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  1. Muleman

    Off the shelf 20 hp gear pump/driver

    Sorry, I guess I was expecting you to read my mind. We're pumping water, need at least 40 gpm at 150 psig.
  2. Muleman

    Off the shelf 20 hp gear pump/driver

    Can anyone give me an idea where one would find pump/driver such as the above?
  3. Muleman

    1/5-1/2 hp perm magnet motor

    OK, Uncle. Based on the cost estimates I have, the material savings are in the range of $100-$200 and we'll eat more than that up in electrician charges, but you've convinced me that we should at least try it. I really like the idea of 3 phase motors, and if the AC driver is somewhat enclosed...
  4. Muleman

    Relative permeabiltiy curve

    Notwithstanding the fact that kr data from one sample does not a model make I'll leave you with the following: I'm no kr expert, but I have built/matched many models over the years and intuitively I'd say don't do it. My rationale comes from considering a waterflood for the fractured sample...
  5. Muleman

    1/5-1/2 hp perm magnet motor

    I should have been more descriptive. Preference is for a brushless motor. We can easily hook the panels/batteries to deliver 12/24/48 etc. so we wouldn't need a converter.
  6. Muleman

    1/5-1/2 hp perm magnet motor

    The magic of low DC voltage is that we don't have to be electricians to work on it. We are testing an inverter/AC motor, and since the days I was building them, they are very good and seem to be efficient, but for the cost of the inverter, I can buy a pump and motor. The DC motor we're testing...
  7. Muleman

    1/5-1/2 hp perm magnet motor

    We are using 24VDC solar power to pump 50/50 glycol-water at remote well locations. We could increase the source voltage to 48V but I'm trying to stay away from anything higher and do not want to go to AC inverters. The calc hp requirements vary from 1/5 to 1/2 hp. They run in a fairly harsh...
  8. Muleman

    PSV & weep holes

    11.18.6 (Relief Valve Venting) of ISO 13631 says "If specified, atmospheric vents shall have weep holes at the lowest point near the relief valve." Thus, it seems that the purchaser has the option. It's been my experience that weep holes can rarely be located such that water/ice etc. can be...
  9. Muleman

    Hi Press Shut Down Valve

    One thing I didn't mention, we have no power, all controls have to be pneumatic.
  10. Muleman

    High efficiency pump

    Average flow rate is 6 gpm with a discharge pressure of 15 psig. I was thinking along the same lines as you describe about the smaller cent pmps, that's why I quit looking. I've looked at companies like Gould and they show pump curves with efficiencies much better than I've measured, but the...
  11. Muleman

    High efficiency pump

    I'm no pump guru so I assumed for low flow rates, cent pmps are usually less efficient. I've spent quite a bit of time surfing the web and I see very few mfg of small cent pmps that give much performance data--other than end points. Those that did give data showed performance similar to the...
  12. Muleman

    Hi Press Shut Down Valve

    We have several hundred pressure vessels that have pneumatic fail close inlet valves that shut in at high pressure. We'd like to add another level of protection so that if the current sensor doesn't react, an independent sensor would see the pressure, close the supply and bleed the diaphragm...
  13. Muleman

    High efficiency pump

    I need to pump 3-6 gpm of 50/50 glycol and water at 15-20 psig for heat tracing production lines. There is no electrical power, so I'm trying to do it with a 24 V solar system and as such efficiency is a primary concern. I inherited a pilot test with solar pannels, batteries, inverter, AC motor...

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