Is this cavitation noise?

Babu Posted By Babu, Apr 19, 2017 at 3:13 AM

  1. Babu

    Babu
    Member 2.
    NULL
    

    Feb 17, 2015
    5
    0
    Loc:
    Rochester
    I recently drained and refilled the boiler with 400 gallons of tap water and Chemworld Wood Boiler anticorrosion chemical. I had to weld some leaks on it due to firebox acid corrosion.

    I have a Taco 007 cast iron pump. I started the pump with cold water and everything quieted down after purging air and securing the pump for vibration. I added 2 quarts of Hercules boiler Liquid Stop Leak to 400 gallons of boiler water. I shut off the valves and pump in the middle of adding it. I then heated it up to 180 degrees and opened the valves and turned back on the pump. There is a drip leg coming out of the boiler to help keep particles from entering the pump.

    The pump is now making a strange noise. What is this noise?


    Thank You.
     
  2. TCaldwell

    TCaldwell
    Minister of Fire 2.
    NULL
    

    Oct 26, 2007
    917
    93
    Loc:
    860-868-9014 h 203 948 0864 c nw corner ct.
    Let the temp go down again before turning the circ on again , see if it still makes the noise, sounds more abrasive in nature. The cavitation I've heard sounds more like a muted popping sound. Do you have another circ you could try?
     
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  3. Fred61

    Fred61
    Minister of Fire 2.
    NULL
    

    Nov 26, 2008
    2,347
    457
    Loc:
    Southeastern Vt.
    Sounds like a dry circ. Are you sure you have your isolation valves open?

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  4. lotawood

    lotawood
    Member 2.
    NULL
    

    Dec 11, 2011
    73
    2
    Loc:
    montana
    Can you isolate the pump and open it up to look at the impeller?

    It sounds like a piece of something is stuck in there to me. Stop leak particles?

    If you have isolation valves, sometimes pulsing them closed, then open might sent a slug of water to flush out something, with little time invested.
     

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