If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , then it will reaches again 50%, this type of action occured frequntly.. so what to do for solve this problem. The possible cause is in volume booster or positioner's relay.. positioner is double acting .. and make siemens..sipart.The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2 Answers   Gujarat Fluorochemicals Limited (GFL), Shell,

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Why the Air Tank Accumulators required for the single acting actuators SDV's or BDV's as I see in some Schematic diagrams of ROTORK ??

2 Answers   L&T, Siemens,

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What is loop checking ?

10 Answers   Kharafi National, Petrofac, Samsung,

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WHAT IS THE DIFFERENCE B/W PLC and DCS

10 Answers   Bhel,

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please give me combustion cntrl interlock details? if possidle drawing also?for this one is there any website ?

1 Answers  

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Can anyone send most commonley asked Instrumentation questions and answers in cement industry please?

0 Answers  

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we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.

0 Answers  

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Before erect the instrument what should you do?

3 Answers   L&T,

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What is the role of P(Protional), I(Integral) and D (Derivative) in PID Controller?

9 Answers  

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what is meant by cold junction compensation. where it is used.

1 Answers   SRACO,

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May I have a brief note above the voltage barriers? Whats is the purpose? Please mail me if you've operational details, mail id: rajkumar.diice@gmail.com

0 Answers  

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What are the advantages and benefits of using PLCs to automate a section of a plant?

2 Answers  

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