Re: Flow splitting

On 17 Nov 2003 07:34:08 -0800, [EMAIL PROTECTED] (bendel boy) wrote:

>If I have a centrifugal pump, and want to split the flow down two
>pipes, what controllability issues might I have if I use two
>flow-controlled valves, one on each leg?
>
>My first degree-of-freedom analysis indicated that I have two degrees
>of freedom - so I can control the total flow and the flow down one
>leg. But I feel uneasy about this, and have a mental picture of the
>two valves endlessly hunting as they interfere with the upstream
>pressures caused by their operation.
>
>Can anyone offer their thoughts?
>
>Thanks.

Do you just want to split the flow equally to the two pipes?  If so
you only need a restriction orifice in each pipe and a drop across
them, at the normal flow, of about 5 psi.   Or do you want a very
precise split at some ratio other than one-to-one?