Loking fo a low flow/low NPSH Pump
Loking fo a low flow/low NPSH Pump
(OP)
Folks, I am looking for suitable type, vednor or manufacturuer for a pump of the following specs. Any help appreciated
> Capacity 17 GPM
> Normal Suction Pressure 0-3 psig
> Discharge Pressure 20-25 psig
> Pump suction and casing must be rated for 100 psig
> Temperature rating for pump -20 F to 100 F
> NPSHa 0.56 ft
> Pumping Fluid is hydrocarbon and water, SG 0.75-1.0 and viscosity 0.82
> cP
> 2" outlet and inlet, 300# rated flanges
> Pneumatic (120 PSIG utility air ) or Electrical (480 V, 3 phase , 60 Hz, Induction type motor)
> Marine Environment (Offshore)
> Class 1 Div 2
> MUST be API 610, 7674, 675, 676 compliant
> Capacity 17 GPM
> Normal Suction Pressure 0-3 psig
> Discharge Pressure 20-25 psig
> Pump suction and casing must be rated for 100 psig
> Temperature rating for pump -20 F to 100 F
> NPSHa 0.56 ft
> Pumping Fluid is hydrocarbon and water, SG 0.75-1.0 and viscosity 0.82
> cP
> 2" outlet and inlet, 300# rated flanges
> Pneumatic (120 PSIG utility air ) or Electrical (480 V, 3 phase , 60 Hz, Induction type motor)
> Marine Environment (Offshore)
> Class 1 Div 2
> MUST be API 610, 7674, 675, 676 compliant





RE: Loking fo a low flow/low NPSH Pump
RE: Loking fo a low flow/low NPSH Pump
Try an air operated diaphragm pump...
They are variable speed, can operate under all kinds of suction conditions and can handle the modest flow and pressures that you you state.
By the may... they consume a lot of compressed air if operated continuously.
-MJC
RE: Loking fo a low flow/low NPSH Pump
A gear pump like vikingpump.com may be a fit (and a little overkill considering your viscosity). Larger gear pumps that meet your spec's (API, Flanged, etc...) can be slowed down with gear reducers to deal with low NPSHa.
A half a foot NPSH available is really low. With a minimum 0 psig suction and minimum 0.75 SG I do not see how you arrive at 0.56 ft NPSHa.
RE: Loking fo a low flow/low NPSH Pump
RE: Loking fo a low flow/low NPSH Pump
Roth has a nice product, but not API compliant.
RE: Loking fo a low flow/low NPSH Pump
RE: Loking fo a low flow/low NPSH Pump
Roth turbine pump NPSHr is 0.5 ft, that gives a 0.06 ft margin. I would like to see vendor experiences with that.
RE: Loking fo a low flow/low NPSH Pump
RE: Loking fo a low flow/low NPSH Pump
Canned motor can be trouble make if misapplied; a champ is the right application.
RE: Loking fo a low flow/low NPSH Pump
I've always stayed clear of progressive cavity as I've heard the liners can sometimes come loose in big chunks. Not good in the food industry. If you have a filter down stream, though, it may work.
RE: Loking fo a low flow/low NPSH Pump
RE: Loking fo a low flow/low NPSH Pump
Best Regards
Qalander(Chem)
RE: Loking fo a low flow/low NPSH Pump
I suggest you look up Roth Pump Company on the Net. They offer a line of Regenerative Turbine pumps that they claim work with 6" NPSH.
RE: Loking fo a low flow/low NPSH Pump
2) This oily water ( rich water/ & only time by time has some oil, no need API pump Just use ANSI pump much cheaper/low maintenance, and safe enough to operate in utility/safe zone.