Can a variable-frequency drive be used with a positive displacement pump to achieve a flow rate regulation range of 0-100%? Why?

2017-01-11 View Original

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Can a variable-frequency drive be used with a positive displacement pump to achieve a flow rate regulation range of 0-100%? Why? What is the difference from variable frequency control of centrifugal pumps? ?

Reply #2 2017-01-11

The displacement per rotation of a positive displacement pump is fixed, while the flow rate depends on the speed of rotation; if the rotation speed can be adjusted over a wide range, the adjustable range of the flow rate increases as well.

Reply #3 2017-01-11

Frequency conversion control is rarely used for full-range adjustment, and the same is true for centrifugal pumps

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Can a variable-frequency drive be used with a positive displacement pump to achieve a flow rate regulation range of 0-100%? Why?

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