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
3924 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

what is exat meaning of compentation in RTD ? what diffrent between 2 wire,2 wire and 4 wire RTDs?

2 Answers Atul, Vardhman,

What output voltage the proximity switch shows when it is in open enviornment?

1 Answers

Tell me the field calibration procedure step by step with diagram of temperature transmitter, temperature indicator, flow indicator, level indicator, control valve, thermocouple, pressure indicator (digital & analogue).

1 Answers

what is differnace between radar level tranmitter & hart type tranmitter?

3 Answers

What Is Pre- Commissioning Package +what is DCS & ESD Pre- Commissioning for Instruments Please explain your answer on practical ground base

0 Answers

how can i calibrate I/P converter

4 Answers

How we connect a instrument with ground, Give brief explanation with help of diagram?

0 Answers

Whatis the reset ofset and control system in instrumentation

0 Answers Asyad International Company, CAE, Sugar Factory,

Why in turbine used two critical speed band ?

1 Answers Ankit Metal Power,

I am using Capacitive type level transmitter for measuring oil level in a closed tank (lub oil tank). The txs range is 1500mm, and they do hunt regularly (for about 45mm), can anybody tell what could be the reason??? or any other type level tx that could be used to avoid this?

1 Answers

What is micromotion transmitter? What is the porpose of using this transmitter?

2 Answers Samsung,

What are the error values can accepted in flow transmitter calibration?could u give any formula for this?

0 Answers Hamsco,

For more Instrumentation Interview Questions Click Here