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  1. riqson

    hydraulic pump - changing GPM capacity

    thanks Ed , I am braziliam , hope my english possible to make-me understanding.. my problem : I wish have more torque in my winch (dosnt matter if with less speed ) , my HP is vickers vane 25VQ 21 gpm , drived direct in a 250 hp Mack engine (plenty power disponible) my hydraulic motor is a...
  2. riqson

    hydraulic pump - changing GPM capacity

    Hi all , assuming I switch the cartridge of my vickers VQ25 of 21 gpm to 16 gpm and keeping same RPM ... my winch HD motor will rotate slower rigth . My question: the HD motor will have more torque ? I'm sorry if it's obvious but I'am just dredge...
  3. riqson

    pump power requirement for a dredge pump

    LittleInche, thanks for reply... well we do not have any kind of instruction , we make dredges by pratice try and error... everybody here have no idea in flow rate , etc the material is heavy gravel whith big cobbles normally we use Cummins 400-480 hp in 14" and 16" dredges this dredge we are...
  4. riqson

    pump power requirement for a dredge pump

    Hi all , I am brasilian , sorry about ortografic errors... someone can help-me to determine how much HP and what RPM must be ideal for my 18" drege pump? pls take a look in anex esqueme , is a 1,1 mts x 35 cm 4 blades impeller in a pump shell 1,5 mts diametre discharge and suction pipes 17"...
  5. riqson

    gold mining commercial dredge sluicebox

    miningman, thanks for reply , I am brasiliam , sorry if ortografic erros... yes, here in Brasil and latin america in most place where brasilians work in dredges we do not use moss and expanded metal... I personally beleave moss and spanded metal is more efficient...make a few years peoples...
  6. riqson

    gold mining commercial dredge sluicebox

    can someone update me about best practice currently used today in alluvional gold mining recovery used in commercial gold mining dredges ? I am partner in a dredge in Colombia, we used sluicebox lined whith brasilian carpets (not nomad type, we used a black one like imagem anexe )without...

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