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RADIATION CONTROL VALVE

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Dick_2
Dick_2 Member Posts: 14
in THE MAIN WALL
our Warren Webster two pipe steam system radiation units(which are recessed in the wall) have a small disc with holes all around on each inlet valve stem. This disc has a small stub which stops the opening of the valve by meeting a post on the valve housing. This disc can be rotated and I just wondered if the purpose was to allow more or less steam into the radiant finned panel?

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  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,544
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    Each stop

    on that dial represents 10 square feet of radiation. It causes the valve to act like an orifice. The installer would set the valve for a value that was a bit less than the radiator's rating, thereby assuring that the trap would see nothing but condensate. These valves helped extend the life of the traps.
    Retired and loving it.
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