Interested to Buy Any Domain ? << Click Here >> for more details...
without a positionar can a control valve operate? give the
difference of operating with positionar and without positionar?
- 5 Answers
- 11944 Views
- IOCL, I also Faced
- E-Mail Answers
Answer Posted / sam
There are applications where the positioner is actually
causing the process to run away, due to the valve reacting
being too fast, and the control will be much easier without
the positioner. You can do this by installing a I/P
converter, piped directly to the actuator.
In 99,99% of applications however, the positioner is
necessary to control the process since process changes is
normally very fast and smooth control will be impossible
without a positioner to speed up the reaction time of the
control valve and keeping the process on the desired control
set-point.
In these applications if you do not install a positioner you
will find that your process runs in a big sinuous wave form
and this will obviously cause a major chain reactions
through out the whole plant.
Good luck
| Is This Answer Correct ? | 10 Yes | 1 No |
Post New Answer View All Answers
why direct mounted pressure transmitters is always installed with DBB ( double bleed block) valve in process line or top of the tanks ?
Question on maha cement
explain key exchanges in all security modes WPA,WPA2,TLS?
What is the difference between uv and ir scanners? and what is the workig principle of both
what happen if i increase height of displacer type LT.accuracy or sensitivity are affected.why?
What is the difference between working pressure and calibration pressure of a control valve
it is possible to check the fail safe condition in pressure transmitter. if possible how?
Full form of KKS when use DCS.
what are the diff. in servo and regulatory control?
DEAR SIR/MADAM MY NAME IS ARKAPROVA BHATTACHARYYA.I AM A FRESHER INSTRUMENTATION ENGINEER.CAN YOU PLEASE SEND SOME QUESTION PAPERS OF GRADUATE ENGINEER TRAINEE EXAM OF DVC(DAMODAR VALLY CORPORATION).MY EMAIL IDs ARE arka_aec@rediffmail.com.
hi! i want to know about mpse exam.
please tell me what is a light up procedure of Cfbc boiler and what it's axuillaries of cfbc boiler?
WHAT IS THE DIFF. BETWEEN SKIN TEMPERATURE AND PASSES TEMPERATURE..?
What is voltage regulator?
what effects a surging can produce in the compressor
