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Stable and Unstable Centrifugal Pumps Characteristics of stable and unstable centrifugal pumps

Stable and Unstable Centrifugal Pumps

Characteristics of stable and unstable centrifugal pumps

For stable head-flow characteristics the differential head - h - progressively falls with increasing flow rate - q.

stable centrifugal pumps

For unstable head-flow characteristics the differential head - h - rises to a maximum and then progressively falls with increasing flow rate - q.

unstable centrifugal pumps

An unstable pump may start to oscillate between the two possible combinations of head-flow. The flow rate will modulate and the pipeline vibrate.

It is recommended that centrifugal pumps are designed and operated under stable conditions.


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