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Split Range Control


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#1 sdibyendu

sdibyendu

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Posted 03 February 2019 - 08:32 AM

I'm currently working on a project when in one control application two sets of control valve in parallel has been provided to cater wide range of flow. Can anyone suggest any thumb rule to decide on % split of controller output among those two valve. For reference smaller size valve is designed to cater a flow 0.025 ~ 0.13 mmscmd gas flow whereas bigger one is to manage 0.13 ~ 0.55 mmscmd



#2 breizh

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Posted 03 February 2019 - 09:54 PM

Hi ,

you may find pointers using the link attached .  

https://www.instrume...control-in.html

 

hope this is helping you.

 

Breizh 



#3 latexman

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Posted 04 February 2019 - 07:32 AM

Traditionally, the 4-20 mA output controller is split 4-12 mA (0-100% open) and 12-20 mA (0-100% open).

 

On flow rates may I suggest:

 

0.55/0.025 = 22

(22)1/2 = 4.7

0.025 * 4.7 = 0.12

0.55 / 4.7 = 0.12

So, 0.025-0.12 and 0.12-0.55






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