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Mike T., Swampeast MO
Mike T., Swampeast MO Member Posts: 6,928
in THE MAIN WALL
Who made:

Monoflow tee. Thin metal tag attached.

Tag reads in part:

"Downfeed"

Mono flo (logo inscribed between "Mono" and "flo". Logo in a roughly four-part circle. B&G???

Cannot make out bottom line.

They're all 1 1/2" x 3/4"

Are these unusual?

Comments

  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    sounds like....

    B&G to me....kpc

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  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    Any suggestion for flow specs?

    These are black iron. Why the "Downfeed" notation on the tag?

    Current B&G monoflow tees say they can be used in any orientation.

    Definitely a downfeed system with standing iron. Commercial downtown type building. 545 sq.ft. EDR of radiation current, likely at least 700 original.

    2,500 sq.ft. building. Owner tells me that "pumps don't last long". Aquastat at 175F and it did fire to that temp. By feel, delta-t at end of firing might have been 20F.

    Owner removed two rads by cutting off the downfeed pipes, threading and capping. Suggested that he should have made connections between the feeds instead of just capping. Is that correct?
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    Really want to compute proper flow for this building.

    Consider as open space.

    One long wall a party wall. Other long wall faces alley. Narrow front all glass. Back all brick.

    Single monoflow zone. "Hot" side against the alley. No rads at front or back.

    Brought some digital thermometers but they hit their max when measuring supply temps--FAR from my Vitodens where temps are always low...

    Space temp in the time I've been here (hour and a half) maxed at 72.7 and is now 69.5. Boiler has not fired again. Building is NOT in recovery.
  • Glenn Harrison_2
    Glenn Harrison_2 Member Posts: 845
    From the B&G website

    I know this is for their current line of copper monoflo tee's, but at least it gives you an idea of what the resistance thru the various tee's is.

    By the way, I will almost guarantee those are B&G monoflo tee's, and they are very common in older systems here in the Chicago area, but since they are made here in Chicago that should be no surprise.

    Hope it helps.

    http://fhaspapp.ittind.com/literature/files/602.pdf

    Found this chart too after I first posted.

    http://fhaspapp.ittind.com/literature/files/699.pdf
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    Thanks Glenn!
  • Uni R_2
    Uni R_2 Member Posts: 589
    Careful!

    Those flow specs are only applicable if the branch is closed. It's really meaningless. There is minimal loss with a Monoflo as it feeds the branch. It is a matter of velocity, not brute strength (i.e. head) unless the branch is closed of course.
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