What is surge and how is it prevented, what is the purpose of bypass valve across AS valve.

0 Answers   ADMA OPCO,

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What is the use of keyphasor in turbine.

7 Answers   Hindustan Zinc, R&D,

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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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what is difference between 3 wire and 4 wire RTD sensor?

12 Answers   HTA Instrumentation,

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why we use the 4-20 mamp signal used for transmitter.

5 Answers   Tecnimont,

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what is cavitation ?

7 Answers  

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what is the input of ph sensor and meter during the calibration time and what is the output?

1 Answers   Sabic,

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what does mean by analog output trim and where this one used for?

1 Answers  

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what is the different between plc and dcs ? I know full name of this two but I want to know what structure and working style and speed I/O capacity and controller difference?

2 Answers   L&T,

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What is the load line in control valve?

1 Answers   IFFCO,

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What is ptw and write 3 types of ptw?

5 Answers   Emco,

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all types instrumentation questions want

0 Answers   Bhel, Descon, HBL Power Systems,

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