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# HP Required to Move 1 GPM At 1000 PSI!

09/02/2015 11:30 PM

Many years ago in a hydraulic study the instructor said this I would like to have the minds of the greats group I know.

He Said 1 HP would deliver 1 GPM at 1000 PSI.

Was he full of a bull or on the point.

Tom

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#1

### Re: HP required to move 1 GPM At 1000 PSI!

09/02/2015 11:50 PM

Is GPM Gallons per minute of compressed hydraulic fluid?

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#2

### Re: HP required to move 1 GPM At 1000 PSI!

09/02/2015 11:51 PM

1 GPM of what is the question.

Viscosity, specific gravity, type of pump and more all matter.

It's possible.

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#3

### Re: HP required to move 1 GPM At 1000 PSI!

09/03/2015 12:48 AM

He was perhaps a bit conservative. Theoretically 1752 psi if it's water (IIRC; I'm too lazy to look it up or compute it right now), but his number allows for various inefficiencies that might occur.

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#4

### Re: HP required to move 1 GPM At 1000 PSI!

09/03/2015 1:31 AM

Horsepower to drive a pump @ 100% efficiency HP = GPM x PSI x 0.000583

Horsepower to drive a pump @ 85% efficiency HP = GPM x PSI x 0.000686

Rule of Thumb: 1 GPM @ 1,500 PSI = 1 HP

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#5

### Re: HP required to move 1 GPM At 1000 PSI!

09/03/2015 1:53 AM

HP = (PSI X GPM) / 1714

Plus what Lyn says!

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#6

### Re: HP Required to Move 1 GPM At 1000 PSI!

09/14/2015 5:18 AM

All you've got to do is multiply your flowrate by your pressure rise and divide by the efficiency of the pump at that operating point. I'm not going to do it for you, because that might make you lazy and we don't want that now, do we?

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