Answer / u.prabhagaran

outside.for class safety purpose.

how the actually positioner of control valve working? where we gave 3-15psi pressure to I/P converter where it is firstly applied ?- on I/P to positioner then what happen? is control valve operate on 3-15 psi or its bench pressure?

2 Answers  

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Can please tell mi about SIOS, PRM, SERVER, and what is the diference between PIN LAN, PCS LAN,APC Server, and please send the Doc if possible for referance,mail id patil_amit17@yahoo.com

0 Answers  

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Why do we have earthing cable in branch cable and shield in the same cable?

0 Answers   Process Control Technologies,

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Using your own examples solve a problem involving normal table. (experimental method and analysis)

0 Answers  

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In oil & gas industries and petrochemical industries, there are classification of zones like zone 0, zone 1, zone 2. Is there any differences in voltages or power supply supplied for the process instruments, control instruments depending on the zones

1 Answers  

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hello dear i have faced problem in drum level transmitter. the problem is when i engrize the meter meter shows 100% but the actual level 40 or something plz suggest me

7 Answers  

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How we can re-range the DP transmitter, range is -0.5 to 2.0bara. new range is -0.5 to 5 bar

2 Answers   Rosemount,

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What is protocol ?

3 Answers  

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what is sil (safety integrity level

0 Answers   Essar,

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any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.

0 Answers   IOCL,

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Draw a P& ID showing – orifice flange, plate, dp transmitter, isolation & bypass valves and tubing.

0 Answers   CCIE,

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Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

0 Answers  

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