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Color Coding In Control Valves

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#1 Batta


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Posted 09 March 2020 - 01:58 AM

Generally it's observed that FC (Fail Close) type Control Valve actuators are painted Red and FO (fail open) type  Control Valve actuators are green ones. What is the objective of this color coding, apart from quick identification at site to avoid mistakes? Are there any Design or Safety related standards or guidelines to follow this color coding?

Edited by Batta, 09 March 2020 - 04:49 AM.

#2 breizh


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Posted 09 March 2020 - 02:23 AM

Hi ,

What do you mean by FC and FO ? failed close and Failed open ?

Apart On/off valves actuated (positioner)  I've never seen Control valves painted …… Red or Green !

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Edited by breizh, 09 March 2020 - 06:39 AM.

#3 Batta


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Posted 09 March 2020 - 04:43 AM

Yes Mr. Breizh, FC & FO means Failed close and Failed open respectively.

I didn't mean to say color for the control valve itself but its Actuator.

Edited by Batta, 09 March 2020 - 04:45 AM.

#4 IGC


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Posted 10 March 2020 - 06:25 AM

That sounds more like a company specification/requirement rather than a code?

#5 Sharma Varun

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Posted 11 March 2020 - 05:39 AM

yes its a company centric approach with sole purpose of quick identification

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