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Bell & Gossett circulator leaking

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These pictures are of a circulator in a residential system with radiant tubing in the ceiling. There is a steady drip coming out of a hole at the bottom of the bearing assembly. I'm thinking there's a leak in the seal where the impeller shaft goes through the bearing assembly. Does anyone have any experience with this?

This is a HV (high volume) circulator and it's double the size of a series 100 pump.





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

Comments

  • HVACNUT
    HVACNUT Member Posts: 5,890
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    Yup. That's a leaking bearing assembly.
    Alan (California Radiant) Forbes
  • Leonard
    Leonard Member Posts: 903
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    I tried to buy only the bearing assembly at a supply house once, they only sold whole pump.

    Problem is you don't know if shaft is scored also. On cars you usually don't see damage to only one surface.
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,568
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    That's a mechanical-seal leak. Have you tried supplyhouse.com?
    Retired and loving it.
  • hot_rod
    hot_rod Member Posts: 22,480
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    I think CalHydro is the rep out there,I'll bet they have a seal kit on the shelf at a supplier near you?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Alan (California Radiant) Forbes
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    They are my go-to supplier for B & G and got a price for a replacement circulator. I didn't even ask for a seal kit; I no longer have the temperament.

    And as Leonard said, "Problem is you don't know if shaft is scored also. ".
    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