Hydraulic Spool Valves

Discussion in 'Hybrid' started by Mark Emaus, Sep 20, 2010.

  1. Mark Emaus
    Joined: Jan 2009
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    Location: Georgia

    Mark Emaus Junior Member

    Well here is my problem.

    Picture this...IC engine turning a hyd. pump....which goes to a spool valve...which goes to a hyd motor...and the extra fluid not used goes back to the reservor...the motor is reversible. Ok now an after thought..........we add a hyd cylinder to the system. I was going to put a flow splitter on the line running from the hyd. pump before it reached the first spool valve and that line would go to the second spool valve and run the cylinder. But after thinking about for a while, I am wondering if I need a flow splitter....here is what I am thinking. What if... instead of the splitter, I go with the orginal design....and the line goes past the first spool valve back to the reservor, I run the line off of that to the second spool valve and then continue the line to the reservor? Is that possible?

    thanks

    Mark
     
  2. Bglad
    Joined: May 2010
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    Location: Jacksonville, Florida

    Bglad Senior Member

    I set up hydraulic deep drop reels that way. As long as they are in series (what you are describing) they should work fine if they have smiliar demands. When I set up trap haulers on lobster/crabbers in the keys we used to use a flow control valve on the pressure washer because it was an on/off thing and full flow would spin it too fast. You might have to add something like that if the flow rate were too high for one or the other to allow finer control of the device.
     
  3. Mark Emaus
    Joined: Jan 2009
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    Location: Georgia

    Mark Emaus Junior Member

    Awesome B...Thank you for the advise.
    The flow rates are way different. 40 gmp on the motor and maybe 10 gpm, (at most) for the cylinder. I guess you would run the line as first spool valve, flow control valve(set at what ever gpm the cylinder needs) then the second spool valve?

    Mark
     
  4. Bglad
    Joined: May 2010
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    Location: Jacksonville, Florida

    Bglad Senior Member

    If the spool valves are the same size you shouldn't need a flow control. I was thinking the flow control valve only if you had trouble controlling the cylinder. Your descripton sounds right if you need one.
     
  5. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Can you use a multiple spool valve? It will solve the problem.
     
  6. wardd
    Joined: Apr 2009
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    Location: usa

    wardd Senior Member

    spool valves are an open center system and are most always in series

    a splitter would be problematic
     

  7. Mark Emaus
    Joined: Jan 2009
    Posts: 86
    Likes: 2, Points: 0, Legacy Rep: 20
    Location: Georgia

    Mark Emaus Junior Member

    I should have bought a double spool valve in thef irst place. But I have two different valves for different task. I am learning the expensive way. lol
     
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