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#1 rikakose


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Posted 01 April 2019 - 08:58 AM

we need to modify a piece of the pipe line to use it for pump minimal flow.


There is no much space on the line to add a orifice. The easiest location is at the valve flange.   


The valve is a DN80 ball valve. Will there be any risk or bad consequence ?



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#2 breizh


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Posted 01 April 2019 - 03:34 PM





Consider the link above . Refer to the documents attached with installation requirement , for minimum flow the distances may not be necessary , precision not required  .........  others will comment .



my view 



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Edited by breizh, 02 April 2019 - 12:58 AM.

#3 Chemitofreak


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Posted 02 April 2019 - 03:45 AM



I think your purpose is to kill the pressure and not measure flow on the minimum re-circulation line, hence you should not worry about the minimum upstream and downstream straight length requirement.

#4 rikakose


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Posted 02 April 2019 - 05:59 AM

Many thanks!

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