how pressure reduce through pressure control valve? suppose we have to reduce 20 kg pressure to 10 kg pressure , then what we do ? open the valve or close the valve , initially it is 20 % is upon ( for ur knowledge ).

4 Answers   TATA,

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what is difference between DO and DI

6 Answers  

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Explain about 4 wire instrument concept & tell about its wiring fron sensor in Field to PLC panel.Explain with an example?

3 Answers   IOCL,

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Name and describe at least 4 status indicators, typically found on a PLC

2 Answers  

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what is the difference between RTU & MTU in SCADA system?

4 Answers   Bosch,

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how eddy current loss in probe and induced gap voltage accros probe trip and shaft

1 Answers   Reliance,

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in DCS or PLC we can not put all ai or di,there is calculation through which we can accomodate certain no of digital and analog signal.I need to know that calculation

1 Answers  

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HOW TO CHOOSE FREAQUENCY IN FMCW TYPE RADAR INSTRUMENTS. DESIGN BASIS OR DESIGN CALCULATONS ?

0 Answers   Chevron,

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warning lamp does not light, but it does light when the wire from the lamp going to the sending unit is grounded (the part that plugs into the sending unit) what does this indicate)?

1 Answers  

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CONTROL VALVE OPERATING IN MANUAL BUT NOT IN MANUAL. WHAT SHOULD BE THE PROBLEM ?

0 Answers   GSC,

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What is PID tunning

2 Answers   EID Parry, MFL,

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What is the use instrument barriers? Can you give me review materials about this?

1 Answers  

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