Answer / manomallik11

positioner sets the controlvalve stem % open or % close as per command and the position transmitter sends the feedback of % open or % close in control valve to the dcs

Answer / faiyaz ahmad

Positioner is device which is used to given the position of the control valve 25% 50% 75% 100% and Transmitter is send the feed back signal to the DCS.

WHAT IS DIFFERANCE BETWEEN INSTRUMENT AND EQUIPMENT

1 Answers   Lupin,

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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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what is type of protocol used in instrument field to marshalling cabinet cabel. what is the differenance between bus cabel and instrument cabel?

1 Answers   Samsung,

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purpose of absolute ppressure transmitter applcation?

1 Answers  

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What is difference between magnetic flow transmitter & Electromagnetic flow transmitter?

1 Answers  

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what is the zero and span trim?

2 Answers  

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which flow meter is use for measuring the open channel flow?

2 Answers  

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Explain types of valves?

0 Answers  

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WHAT IS THE Differance b/w on/off & pid control valve?

10 Answers  

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WHEN DO WE GO FOR FMCW TYPE RADAR & PW TYPE RADAR ?

1 Answers  

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What is the difference between PLC and DCS?

4 Answers   Honeywell,

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what is the role of proportional in process control?

6 Answers   OGDCL, Trident,

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