best pump for suction lift
best pump for suction lift
(OP)
I was wondering if any body could lead me to a better understanding of suction lift. I've been able to learn a few concepts from the Cameron Hydraulic Data book, but from what I've seen, the use of a set of centrifugal pumps in parallel we have at the plant is not ideal for this kind of application. Any leads?





RE: best pump for suction lift
suction lift or suction head is the amount of height the pump has to overcome to get the liquid in the pump.
it isn't an application as such
running two centrifugal pumps parallel can cause some problem, one pump choking the other one
RE: best pump for suction lift
There is nothing wrong with multiple pumps on suction lift on a common inlet system.
However, saying that there are important considerations to take into account.
You would treat each pump as an individual unit for NPSHr/a requirements but the inlet pipe must be considered for the sum of the installed units as far as head loss and the effect on the NPSHa of each unit.
Isolation of each pump from the other is necessary in the event that one or more pump/s is/are not operating so that the inlet systen is not open to any non operating pump/s, this means a NRV of some type on either on the inlet or the discharge of each pump.
You need to carefully review the effect of the inlet pipework on each of the units so as not to introduce inlet problems, ie, pre-rotation, flow favouring any particular pump on the system under all operating conditions, air trapped in any dead ends of the pipework etc.
RE: best pump for suction lift
RE: best pump for suction lift
RE: best pump for suction lift
RE: best pump for suction lift
RE: best pump for suction lift
Are the pumps surface mounted horizontal, with seperate or a common inlet line and seperate or common discharge line?
How many duty pumps do you want running after the upgrade 3 or 4?
Think it might be a good idea if you think thru' what you have now, what you are trying to achieve and some reasoning to your thoughts, this way people can make some informed suggestions.
RE: best pump for suction lift
Lonovane
RE: best pump for suction lift
Regards