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  1. #1
    Join Date
    Jun 2011
    Location
    Maryland
    Posts
    13
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    Armstrong PN 20 balancing question

    I have a building full of the Armstrong PN 20 balancing valves, and I'm stumped as to what the hex head plug is used for on the side of the valve. Any ideas?
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  2. #2
    Join Date
    Aug 2019
    Location
    Central Florida
    Posts
    91
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    I have been out of the field for a while and have never seen this particular valve . I can find out on Monday from my sources. Let me know if you need me to do that .

  3. #3
    Join Date
    Feb 2016
    Location
    Louisburg Kansas
    Posts
    3,533
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    I think the valves are DN20 (3/4") not PN20. I have been told 2 or 3 things about the plug but didn't know what to believe. I'll be watching brad to see what you find out. The most logical thing I was told is that the plug is access to one of the seat seals. I never pulled one to find out.
    No man can be both ignorant and free.
    Thomas Jefferson

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