cascade controller is feed back or feed forward or both

4 Answers  

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1.what is the role of proportional comtroller in pid controller?2.How do u calibrate the control valve?

3 Answers   Bently, IOCL,

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when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?

0 Answers  

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What are the characteristics of Control Valve

2 Answers   Ispat,

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Waht is surge in compressors and how to control it?

1 Answers   DEWA,

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Can anyone explain in a simple way the difference between DCS and PLC?

7 Answers   Honeywell,

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What is the use of keyphasor in turbine.

7 Answers   Hindustan Zinc, R&D,

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how in the 2 - wire transmitter, 24v supply and the 4ma signal gets in the same path?

1 Answers   Yokogawa,

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what is difference b/w tube and pipe ?

6 Answers   BSL, Descon, Kirloskar,

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my temperature transmitter in field showing 700 degree , whereas in dcs showing 459 degree, how to resolve this?

4 Answers   ONGC,

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

12 Answers   HTA Instrumentation,

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Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during that if air fail then what will be the condition of valve ( open or close ) ???

4 Answers  

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