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Thread: HP requirements for 22 & 28 GPM pumps?

  1. 01-23-2010, 07:44 AM #1
    nparch726
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    HP requirements for 22 & 28 GPM pumps?

    I wanna say this info used to be on Northern Tool, but I sure can't find it now. Anyway, how much engine HP is required for a 22 and/or 28 GPM two-stage pump?
    Stihl MS310 - 20"
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  2. 01-23-2010, 07:49 AM #2
    ray benson
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    22gpm 2 stage - 12 hp
    28gpm 2 stage - 16 hp
    http://www.surpluscenter.com/sort.as...c&keyword=HP2S
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  3. 01-23-2010, 07:56 AM #3
    wkpoor
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    To run the formula you need to know the pressure. And on 2 stage pumps you would need to run it for the low and the high. With all that said I think most get by fine with a 16 on the 22 and an 18 on a 28.
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  4. 01-23-2010, 08:40 AM #4
    nparch726
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    Thanks a lot guys, I've got a good 18 HP Kohler sitting here just begging to be used and I was thinking it would be enough power, just wanted to make sure.

    Now if I could only find a good deal on a pump!!
    Stihl MS310 - 20"
    Stihl MS210 - 16"
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    '04 F-350
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  5. 01-23-2010, 08:42 AM #5
    triptester
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    Here is some info on haldex 2-stage pumps and hp. required. The hp. required depends on max pressure x gpm for each stage.
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  6. 01-23-2010, 03:51 PM #6
    bayard
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    11 hp honda

    i have 11 hp honda with a 22 gal pump.cyl is 4.5 diam.it is very fast.k
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  7. 01-24-2010, 07:18 AM #7
    rdbrumfield
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    with that much hp you most likely don't need a 2 stage pump.

    I am running a 32 gal pump with a 24hp honda 5in cyl. no problems. 7 sec cycle time. I can't run it at top rpm or I get too much heat. It will shear anything I put in it.
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  8. 01-24-2010, 08:31 AM #8
    mga
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    i use a 22gpm pump, and 12 or 18 hp engines, 5 x 24 x 2" cylinder.

    (i've switched engines a couple of times)
    always on.......slightly off
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  9. 01-24-2010, 10:28 AM #9
    triptester
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    If you are able to run a 32 gpm single stage pump with 24hp. without reduced pressure it is probably because the pump is well worn. That is also probably the cause of over heating at high rpms.
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  10. 01-24-2010, 12:18 PM #10
    wkpoor
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    Quote Originally Posted by triptester View Post
    If you are able to run a 32 gpm single stage pump with 24hp. without reduced pressure it is probably because the pump is well worn. That is also probably the cause of over heating at high rpms.
    I agree totally. I ran my unit single stage 22gpm on my Allis CA with about 24hp PTO and at 2000lb pressure it would make er snort pretty good. 32gpm would have stopped er cold.
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  11. 01-24-2010, 07:09 PM #11
    rdbrumfield
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    Fellows, the pump is brandnew as is the honda. So far things work well and it does take a while to get the oil warm. Don't have to run the engine at high idle to get it done. I did shear a key so I backed off the pressure a bit. Still splits what I put in it so I am happy.
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  12. 01-24-2010, 10:11 PM #12
    triptester
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    I see a few things must be clarified when determining hp. required to operate a hydraulic pump.

    A combination of three things determine horsepower needed to operate, gpm , psi , and rpms. A pump rated at 20 gpms at 3600 rpms will produce only 10 gpm at 1800 rpms and will require less horsepower to operate. A pump rated at 3000 psi operated at 1500 psi will require half the horsepower.
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