centrifugal electric motor driven pump 2

[hal1981]

Hi all
i'm very confused about centrifugal electric motor driven pump!
what happened to pump amperage, when discharging valve closed 50% and less 10%?
thanks

 

[DRWeig]

Move less water, draw less power, therefore less current.

For exact relationship, you need pump curver and motor characteristics.

Good on ya,

Goober Dave

 

[ione]

Well, not that easy

Suggest to give a read to this

http://www.gouldspumps.com/cpf_0009.html

And the conclusion will be: it depends.

 

[DRWeig]

Yes, ione, your link is much more complete than my answer, and I think there can be circumstances that would provide exception.

My experience, though, has never revealed a centrigugal pump that did not behave that way. Limited to HVAC chilled water and hot water pumps, though. They all have very similar characteristics.

I should have elaborated, but my phone was ringing!

Good on ya,

Goober Dave

 

[hal1981]

thanx!