without a positionar can a control valve operate? give the difference of operating with positionar and without positionar?

5 Answers   IOCL,

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what is seebeck effect?

7 Answers  

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How to find out the current of two motors having same power consumption but different RPM?

0 Answers  

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What is the difference between conductive lined pipe and conductive unlined pipe? Why do we see that?

0 Answers   Process Control Technologies,

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1)What is the suitable MOC for flow meters working at temperature between 200 - 250 cen. 2)In which application the mass flow meters are not advisable 3)Is it advisable to use radiation type or radar type instrument for non contact application

1 Answers  

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Why hunting will occour in control valve?

6 Answers  

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why we use 4-20 mA to do calibration of the instruments.why we cant use 0-20 mA?

8 Answers   Emerson, IEM,

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protection relay watchdog contact operation?

0 Answers   L&T,

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when the operation engineer told you that he gives the control valve order to open but there is no response ! what will you do ? and if you found that there is astuck , what will you do ? (note : it is apanumatic valve )

5 Answers  

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Pressure transmitter working Principles?

1 Answers  

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what the pid setting in controller

2 Answers  

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What is mean by AC voltage and DC voltage

2 Answers  

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