Answer / ahmed mostafa

hi thatwill be honour to me to help y

define feed forward control loop with example and drawing?

0 Answers   Honeywell,

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What is the difference between HMI and MMI?

16 Answers  

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Where can i take training in intools software for Instrumentation design??

9 Answers  

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difference between null and deflecting instrument.

5 Answers   ONGC,

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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  

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can any one pl explain me in brief that how we select the leakage classification in valve,means for liquid or gas there is any standard for selecting leakage classification or its depend upon valve size or any any other parameter.

3 Answers  

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What are the questions asked in fresher instrumentation candidates

0 Answers   Polmon,

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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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Explain the combusion chamber

0 Answers   IFFCO,

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can any one tell leakage class in control valve depend on which parameter and there is any specific table or chart for selection of valve leakage class

2 Answers  

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how to explain PID?

2 Answers   Jindal,

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how to use K thermocouple instead E- type without compesation cable

1 Answers  

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