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Location For Ro, Before Or After Flow Control Valves


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#1 HnAw

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Posted 31 October 2013 - 02:50 PM

Good day everybody im modeling a line for gravity, no pumps used for water, discharges points area located 42 meters below source tank, discharge are at atmospheric pressure @2700m3h. Thanks at advance, my apologices for my english

#2 fallah

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Posted 31 October 2013 - 02:56 PM

HnAw,

 

Orifice plate (not RO) as a flow element for flow measurement should be located before flow control valve...



#3 HnAw

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Posted 31 October 2013 - 03:00 PM

HnAw,

 

Orifice plate (not RO) as a flow element for flow measurement should be located before flow control valve...

i want to use RO not for measure, its for pressure drop ,  i m looking  cavitation index in the flow control valve is around 1.3 



#4

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Posted 31 October 2013 - 04:10 PM

Hi. I don't get it. Why do you want to use a RO if you know that the discharge is atmospheric??? As Fallah said, you should use a flow element in that case.



#5 HnAw

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Posted 31 October 2013 - 05:35 PM

this is hte model , fullfill pipe ( not a channel) service water for tailing dilution (mining) wiht controlled flow

model.png



#6 fallah

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Posted 01 November 2013 - 01:31 AM   Best Answer

HnAw,

 

The attached model cannot be downloaded, your english cannot clarify your query well...

 

By the way due to gravity flow and atmospheric pressure at downstream, appears it is better the RO to be at control valve's downstream...because if it would be at upstream might cause the tailpipe not to be filled with water in its full cross section... then the control valve cannot do the job well...



#7 HnAw

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Posted 01 November 2013 - 12:20 PM

HnAw,
 
The attached model cannot be downloaded, your english cannot clarify your query well...
 
By the way due to gravity flow and atmospheric pressure at downstream, appears it is better the RO to be at control valve's downstream...because if it would be at upstream might cause the tailpipe not to be filled with water in its full cross section... then the control valve cannot do the job well...


Thank you very much Fallah




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