and head need to be that high? If it never needs to be this large, it can be cut. If it’s only temporary, don’t cut it; adjust it instead using the valve. Another option is to replace the motor with an inverter-driven one, using frequency conversion for regulation. It depends on your specific situation.
According to theoretical calculations, the flow rate is proportional to the first power of the impeller diameter, while the head is proportional to the square of the impeller diameter. If the flow head is excessive, considering cutting the impeller may be an option.
It is possible, but professional calculation and cutting are required; it cannot be cut casually
Hello, what needs to be done to replace the variable-frequency motor?
The flow rate should be adjusted using valves and piping connections, while the head can be adjusted by changing the diameter of the impeller; provided that the reduction in the impeller’s diameter does not exceed 20%. It is advisable to perform balancing after such adjustments, as the flow rate will also decrease as a result
It must be feasible; that’s how it’s supposed to be done.
Even with an inverter for such a small motor, it may take decades before the investment is recouped. :L