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Noisy circulator

MattinIndy
MattinIndy Member Posts: 12
in Gas Heating

Got a question about noise from one of my tech's. He initially thought it was the pump, but after installing a new pump the noise is still present. I have included a picture of the pump in question. One thing my tech noticed is that after he installed the new pump he could spin the pump around. Basically, the flanges are able to rotate on the ball valves. I've never installed these exact flanges myself, but that seems strange to me and I'm wondering if that has something to do with the noise.

Anybody ever run into this before with these flange/ball valve sets?

pump.jpg

Comments

  • Ironman
    Ironman Member Posts: 7,539

    The noise has nothing to do with the flanges. We’ve put hundreds of them in with no issues.

    You need to see if the pump is cavitating and if there’s a restriction causing it.

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • hot_rod
    hot_rod Member Posts: 23,257

    what type of noise? A gurgling noise could indicate it needs to be purged again

    What is the pressure on the boiler gauge? Increasing the pressure a few psi can sometimes help

    A squealing noise could be debris in the pump body

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Grallert
    Grallert Member Posts: 766

    I was going to write that those flanges should not rotate but after a closer look they are designed to do that only to position the circulator. Once tight they should not move. I'm curious as to what kind of noise he's hearing.

    Miss Hall's School service mechanic, greenhouse manager,teacher and dog walker
  • Intplm.
    Intplm. Member Posts: 2,176

    Post the noise here and let us have a listen ( 👂️ )

  • MattinIndy
    MattinIndy Member Posts: 12

    Unfortunately, I don't have any other info from the gentleman that looked at this issue. I am going with him Monday morning first thing. I'll report back my findings.

  • bjohnhy
    bjohnhy Member Posts: 7

    Those look like the Dielectric isolation valves. They are fairly easy to spin when water tight. I question if the rubber gasket (or plastic isolation washer) has fractured and is flopping around with flow.

    Is there a check valve, was the old one used with the new pump?

    Let us know what you find.

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