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Re: [APD] Re: Bubbles? -- or - Where did the flow go?
Actually, let me rephrase to clear this up, this being the third time
someone misunderstood my problem I guess it was just clearer in my head.
The airline from my CO2 tank comes out of the needle valve, through a
check valve then down the line to the intake for the reactor (but not
_at_ the reactor). Now, I didn't drill a hole in the reactor
specifically for the airline. I had an irrigation tap in the output
line from the pump (nylon return tube). I put the airline on that
tap...so when the pump is on water is forced up the airline. There is a
check valve after the needle valve (you can see it on the left in the
reactor picture) so I wasn't nervous about it returning to the tank and
causing problems. However, it seems I won't get a regular flow when the
airline has to build pressure to go back to the pump return.
The question is/was: How can I reduce the backpressure of water on the
airline from the pump return to the CO2 tank?
My next question is, if I turn over the flow through the reactor (so it's
closer to the proper design ;-) are the bubbles really going to flow
upwards/trap? I have a 750g/hr. pump, rated at this head it flows
~500g/hr. I don't know fluid dynamics so this is a big problem! The
pump return is a 3/4" nylon tub that goes to some adapting fittings of
PVC pipe, which eventually reaches 1-1/2" PVC, so a 2x growth in volume.
Will the flow be slow enough to allow the bubbles to rise/trap in the
I think that's enough for today ;-) I don't need to write another novel.
On 2/4/2004, "S. Hieber" <shieber at yahoo_com> wrote:
>> > -How do I reduce the reverse pressure of the
>Ah. Goofy me. I really missunderstood. You meant how do you
>reduce the head, the resistance to the water flow?
>Use large pipe/tubing, fewer bends, and or a larger
>Or get a nice QuietOne and just "worry" about how much you
>have to turn down the ball valve to restrict the plentiful
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