PD pump performance
PD pump performance
(OP)
Hye,
I would like to seek any expert view.
If i want to buy the positive displacement pump, do I need to provide the NPSHa value?
And what is the impact to this pump performance if the NPSHr value is higher than NPSHa?
Thank you.
I would like to seek any expert view.
If i want to buy the positive displacement pump, do I need to provide the NPSHa value?
And what is the impact to this pump performance if the NPSHr value is higher than NPSHa?
Thank you.





RE: PD pump performance
If NPSHA < NPSHR, the pump may not work, could suffer damage or at the least performance would suffer.
Different PD pumps have different capabilities for NPSH.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: PD pump performance
FYI, the medium transfer is fuel with viscosity about 20cSt at 20degC.
With PD pump gear type, why this pump couldn't work if the NPSHa<NPSHr?
Is it because of the cavitation will be occurred at the inlet pump?
Or pressure loss in the pipeline resist the pump to operate?
RE: PD pump performance
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: PD pump performance
Tq