Answer / nidhi

control valav has mainly three characteristic
1. linear
2. quick opening
3. Equal percentage

Answer / pragati sutar

control valve mainly has 2 characteristics- Install and
inherent. inherent char. further classified as 1.equal %
2.quick opening 3.linear charactaeristics

Answer / s. kanniyappan

1) linear
2) square root
3) quick opening
4) equal percentage
5) parabolic
6) hyperbolic

Answer / sam

The basic char of cv's are
1) Inherent char
2) Installed char

Under Inherent char
a) quick opening
b)Equal percentage
c)linear

Answer / faiyaz

1.Linear
2.Equal percentage
3.Quick opening
4.Square root
5.Hyperbolic

Answer / sukumar

control valve three types of cheracterstics

equal % means give 50% valve opening 35%
liner means give 50% valve opening 50%

quick opening means give 50% valve openig 65%

what are the on/off valve precaution?

1 Answers   Reliance,

Consider a control valve action,the inlet air pressure is only 6 ksc but physically how it can be operate against 100 ksc line fluid pressure?

2 Answers   SCS,

what are the steps I have to deal with?

0 Answers   ONGC,

If a flow transmitter (magnetic type FT) that can measure flow and temperature, then why in some industries people use flow transmitter and temperature transmitter in the same line 1 after another? Even after 1 single flow FT is capable of measuring flow as well as temperature.

1 Answers   Process Control Technologies,

why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

19 Answers   Honeywell, TCS, TN,

what is seebeck effect?

7 Answers  

what is the diffrence between pressure safety valve & pressure relief valve....pls

0 Answers   Oil India,

Please send the all question with answer related for interview.

1 Answers  

how do we commission inergen system?

0 Answers  

I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.

0 Answers  

how can we understand about dcs "bailey infi 90 dcs system" . how its work how signal come from field how it process and how o/p creative by controller. how its cards work.the bsic principle of working of dcs

1 Answers  

How to decrease opening & closing time of on/off valve?

0 Answers   UPL,