On drum level, why we are using air to close Control valve?

4 Answers   L&T,

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Give Detail information about plc,dcs,and scada system?

0 Answers  

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Why we are using sqare root in flow?

4 Answers  

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what is temperature compensation?

1 Answers  

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

1 Answers  

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How a rtd work, and what volts/current goes to a RTD to measure the resistence?

1 Answers   DVC,

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where the use of direct action control valve?

2 Answers  

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Example of dry contacts & wet contacts?

3 Answers  

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Define cryogenic?

0 Answers  

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Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?

0 Answers   Process Control Technologies,

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We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

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how to explain PID?

2 Answers   Jindal,

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