why we use 0.2 to 1.0 kg/cm2 output in control valve

Question Posted / abpmdg

4 Answers
14772 Views
GNFC, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

why we use 0.2 to 1.0 kg/cm2 output in control valve..

Answer / pankaj nandasana

As you know....0.2 to 1 kg/cm2 is equal to 3-15 psig..
Generally we are considering this range...reasons are following...

1) Suppose if your have set lower limit at 0 psig, then how you can differentiate zero signal level and pipe breakage..!!!! You can not distinguish two thing..That why we select some elevated range from 0 psig.

2) Our all instrument are producing linear response in the range of 3-15 psig.

3) Pneumatic supply to all instrument is 20 psig..so alway there is bleading of air from instrument..for standardlisation purpose all are considering 3-15 psig..

Is This Answer Correct ?

33 Yes

0 No

why we use 0.2 to 1.0 kg/cm2 output in control valve..

Answer / ashish namdev, bina refinery [

The diaphragm design of all control valves are universal and
the out of the actuators are 3 to 15 psi.When more than the
15 psi pressure is acting to the diaphragm that will lead it
to faulty so we use the 0.2 to 1.0kg/cm2 for control valves.

Is This Answer Correct ?

1 Yes

2 No

why we use 0.2 to 1.0 kg/cm2 output in control valve..

Answer / guest

0.2

Is This Answer Correct ?

1 Yes

6 No

why we use 0.2 to 1.0 kg/cm2 output in control valve..

Answer / s k

because the control valve work within the specified pressure
range of about 0.2 to 1.0 kg/cm2.

Is This Answer Correct ?

2 Yes

8 No

Post New Answer

More Instrumentation Interview Questions

Tell me the field calibration procedure step by step with diagram of temperature transmitter, temperature indicator, flow indicator, level indicator, control valve, thermocouple, pressure indicator (digital & analogue).

1 Answers

explain level transmitter working

1 Answers

what is the formula for changing Range of Transmitter from X mmwc to some Y mmwc with respect to DCS NCMH flow range from x NCMH to y NCMH?

1 Answers HCL,

hi friends,can u send me the link for downloading Allen_bradley_RsLogix_500_Pro_V_7.0 software with activation file.or how can i find activation file for this.

2 Answers

Please any one can provide latest aptitude test,technical test and interview questions for tata consulting engineering (TCE) i need it asap thanks in advance

0 Answers TCE,

what is meant by nuclear collector?

0 Answers

We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.

0 Answers OPaL,

Explain PID controller tuning & any one method used for it.

1 Answers L&T, Oil India,

What is the relation between electronics & instrumentation

2 Answers

What is PID tunning

2 Answers EID Parry, MFL,

cheapest instru-- PMMC, EDM, rectifier, thermocouple.

3 Answers ONGC,

hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....

0 Answers

For more Instrumentation Interview Questions Click Here