I have a Control VAlve having size of 2 ".Only the known parameter is Pressure drop . Its 2 Kg. Then How to calculate control valve sizing means Cv.

0 Answers   JSW,

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Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.

1 Answers  

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i need some objective type questions in instrumentation

0 Answers  

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what is pyrometer? which purpose it has to be used?

2 Answers  

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What is diffrent profibus & OFC Communication

1 Answers   Priya Cement,

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What is zone,loop/fire alarm system?

0 Answers   Emco,

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What is the difference between sdv and bdv ?

1 Answers  

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DCS marshilling Cabinet Power supply can be replace during plant running time?

1 Answers  

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Describe a time when you anticipated potential problems and developed preventive measures.

0 Answers   Hotel Management,

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In 16' pipeline one pcv is installed which is controlled by PT installed at inlet of PCV.If Flowrate in pipeline increases what will happen to pressure at the inlet of pcv.

5 Answers   Essar, vssc,

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Explain the burnout feature.

0 Answers  

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What is shriking and swell effect for a boiler ?

1 Answers  

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