How to get Cv of control valve having following parameter ,i.e inlet pressure 4

How to get Cv of control valve having following parameter
,i.e inlet pressure 4.5kg/cm2
outlet pressure 1 kg/cm2
specific gravity 0.808

Question Posted / abhiic2008

3 Answers
5875 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

How to get Cv of control valve having following parameter ,i.e inlet pressure 4.5kg/cm2 outlet pre..

Answer / mohammad iftikhar

firstly u need to convert the following parametrs
1- conver inlet pressure into PSIG, your outlet pressure
2- you need to know what is your temperature max & min
3- you must know your flow rate
4- diffrential pressure
5- nominal pize size
6- sizing for ....mean for which fluid

Is This Answer Correct ?

1 Yes

2 No

How to get Cv of control valve having following parameter ,i.e inlet pressure 4.5kg/cm2 outlet pre..

Answer / marankrapu

Roughly the Cv is Flow rate (q) divided by square root of
Delta P over fluid sg

Is This Answer Correct ?

0 Yes

1 No

How to get Cv of control valve having following parameter ,i.e inlet pressure 4.5kg/cm2 outlet pre..

Answer / abhiic2008

please provide the calculation form for this

Is This Answer Correct ?

1 Yes

5 No

Post New Answer

More Instrumentation Interview Questions

Furnace draft transmitter range is -50 to +50 mmwc. why the impulse line connected in hp side?

2 Answers Arena,

what is earthing ,grounding in c&i panel?what is the resistance in earthing and grounding of c&i panel?what do u mean by shielding and what is its resistance?

1 Answers

what is mean by hot loop and cold loop testing, whts different between both

2 Answers Honeywell, PDO,

To become an Instrument DESIGN engineer, is there any softwares or training to become Instrument Design engineer, plz suggest me, Iam very much interested in designing.

0 Answers

what is upstream and downstream in liquid flow?

6 Answers Thermax,

Explain about the leakage class of the control valves

0 Answers CCIE,

How digital input and digital output 's are working in dcs

0 Answers BBV, Indiabulls,

how to calculate flow range in DP tx

1 Answers Karnataka Power,

In bently nevada vibration monitoring system,what is the reason to maintain the Resistance of the probe + extension cable equal to 95 ohm? If possible explain the basic principle of measurement with detail electronic circuits.

0 Answers Essar,

Explain bernoulli’s theorem.

0 Answers

Which is your favourite subject & explain any one topic of it.

0 Answers L&T,

Describe how to calibrate various types of instruments and transmitters using ISA industrial consensus standard techniques.

4 Answers Reliance,

For more Instrumentation Interview Questions Click Here