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balance valves

PDB2
PDB2 Member Posts: 26
in Radiant Heating
In my series loop baseboard system (2 loops), are  manual balance valves a good idea ? Where should they be located ?  The original positions were right at the discharge of each pump.

Comments

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,206
    Balancing Valves

    One of your loops may have been a lot longer than the other and the shorter loop got all the flow.  The shorter loop valve can be tuned down to encourage flow to the longer, more restrictive loop.



    Not a bad idea to cover your bases when installing the system, but normally I don't see them.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Greg Maxwell
    Greg Maxwell Member Posts: 212
    Balancing Valves

    It is not necessary if you have each loop on its own zone. If it a split loop, it may be a good idea as Alan said.
  • Sol Hydronics
    Sol Hydronics Member Posts: 41
    ball valves

    Will ball valves be ok to control flow .
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    You should use

    a globe valve (needle valve) for balancing.  Not a gate valve, and not a ball valve.  Ball valves should be for shut-off only.  Look inside one and see how far you have to turn (almost all the way) to get a reduction.

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