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water flow

jstrocky Member Posts: 2
Can anyone tell me how to figure the GPM's thru a 3/8 copper tube at 100psi.


  • scrook_2
    scrook_2 Member Posts: 610
    100psi drop...

    or max acceptable flow through a 3/8" tube (at 100psi or other)? A 3/8" O.D. should tolerate about 1.5 GPM max long term, maybe a little more intermittantly. Pressure won't effect the max acceptable flowrate for liquids, though the resulting pressure drop may be excessive, depending on tube size, length, inlet pressure, and required outlet pressure.
  • hr
    hr Member Posts: 6,106

    at 70°F flowing at max acceptable velocity of 4fps (CDA) would flow 2 gpm. Fine for continous use. You could push 2.5 or 3 gpm intermitantly with velocity of 6fps.

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  • flange
    flange Member Posts: 153

    those are good numbers as listed, they are taking into account noise from the water velocity. you could push a little more through there, but it will be noisy.
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