Pump Capacity
Pump Capacity
(OP)
Hi all
I am wondering, if a pump is rated at 250 m3/h (40 m head, 40 kW motor), can it actually deliver 250 m3/h?
Thanks very much
Miss Aida Hanani
Plant Engineer
I am wondering, if a pump is rated at 250 m3/h (40 m head, 40 kW motor), can it actually deliver 250 m3/h?
Thanks very much
Miss Aida Hanani
Plant Engineer





RE: Pump Capacity
Cheers,
John
RE: Pump Capacity
Why didn't you post a pump performance curve - removes all guess work.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Pump Capacity
I hate Windowz 8!!!!
RE: Pump Capacity
As my learned other posters note above if everything is as it should be then yes it will pump / deliver 250m3/hr.
However a presumably centrifugal pump is a very flexible beast and in reality could pump anywhere from approx. 100 to 400m3/hr if the downstream system provides a different system curve compared to what it was designed to do. Centrifugal pumps are not fixed units of flow - the duty point or name plate is just the point at which the pump is close to its best efficiency point (BEP) and not much else.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Pump Capacity
If system resistance is higher than 40m, then it will deliver less flow.
If system resistance is lower than 40m, it will deliver more flow.
The pump "can" deliver any flow on the curve. They system resistance determines the flow that the pump "may" deliver at any point in time.