Answer / gopalakrishnan

IT IS THE CLOSED LOOP ,TX SIGNAL GOING TO THE CONTROL VALVE
THROUGH THE CONTROLLER (DCS) MARSHALLING PANEL -AND TO THE
FIELD JBS AND TO I/P(CURRENT TO PNEUMATIC CONVERTOR AND
THEN TO THE CONTROL VALVE IT IS THE CONTINOUS PROCESS.

Answer / praveen kumar

Well Transmitter Measures the process, and Control valve
will control and this is closed loop. The loop from
Transmitter to JB to MRack to CP and the signal is 4~20mA
but in Control valve we have I/P where the signal will
converted to Pnuematic ok

Answer / satish

TRANSMITTER WILL GIVEN OUTPUT TO THE CONTROLLER THROUGH
MARSHLLING PANEL THATS CALL PROCESS VALUE,CONTROLLER WILL
GET PROCESS VALUE AS PER CONTROLLER SET POINT THAN FROM
MARSHALLING PANEL THERE IS TWO WIRE/FOUR WIRE SYSTEM AS PER
MARSHALLING CONNECTION OUTPUT WILL GO TO THE CONTROLL VALVE
THAT CALL MANIPLATED VALUE (MV)

difference between null and deflecting instrument.

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Describe the function of Accumulator into the Pump

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plz send me general of ongc

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Galvanizing.

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