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Thread: Dynaflow Rebuild and Lube?

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  1. #1
    Join Date
    Mar 2013
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    Oregon
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    Dynaflow Rebuild and Lube?

    In the process of testing my new Q-Loader setup last night, the piston o-ring in my Dynaflow reg decides to crumble.... and then an on/off o-ring does the same. So I pull out my still factory sealed Centerflag rebuild kit... only to find that all of the urethane o-rings have aged to the point that they crumble when I try to install them.

    I found the o-ring kit on oringmonkey.com but it looks like they are using Buna-n o-rings instead of urethane.

    My concern is that the buna o-rings won't hold up as well in the dynamic seal areas in the reg.

    Does anyone offer a rebuild kit that includes the proper urethane o-rings?

    Alternatively, does anyone have a listing of the o-ring sizes in the Dynaflow? Then I can just order the proper orings from Mcmaster.

    Also, what lube should I use in this thing? I found a pbnation thread while googling, that said centerflag used white lithium grease... can someone confirm this?

    I'm not sure if it makes a difference or not, but my reg is the most recent generation of Dynaflow (the one with the removable rail)

  2. #2
    Join Date
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    #1 Buck Adams fan
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    I have a list of the sizes. Hit me up later tonight or tomorrow to remind me to post them.

    "I'm not happy unless you're not happy"

  3. #3
    Join Date
    Mar 2013
    Location
    Oregon
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    216
    Quote Originally Posted by BigEvil View Post
    I have a list of the sizes. Hit me up later tonight or tomorrow to remind me to post them.
    That would be great! I'll send you a pm this evening.

  4. #4
    Actually I need the specs too. My on/off on my Hyperflow 201 is not sealing anymore.
    "Accuracy by aiming."


    Definitely not on the A-Team.

  5. #5
    Join Date
    Mar 2013
    Location
    Oregon
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    216
    Just a side note, the o-ring off a RT regulator piston goes right onto the Dynaflow piston and works really good.

    I just put 200 rounds through my mag with the Dynaflow running an Automag o-ring.

    Seems to work well... +/- 4fps over the chrono.

  6. #6
    Join Date
    Feb 2005
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    #1 Buck Adams fan
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    Here it is...


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