Answer / faiyaz

ESD means emergency shutdown valve its used in flow line its generally fully open and fully closed its control by the dcs system when plant would need to be maintenance or any thing will happen in side the plant ESD valve will be closed.
PLC stand for programmable logical controller its industrial computer system which is used to monitoring and control the input output system

Please tell me details about Sox,Nox,SWAS analyser????

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How to Calibrate Transducers? Can you give me a step by ste procedure?

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