How flow control valve is working with pnuematic positioner
and I/P convreter from command is given from remote
- 1 Answers
- 3904 Views
- Ecil, GAIL, I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
A controller (the remote device) generates an electronic
4-20mA output signal which tells the valve what its position
should be.
The 4-20mA signal is an input to an I/P
(current-to-pneumatic) transducer, which creates a pneumatic
output signal proportional to the 4-20mA electronic signal
from the controller, probably a 3-15psi pneumatic signal.
The pneumatic control signal is an input to the pneumatic
positioner, which mechanically senses the valve's position.
The positioner drives the actuator with as much supply air
pressure as is necessary to drive the valve to position
demanded by the control signal.
Carl Ellis
Measure First
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
what is the difference between attemperator and desuperheater ?
in differential pressure transmitter,min&max pressure range for hp&lp
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?
What is the use of temprature compensation?
What is Alpha & Beta fctors related to Orifice Plate & its relation with flow?
pls suggest suitable MOC of diaphragm for pressure measurement of UREA grade solution service fluid.
Hi,can anyone help me out with PhD programs related to Instrumentation field?I have a degree in electronic Instrumentation?
Can u tell me the principle of the tc,rtd,level switch,pressure switch ,transmitter(pr flow level temp.),vibration...plz
where cascade loop use ?
what is maxdna ?. explain about the software details.
when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??
why fuse block is not used for AI signal?
what is the process to make control schematic ?
how can leve transmetter calibate in feild .and also put cv and flow plz .....
Linear amplifier.
