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pump dummy

t4t4 Member Posts: 6
whats a velocity noise

also whats a harmonic noise

any body ever have either with the compact perminantly lubricated type?


  • pipekingpipeking Member Posts: 252
    pump niose

     volocity niose is from fast moving water, and harmonic noise is from the pump imperfections.
  • t4t4 Member Posts: 6
    pump imperfections

    can you elaborate what you by pump imperfections? we are talking new pumps
  • GordyGordy Member Posts: 6,445
    edited February 2013
    Pump noise

    Boils down to friction in all aspects.

    With velocity noise it's the friction of the fluid in the pipe. The higher the velocity the greater the friction. To reduce this you either increase pipe size, or decrease pump speed depending on the parameters you are trying to achieve.

    Circulator harmonics is still about friction, and pump / piping solation. Any pump has friction in its moving parts, and the fluid it is moving to some degree. The larger the pump the more harmonics reverberating through the pipes. Isolation of piping from the structure will help.

    It should be noted there are different circulator designs. Wet rotor, three piece, ECM .

    Most small circus for residential you can hardly tell if they are on.
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