How flow control valve is working with pnuematic positioner and I/P convreter f

How flow control valve is working with pnuematic positioner
and I/P convreter from command is given from remote

Question Posted / m k selvam

1 Answers
4585 Views
Ecil, GAIL, I also Faced
E-Mail Answers

How flow control valve is working with pnuematic positioner and I/P convreter from command is given..

Answer / 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

More Instrumentation Interview Questions

How to set up the various advanced process controllers, input the proper parameters, and tune those controllers given related control system information.

1 Answers EID Parry,

how can you change unit of totalizer in siemens mag 5000 flow meter?

2 Answers PowerTech,

i want to calibrate a transmitter in the range of -100 to 300 mmwc. How it is possible to measure -100 to 300?.

2 Answers Hindalco,

why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

19 Answers Honeywell, TCS, TN,

HOW CAN I CONNECT ROSEMOUNT 3300 LEVEL TRANSMITTER TO Allen-Bradley SLC500

1 Answers

what should be minimum length and size of impulse line for steam flow orifice and feed water orifice? asked by sanjay parihar

1 Answers Birla,

what is the procedure of O2 analyser calibration?

3 Answers Thermax,

how in the 2 - wire transmitter, 24v supply and the 4ma signal gets in the same path?

1 Answers Yokogawa,

what do you know about Foundation Fieldbus?

1 Answers CCIE,

THE OUTPUT OF A CURRRENT TRANSMITTER OR A PNEUMATIC TRANSMITTER HAS A LIVE ZERO?EXPLAIN

2 Answers

The pressure class rating (such as 150 lb, 300 lb, etc.) of a line appears in the form of ________________ in the Line Number (or Line Designation) on a P&ID

1 Answers

What is the difference between fiber optic cable & Ethernet cable

2 Answers BEMCO, CCC, Pidilite,

For more Instrumentation Interview Questions Click Here