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 is the working principle of hydra step(electronic level indicator)?

2 Answers   Bengal Energy, Lanco,

can you tell me how many stages in steam turbine of 10 MW power plant

2 Answers  

what is o2 analyzer and how it measured ,what is the role of this analyzer in cfbc boiler...

0 Answers   Mittal Steel,

draw the block diagram of a level transmitter ?

0 Answers   Hira Group, Samsung,

one rtd sensor which is connected at middle of distillation column where actual temp. is 100deg but when we tight this sensor at thermowell end it goes down to 90 deg & when remove from the thermowell(but sensor end dipped in well) showing actual reading, what is reason?

3 Answers  

where is a level displacer is used?

9 Answers  

What is Hysteresis mean in Instrument?

11 Answers  

What is the difference between ff transmitter and non ff transmitter

0 Answers   Samsung,

WHICH INSTRUMENT USED TO CALIBRATE CONTROL VALVE?

23 Answers   Exxon Mobil, Honeywell,

Can anybody please let me know Orifice plate sizing calculation formula and step by step procedure

0 Answers  

In control valve there are two type of valve seat we can use metal to metal seat & soft seat.On this valve seat i have following doubt. 1)I have never seen practically the internal assembly of valve so my doubt is that basically weather the seat is soft seat or metal its basic MOC is same as valve body(SS or CS) only in soft seat we are using PTFE ring & place on valve seat & in metal this PTFE ring is not threr am i correct??????? 2)what are the common general rule for using metal to metal seat & soft seat,means its depend on process parameter like liquid,gas, steam & on valve leakage class.

1 Answers  

What is the start up procedure of desalter

0 Answers   Reliance,