Differential pressure - 2 Way valve

[RODRIGO BR]

Could I measure the differential pressure through the valve (DPv ) by: (DPv ) = Ps – DPcoil - Pr , like showed on the sketch below? Is it correct to measure this way? Or measuring by CBI through the STAD is it possible to measure the DPv ? What’s the right procedure to measure the valve DPv?



https://webmail.emerson.com/OWA/attachment.ashx?id=RgAAAAAkEvAcK8bUEbtkAFCLi%2bHkBwDxUppiGOPTEbsMAFCLi%2bHkAAAAlDZuAACunn7Qi7OoQbPo6 HsUYtNwAADdK7MPAAAJ&attcnt=1&attid0=EACj7FT1xRpSTIUMffZYtsfs
If the DH could be very higher is it necessary to install a modulating relief valve e.g BPV (TA) to reduce the differential pressure by a constant value?




Thanks in advance.

[RODRIGO BR]

9797

Here is the sketch.

[martinw58]

as the pressure drop will prob be low the corect way is through the stad as this can be converted to flow using the corect chart for the valve

[RODRIGO BR]

Martin, First , thank you for your answer,
But the readings through the STAD , Wouldn't be only the differential pressure across the STAD and not the differential pressure through the control valve (V)?


Thanks