can we use a control valve without positioner

19 Answers  

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how to calibrate and troubleshooting of leveltroll?

0 Answers   Kharafi National,

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HOW TO SOLVE PROBLEM WITH ENRAF LEVEL TRANSMITTER 854 ATG THAT PASSWARD DO NOT Exist INTO TRANSMITTER TO ADJUST LEVEL WITH PORTABLE PET 847, WRITTEN WRONG PASSWORD , I AM SURE THAT DEFAULT PASSWARD (W2=ENRAF2) IS THIS TRANSMITTER NEED TO REPLACE SOFTWARE AND HOW?

0 Answers   Lerco,

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what is meant by turn down ratio?

3 Answers   Avant Garde,

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What is difference between Ionization heat and bimetallic heat

0 Answers   KOC,

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dear friends, i have seen flow as the selection critriea in presure guage (bourdon tube) and i would like to know what is the relation between flow and performance of pressure guage other parameters i found in the data sheet are pressure max. 1ksc temperature max. - 50 deg c line size - 80NB operating range - 1ksc pr. guage range - 0-2 ksc thank u,

0 Answers  

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why use 50% lel methane gas concentration for gas detector calibration instead of 60% lel gas concentration whereas the hi alarm set at 60% lel.

0 Answers   ONGC,

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What inherent design and operating principles are included in a modern control system to use predictive maintenance practices to increase overall system reliability?

0 Answers  

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how its work inductive proximity sensor explain briefly?

1 Answers  

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What is the procedure of DP switch calibration 

2 Answers   NOCL,

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i have an interview in Qatar Petroleum. So please provide the all details abt fire & gas systems

1 Answers   Qatar Petroleums,

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How to work & calculated output of the Derivative action in pid controller (Explain Derivative controller)

0 Answers  

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