in the pipe line if the control valve fails to respond to
controller action,by what means we can stop the flow in the
pipe line ?
Answers were Sorted based on User's Feedback
Answer / renjith
For every control valve there will be option to manually
close the valve by adjusting a screw.
Is This Answer Correct ? | 11 Yes | 1 No |
Answer / priya sharma
u can stop the air supply with the control valve accessory
that is the AIR LOCK
Is This Answer Correct ? | 9 Yes | 0 No |
Answer / nilmaheshin@yahoo.co.in....jit
Chitanya wrote correct answer. Priya and renjith are also
correct. But dear when any body is not present in field at
that time fail safe action is responding
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / karthikeyan
absolutely right answers(1&2)....we can operate in manually,and also to remove the air line because feed water control valve should be a air to open,in this if air fail it should be close....
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / ashwin jain
but wat happen if no 1 is there to control
manually..chetanya's answer is correct....
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / mrmk
Good Suggestion.But if a control valve fail to operate
there may be so many reason.In practical,If you want to
isolate/stop the flow immediately it can be done easily by
closing upstream isolation valve.
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / deepak
if something stuck in control valve then what will u do??
Is This Answer Correct ? | 1 Yes | 0 No |
why? Boiler furnesh pressure transmitter mount in boiler top and it's impulse line is in bottom of the boiler. Aneybody kindly tell me this reason.
How to measure Flow of air line,what is the procedure of creating DP in line to measure Flow!
Why the Proximitor supply should be Negative voltage? Why should not we give Positive voltage to the Transducer?
EXPLAIN PROPOTIONAL INTEGRAL DERIVATIVE CONTROL ACTION?
what is the significance of hook up
HOW WE ARE DECIDING WHILE PROGRAMMING IN PID CONTROLLER THAT WE ARE USING HEATING OR COOLING???????
What is scan time of PLC?
What is the diffrence between digital signal processing and discrete signal processing?
The performance of a pump is monitored by measuring the ________ and _________ pressures
How to do calibration of magnetic flowmeter
How does SmartPlant Instrumentation interface with physical design (3D modeling)?
calibration of instruments.