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[ravironaldo]

Suppose we've a centrifugal pump which can generate a head of 5m. If someone cut the pipe at exactly 5m, in that case what will happen? water will keep moving or it will stop exactly at 5m? I know it may be a silly question, but can anyone help me out?

 

[fallah]

Hi,

 

Appears you are describing the pumping system with atmospheric pressure at source and destination and also with discharge pipe in vertical upward position. Pump head equal to 5 m means the pump has TDH of 5 m at given flowrate and depending on suction head value, friction loss,... the discharge head could be higher than 5 m.

 

Anyway, the pump can lift the liquid till the elevation corresponding to the TDH at shut off (no flow) and yes, when the liquid elevation in vertical discharge pipe would reach to that point the liquid will stop while the pump is still running... 

Edited by fallah, 10 July 2013 - 11:25 PM.