Re: Curly One

had a similar prob many years ago, CLient swore we did the flow calcs wrong..
turned out to be welders glove got left in and was sucked to the pump. tHE WRIST SLeeVE
acted like a flapper valve.
Anyway seems to me youre on the right track. ----- Original Message -----
From: "Steve McKenzie" <Mechproj@xtra.co.nz> To: <PipingDesign@yahoogroups.com>
Sent: Thursday, March 17, 2005 2:32 AM
Subject: RE: [PipingDesign] Curly One

>
> Oops
> Ok up to Magflow
> then across 1.5m to offset
> up 0.3m through offset
> across 1.5m to exit
> out the end
>
> sorry bout that chief.
>
> Cheers
>
> Steve
>
> -----Original Message-----
> From: Steve McKenzie [mailto:Mechproj@xtra.co.nz]
> Sent: Thursday, March 17, 2005 10:11 PM
> To: PipingDesign@yahoogroups.com
> Subject: [PipingDesign] Curly One
>
>
>
>
> Gents + 2
>
> Last week I put in a mill feedwater system.
> It is fed from an existing shaky process warer supply. Oversized as per
> my usual practice, but am having severe (zero to 80
> m^3/h) flow fluctuations. The fluctuations are real because I can see
> where the water comes out.
>
> System is:
> Tap into existing horiz 150NB pipe (end of line), vertical.
> Up 150mm to 150NB isol butterfly valve
> Up 150mm to 150X100 reducer.
> Up 1000mm to 100NB butterfly control valve
> Up 1400m to diaphragm 100NB manual regulating valve
> Up 200mm to 100X150 reducer
> Up 200mm to vert/horiz elbow
> Across 3m to magflow.
> Up 300m through offset
> Across 1.5m to elbow
> Across 1.5m to exit
> out the end.
>
> Checked pressure at inlet and it stays within 5%
> Looked at outlet flow and its all over the place, confirmed by
> Magflow. Control valve is software locked so no control generated
> stability problems.
> There is a 100NB branch off the same line drawing 60m^3/h and its
> discharge is steady so its not a supply issue.
> Suspect the guts of the diaphragm valve is loose, and have asked it
> to be pulled out and checked. Also the control valve just to be sure.
> Never had such a problem with such a simple system before.
>
> Any suggestions?
>
> Cheers
>
> Steve
>
>
>
>
>
>
>
>
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Received on Thu Mar 17 13:04:00 2005