Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
(OP)
I'm replacing an old high pressure water pumping system. The current system uses two identical pumps (one main and one backup). The current pump specs:
Capacity (GPM): 60
Head (ft): 2370
Speed (RPM): 4380
Power: 40 HP
P.F.: 36%
Load eff: 92%
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Is that power draw standard for the capacity and head? I'm trying to figure out how our current pumps compare to new pumps.
Thanks
Capacity (GPM): 60
Head (ft): 2370
Speed (RPM): 4380
Power: 40 HP
P.F.: 36%
Load eff: 92%
==================================
Is that power draw standard for the capacity and head? I'm trying to figure out how our current pumps compare to new pumps.
Thanks





RE: Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
Your HP formula would be HP = (GPM*TDH*S.G.) / (3960*Eff.)
What style of pumps do you have now?
RE: Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
We have RotoJet centrifugal pumps.
RE: Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
RE: Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
On the info provided What is PF? What is efficiency of your pump at that duty point?
Do you have the pump details, i.e. pump curve. If not you could well get them from the vendor = they have records going back a long way. Is that USGPM?
4380 rpm seems quite high. Is it on the end of a VFD motor or have you some sort of gearbox as 60htz 2 pole motors only run at about 3600 rpm. Gearboxes which will have their own efficiency impact.
The equations provided above are for shaft power required by the pump. Your motor will need more electrical power which is divided that figure by the efficiency of the motor (for that size typically 90 to 95%). The efficiency referred to by dubmac is the efficiency of your pump at that duty point.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
And yes, I'm curious if ~20 year old pumps can be competitive with today's pumps in all areas. Has pumping technology progressed significantly in that time?
RE: Recommendations for a high pressure pump- min 60 GPM and 2700 head-ft
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way