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Last Post 01 May 2020 01:55 PM by  William Hall
trash pumps on dredge.
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Randy Smith
Greenhorn
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Posts:7



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29 Apr 2020 04:41 PM
    i have a 3 inch xtreme trash pump 7 hp. walmart special.
    it puts out around 18000 gph on 3 inch. Atleast what it says.
    I was running sized down to 2 inch.
    But i bought the piglet flare and now run it as 1.5 with a 2 inch intake needless to say bare idle is almost to much.
    i dont know the psi guessing around 50 or 60 sized down like that.
    but can blow water 4 ft above the box if crank it up.
    I hate to do away with the pump it starts first pull and self primes most the time. but is heavy.
    So was looking for info on pressure needed for suction dredge. i cant find no numbers says this much psi for this size dredge.
    Ive heard of trash pumps being used on dredges and dont see no use buying a high dollar motor for a dredge if this one can put out the water needed.
    If use a 3 inch intake might have enough for something.

    any advice is appreciated.
    William Hall
    Buzzard
    Buzzard
    Posts:576



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    29 Apr 2020 07:15 PM
    Randy,

    My advise, DONT do it
    However, I know your going to try it anyway
    It's not the GPM that matters as much as PSI to force water through the jet log (if that is what your using)
    Injector nozzle might work, keep hoses short and straight
    Been there done that, You might get enough to dredge, not enough PSI to make the jet log work right, plug ups
    Save yourself the time lost, headaches, pissed off.
    Give it a try, let us know how it goes

    Bill
    So Much River So Little Time...Get Out There
    Randy Smith
    Greenhorn
    Greenhorn
    Posts:7



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    29 Apr 2020 07:44 PM
    Thanks for the advice. i will listen and bite the bullet on the pump till find something to use it on.

    Any suggestion on where to get info on psi needed per inch and jet sizes,
    William Hall
    Buzzard
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    Posts:576



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    30 Apr 2020 07:28 PM
    The jet size will be determined by you as to the size of the suction hose 2" 3" 4" what ever size
    The eductor on the jet will determine the pressure hose size, our 4" had a 2" off a P180 pump if memory serves
    I remember not tightening the hose clamp one time, everybody got wet LOL

    Poke around on Keene's page or Prolines page
    that should tell you HP, pump size, probably wont give PSI
    Call your local mining shop, they should know
    Keenes page shows the 195 pump for 5hp or better, 180 head, convert that to PSI, 310 GPM your in
    The trash pumps cant generate the PSI needed for a jet, the centrifugal type pumps generate much higher PSI due to their close machine tolerances

    Have fun,
    Bill
    So Much River So Little Time...Get Out There
    Randy Smith
    Greenhorn
    Greenhorn
    Posts:7



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    30 Apr 2020 08:35 PM
    thank you. im still trying to learn alot of this stuff, im no pro by far. But i went from sluice to high banker, now try moving on up the list.
    William Hall
    Buzzard
    Buzzard
    Posts:576



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    01 May 2020 01:55 PM
    Randy,

    Yep lots to learn, dont worry you will get there
    Been mining nearly 30 years, still learning things
    Yes, we did highbanking, still sluice, dredged a number of years, lots of fun and HARD work
    Right of passage I guess

    Bill
    So Much River So Little Time...Get Out There
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