low NPSH oil pump
low NPSH oil pump
(OP)
hi, i´m engineering a pump for drainage of crude storage tank, tha operating conditions are:
1. NPSHa 1 ft
2. flow: 150 gpm
3. discharge pressure: 40 psig
4. crude viscosity: 2000 cP
wich kind of pump its the best for this aplication.
Thanks
1. NPSHa 1 ft
2. flow: 150 gpm
3. discharge pressure: 40 psig
4. crude viscosity: 2000 cP
wich kind of pump its the best for this aplication.
Thanks





RE: low NPSH oil pump
I've a question regarding NPSHA on an atmospheric tank. With a viscosity of 2000 cP, it seems that the vapor pressure of the hydrocarbon would be quite low, resulting in a value much higher than 1 ft. Can you, please, explain how did you estimate this low NPSHA?
RE: low NPSH oil pump
Johnny Pellin
RE: low NPSH oil pump
a vertical multistage pump with deep sump may work for you
however since the viscosity is on the higher side either some reliable agitating/mixing devices could prove useful in having better fluidity maintained from tank or
some tank suction heater similar to those employed sometimes for highly viscous lube base oil stock storage tanks(subject to safe heating media availability, we used Low Pressure condensing steam at our previous employer lube storage tank yard) may be another viscosity lowering support option!
Best Regards
Qalander(Chem)