I contacted sulzer and found that the best BB5 pump they can offer is with 57% efficiency which is about 16% more efficiency than the one we selected. However they told me that head rise to shutoff is an issue for those pumps as well.
Thanks. However as I asked from my colleagues, at that time it was a best pump on technical evaluation to select from. I am still not sure whether it is easy to find a centrifugal pump with much better efficiency since these BB pumps are working at low capacity and high head. BTW, we are...
Thank for you support, it helped a lot. I have attached pump curve. Take note that rated flow is 41.25 cubic meters per hour and total head is 1055 m. it is a low capacity high head pump as 1gibson said. As you can see from curve pump is operating at 70% BEP. I was thinking about rejected pump...
OK, we have written in our spec that parallel operation is required, however vednor stated that 10% head rise is for offered curve on proposal and on test stand tolerances mentioned on API (-5%) may lead to 5% head rise. I want to know is this claim acceptable acc. to API 610 or not?
Hi,
i would be grateful if you can help meon below case:
According to API 610, for parallel operation 10% head rise to shutoff shall be considered. We have ordered a pump last year which showed smoothed curve with exactly 10% head rise from rated point to shutoff. However, one week ago on...
