If any control valve create hunting problem, what is the
possible reason and solution?
Answers were Sorted based on User's Feedback
Answer / imran
check as
1-put the controll valv in manual and check incoming signal
if stable then problem in controll valve
2- check positioner condition its feedback link ,incase of
smart poistener check feedback potentiometer.spring and
configration.
3-check diaphragam
4-gland packing
Is This Answer Correct ? | 23 Yes | 0 No |
Answer / bhavesh
check the gland packing,check the positioner o/p is
unstable,check the small leakage on actuator.
Is This Answer Correct ? | 8 Yes | 0 No |
Answer / muhammad arsalan afzal
1=First of all check the feedback link of positioner mostly
such type of problem occur due to feedback link looseness.
2=Gain of the controller is too high you have to adjust it.
3=Gland packing is too tight slightly lose the gland pusher's
screws.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / s.k.bakshi
1. First check the positioner air supply and the positioner.
2. If problem persists tune the PID.
Is This Answer Correct ? | 8 Yes | 7 No |
Answer / suman chakraborty
check I/P signal means I/P and O/P whether the AFR o/p of I/P is stable or not.and check the AI Chanel of I/P.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / dhaval joshi
First check actuator position..removed power from the
actuator...and accordingly connect first power supply
cable,after connect command and feedback cable.
Is This Answer Correct ? | 1 Yes | 6 No |
Give me best instrumentation Books name..Ple...
The wire is disconnected from the fuel gauge sending unit (bimetallic gauge). A voltmeter connected to the wire reads a pulsating 5v. What does this indicate?
what is vibration a part of proceess variable? if vibration is a part variables then how we minimize the actual vibration on machine on load,? vision of instrumentation contrl plz ans me IPGDL interview question
what deference between panel earth and systemearth
Shall we get the reading on level transmitter only by termination,without commissioning?
difference between repeatability and reproductability
What is the role of integral in PID controller
why are use only 4 to 20ma. signal.
What is the difference between sdv and bdv ?
What is meant by GAP VOLTAGE, in vibration measurement. Normally how much GAP VOLTAGE is set and state the reason.
What is megering????
Where is the flow transmitter installed with respect to control valve, state reason.