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  1. TheHandModel

    Magnetic pumps for unloading trucks

    Mag-drives can be used for unloading but there are some considerations for this. 1. If you're operating fixed speed, I'd recommend using a power monitoring device. amp(current) monitors might not get the job done depending on how the motor is sized. Emotron makes a M20 unit that measures...
  2. TheHandModel

    Water pump for fire hose

    If he has a basin with water is there a reason that a submersible wouldn't be a good idea. They can be outfitted with some type of suction screen to limit debris going in(whether it starves the pump eventually is something he should test out) Also agree that main electric supply should not be...
  3. TheHandModel

    Power vs Current Monitoring

    I'm definitely not an electrical guy but my understanding is that below 50% of nameplate power, there is very little difference in current. Even if reading properly, it's very hard to pick any setpoint that suitably protects without the risk of nuisance trips(which can lead to the operator...
  4. TheHandModel

    Magnetic Drive Pump Leak at Containment Shell (nitric acid)

    @jsasada If nitric acid is leaking through the containment shell normally, scratches seem like a secondary issue. Are there any signs of damage on the inside of the containment shell that would indicate a possible leakpath to the composite material? 40% nitric is below the fuming...
  5. TheHandModel

    Magnetic Drive Pump Leak at Containment Shell (nitric acid)

    Are there two separate containment shells? If so it's hard to see the exact scratch in the first picture. There definitely is material accumulating around the outer magnet. Most adapter brackets will have multiple threaded ports to tighten the outer magnet to the motor shaft as well as to...
  6. TheHandModel

    Cavitation in canned pump/ sealless pump

    George, there is no such thing as a clean service. There is only dirty and less dirty. There will always be little surprises that don't quite make it into the data sheet. Every centrifugal pump(sealed, mag-drive, canned motor) has to address 3 issues in solids applications; Clotting the...
  7. TheHandModel

    RE: Magnetic Drive Pump Leak at Containment Shell

    thread407-490736 @jsasada : Did you ever finally figure out the issue with this. I didn't see anyone else comment but something does not look quite right with the picture of the front rotating wear ring. I know that the SiC finish can vary but that axial face looks like it was lapped to a...
  8. TheHandModel

    ANSI Mag Drive Maintenance Expectations

    There are closed coupled mag-drive configurations that don't have a bearing frame. If they eliminate the bearing frame then they eliminate shaft alignment as well as bearing wear and oil related items(checking/maintaining level, sampling/testing, and oil changes). Most designs I have seen also...

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