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Recent content by Jackofalltrades2

  1. Jackofalltrades2

    Back Pressure Regulating Relief Valve...

    This might be a little more complicated than you want to try, but instead of regulating the pressure, try regulating the flow. When you open a feed solenoid, close a venting solenoid. Keep relief in system to prevent overpressure only and set above the 200 PSI threshold you need. if OK. Valve...
  2. Jackofalltrades2

    Help Identifing the Cause of this Noise

    At that speed the pump is not going to be very quiet. It will make a high pitched whining noise. If oils is flowing across the relief all the time the relief will also make noise. The RV1 relief is a Modular controls type valve that is a direct acting poppet relief, These make a lot of noise...
  3. Jackofalltrades2

    Paddle wheel help

    I have built several paddle boats but they were much larger. They were actually passenger cruise boats, one for a river, one for the ocean. 60ft, and 100 ft craft. First of all, the paddles were about 90% efficient. The hull speed was about 90% of the paddle speed up to the hull speed limit of...
  4. Jackofalltrades2

    Paddle wheel torque calculations

    No experiance with either Tom Nelson Application Engineer (CFPS) CATCO Parts and Service St Paul,MN
  5. Jackofalltrades2

    Low-pressure Hydraulic Motor

    Not many motors will overcome internal mechanical resistance with 20 PSI most take 200 PSI or so to start with no load. I am thinking an electric motor with a gear reduction might work better. TN Tom Nelson Application Engineer (CFPS) CATCO Parts and Service St Paul,MN
  6. Jackofalltrades2

    Paddle wheel torque calculations

    Bert, Think about your last statement! You need to know how much HP it will take to drive the pontoons at 10 MPH, not the boards. Adding a gear reduction increases the torque output and reduces the speed output. The net HP remains the same. If you start with a motor with the ability to...
  7. Jackofalltrades2

    Paddle wheel torque calculations

    Bert, The last paddlewheels I built were 100ft long and weighed about 50,000lbs, for shallow river operations. Here is what I learned. The paddles were about 90% efficient. The rotational speed of the paddles only slipped about 10%. But ours were 80% of the width of the boat. Your motors...
  8. Jackofalltrades2

    Regenerative hydraulic circuit

    Regen circuits by nature convert a double acting cylinder into a single acting cylinder when extending and use the rod area only as a force area, not the piston area. I think you are looking for some type of flow divider circuit to keep the cylinders in parrallel when extending or retracting...
  9. Jackofalltrades2

    Sealing NPT threads, tape v. anaerobics ?

    I have used all of these. The problem with an anaerobic sealant is that the pieces to be sealed have to be free of oil. This makes it difficult to use after an a fitting has been ran. Anaerobic sealants are the only way to go when sealing steel into Aluminum bodies. I have never seen tape or...
  10. Jackofalltrades2

    open center/ closed center

    The Husco 5000 valve should be able to be converted to an open center valve assembly by changing or modifying the power beyond adapter in the outlet cover. Any local hydraulic shop should be able to help you identify the solution if you take the valve to them and show them. Always put the...
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