What is safety barrier and how it is work

2 Answers   IOCL,

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what should be distance from tapping point to inallation place of instruments?

3 Answers   Tasnee Petrochemicals,

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cheapest instru-- PMMC, EDM, rectifier, thermocouple.

3 Answers   ONGC,

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What is two wire system and how it work

2 Answers   Bhel, IFFCO,

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WHAT PRINCIPLE OF GAS ANALYSER( CO,CO2,N2)

2 Answers   Jubilant Organosys,

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What is possitive and negative feedback?

3 Answers   KNPC,

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i am going to attend ongc exam this coming june for Graduate Engineer Trainee post if anybody knows the question pattern or have experience plz share it with me

3 Answers   ONGC,

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What are the different type of instrument used in cement industry with uses

2 Answers   Lafarge,

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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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When cryogenic control valve will be applied?

1 Answers  

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how will you check torque value during Factory acceptance Test for control valve/ESD ON/OFF VALE how will you confirm this torque value is being correct, Which document will you be refer.

0 Answers  

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What is the use of valve positioner?

1 Answers   CCIE,

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