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Thread: Iwaki RD-series power supply questions

  1. #1
    Xtreme X.I.P.
    Join Date
    Oct 2006

    Iwaki RD-series power supply questions

    I've got a pair of Iwakis just lying around, that I sort of want to use. Now, these things add alot of heat to the loop at full 24V, so running it at a lower voltage is probably wiser. I'm not making huge ass loops, at most 4 blocks and two Monsta's (240/360) or perhaps triple PA120.3's. I do have the trusty, old, Meanwell S-150-24, but then I'm stuck with the full 24V - unless I can somehow reduce the voltage. I know I've read that people run these at 18V, but not how The 2nd option is to grab an S-150-15, which should be adequate, I guess. Any thoughts?

    PS: where does one buy these pumps these days? Someone in a local forum was wondering where he could get one.

  2. #2
    Crunch-Fu Adept
    Join Date
    Sep 2005
    Czech Rep.
    I am curious for someone wise about this to reply and help you out due to Iwaki being sort of like a Chevy V8 of water-pumps, I guess, and I'm wondering how they are nowadays. Never owned one, but back in around 2007 was planning to implement it in a loop based on experiences shared here at XS.

    Check this out:
    Last edited by Aerou; 03-16-2017 at 11:55 AM. Reason: typo
    Sometimes a good slap in the face is all you need

    Bios my arss.....
    I can fix this problem with a hardware mod....

    "Overclock till death. Overclocking is life." Hipro5

  3. #3
    Xtreme Member
    Join Date
    Jan 2004
    Around the corner
    I have an RD-30 with a S-150-24. The adjustment pot drops it down to 20.5v which was enough to save some power and heat for me.
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  4. #4
    Xtreme Addict
    Join Date
    Mar 2008
    I ran RD-30 @ ~20v with a pot off Meanwell back in the day. I wouldn't go below 15v or you are just wasting potential and modern rads can handle the little extra heat from the pump no problem.
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