Hi all good people,
At what condition that we put flow transmitter downstream of the control and what condition we put the flow transmitter upstream of the control valve. Thank you.
|
Posted 23 February 2015 - 09:23 PM
Hi all good people,
At what condition that we put flow transmitter downstream of the control and what condition we put the flow transmitter upstream of the control valve. Thank you.
Posted 23 February 2015 - 10:56 PM
ezralh,
System I in the attached file (flow element at upstream of the control valve) is always preferred, because in system II there is the risk of measuring error due to non smooth moving of the fluid at control valve downstream.
Posted 24 February 2015 - 01:00 AM
Posted 24 February 2015 - 11:44 PM
Hi everyone,
System -1 is always acceptable. As Fluid moves, flow tranmitter will measure & gives signal to accurately take an action for Control Valve. Hence, reading will be correct. There will not be time lag.
System-2 is unacceptable. As fluid moves, to take an action control valve has to wait till signal comes from its downstream side transmitter,
meanwhile some more flow would have passed through control valve. Here, there will be time lag. Hence, control function would not proper response as per desired result.
Your comments are highly appreciated.
Regards,
SPC
Posted 28 February 2015 - 11:18 AM
Can Anyone Provide Me The Reference Datasheet For Deluge Valve?Started by Guest_Radha Krishnan Siva Kumar_* , 16 Apr 2024 |
|
|
||
Flow Switch High RangeStarted by Guest_Lyne_* , 11 Apr 2024 |
|
|
||
Hydrocarbon Dew Point Control UnitStarted by Guest_BabRafiq1_* , 05 Apr 2024 |
|
|
||
Valve Cv InputsStarted by Guest_QuantumEng_* , 01 Apr 2024 |
|
|
||
Kettle Reboiler Flow FractionsStarted by Guest_Lyne_* , 31 Mar 2024 |
|
|