Answer / samir

The Control valves is used for auto loop control of pressure, flow and level. So if we use it's a pressure control valve then desired set point should be pressure of the system. Similarly for LCV & flow control set point is Level & flow respectively. Here should be consider one thing the same CV can't used in three application as because of others parameters are varied to system wise.

Answer / praveen kumar

flow is called the substance of liquid which travels from one point to another point.
pressure is called travelling liquid have a force that is called pressure
level--> travelling liquid finally stacked on single vessel or drum that is vessel....
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Answer / pavan

Controlling is
main..which
parameter we are
going to
controlling.for
example we are
controlling pressue
through valve than
that valve is known
as pressure control
valve as similar also
for other
parameters.

how commission a transmitter evev plant is already running

2 Answers  

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Can we get the outpot in c without using getch fiction? Answer is yes but output will stay on display 4 only few second.... But can we get output without using getch and also output will hold on the display...?

1 Answers  

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i have one absolute pressure transmitter for the range is -400mmhg to 400mmhg. If i do the zero trim at atmosphere the transmitter should be give 4ma or 12ma? which one is correct?

2 Answers  

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what is field bus system. need defination

3 Answers   Takreer,

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what is difference between PLC and DCS?

10 Answers  

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while am calibrating Drager polytron 2IR flame gas detector occured non zero status.how can i get zero status?

0 Answers   Gasco,

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Why would an Engineer consider combining FEEDBACK and FEEDFORWARD control in some applications?

4 Answers   Jindal,

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How will you calibrate PID controller? explain with example.

0 Answers   Jacobs, Sirte Oil Company,

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which transister (npn or pnp) is used in vibration monitoring for negative voltage? 

2 Answers  

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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,

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What is the function of positioner in control valves? does the control valve operate without positioner?

3 Answers   Hofincons,

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Which instrument used to calibrate the pressure switch?

8 Answers  

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