what is cavitation in control valve? & how we can avoid it?

1 Answers   Forbes Marshall, Reliance,

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What is the detail function of I/O card in DCS ? Why we dont use the I/O directly with controller?

3 Answers   Kekran Mekran, TCE,

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hay friends, i am in trouble to understand PID controller. several times i have study but it is not clear to me have you a simple way to understand.

1 Answers  

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List three types Level Transmitters with their working principles

1 Answers   ABB, Bapco Bahrain Petroleum Company,

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what r all the closed loop used in boiler? for this related tell some web address..

3 Answers  

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what is the meaning of HART ?

2 Answers  

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There are two chlorination tonners both are connected to two pressure swithes and the pressure switch is connected to SOV which operates the valve to changeover the tonner selection i.e if pressure one tonner goes low the other tonner should come in line if it is inautomatic selection design a circuit using relays ?

0 Answers  

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What is the electronic transmitter frequency.

1 Answers   CPCL, QAFCO,

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Hi Friends i am going to write BARC written test by this month 20th (20-5-2008). So please if any body knows the details about this or having previous question papers pls mail me to kkumarei@gmail.com. For Suggestions give one message to 9962122264

0 Answers   PDIL,

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I want to measure bidirectional steam flow? Kindly suggest me a suitable flow meter. steam is superheated at 41kg/cm2, 350°C

2 Answers  

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what is isolation Transformer???...

3 Answers   Emerson,

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any body pl suggest me the best type of transmitter for level monitoring of a distillation still which consists of highly corrosive and inflammable liquid.closed vessel height=5000mm especially in petrochemical industries

1 Answers  

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