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q_qamar4u
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Join Date: Nov 2010
Location: INDIA
Posts: 19

control valve

03/31/2011 10:19 AM

what is the working principle of positioner in a control valve???

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RDGRNR
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Engineering Fields - Instrumentation Engineering - New Member

Join Date: Dec 2009
Location: San Antonio, TX USA
Posts: 844
Good Answers: 29
#1

Re: control valve

03/31/2011 11:14 AM

Here's what Wiki has to say about control valves. Choose the links that you feel most closely relate to your process.

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Noudge79
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Join Date: Feb 2011
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#2

Re: control valve

03/31/2011 2:10 PM

Valve Positioner sample

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jcchiefeng
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United States - Member - US Citizen - Born & Raised Engineering Fields - Control Engineering - HVAC/R Simplified Using PLC Controls Engineering Fields - Instrumentation Engineering - HVAC/R Simplified Using PLC Controls Engineering Fields - Energy Engineering - HVAC/R Simplified Using PLC Controls

Join Date: Mar 2007
Location: Brick, NJ (USA)
Posts: 110
Good Answers: 5
#3

Re: control valve

04/12/2011 6:49 AM

Simply, it is a feedback device to tell the controller that the signal sent to the valve actuator has set the valve to that signal position. It doesn't care about the process or flow through the valve, just that the signal has been acheived at the actuator and the valve actuator position matches the signal.

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