what is the meaning of reverse action and forward action of
control valve...

Answer Posted / hvkkumar,mtech instrumentation

for pressure increases the % of valve opening increase in
direct action .but in case of reverse actoin pressure
increases the % of valve opening decrease.

Is This Answer Correct ?    27 Yes 11 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

how to calculate signal cable sizing? and multipair cable sizing??explain in brief?

1892


How to calibrate Magnetic flow Transmitter in Field

787


can u briefly explain aboutan aryton shunt multirange DC ammeter?

2289


What are continuances of connecting earthing and shield of branch cables (instrument to Junction box), at the same earthing pot provided on JB? Is it ok, or may produce some problem? 

2007


Explain an adaptive / self-tuning controller’s major draw card.

1847






What is the right procedure for adjusting the gap voltage of bently nevada vibration sensor?

14384


How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.

1617


KAlman filter code for two dimension?

1600


What is the GK Value in Flowmeter?

3033


what would be the minimum flow rate that we can measure on rotameter..?

1616


WHAT IS THE CAM POSITION IN CONTROL VALVE POSITIONER ? WHY IT IS USED?

537


plz send me general of ongc

1531


need instrumentation job completed 1 year trainee ship in mnc pesticide company. now in search of job

1467


Meaning of the following a. IOP- Manimum; b. IOP- Maximu,;

1645


What is instrumentation control?

641