Root Valve

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moheshams Associate Join Date: May 2008 Posts: 26	Root Valve 06/22/2008 9:31 AM
	Dear Experts Have you ever heard about "ROOT VALVE"?Is this word a type of valve or specially shows an application of valve?In the other words can a globe or gate valve or something else can be a root valve as well? It hardly could be find certain information about it by valve maker but some valves actually named "root valves " in the power plants. THANKS in advance
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#2 "Re: Root Valve" by PennPiper on 06/22/2008 4:15 PM (score 2)
#6 "Re: Root Valve" by srini on 06/23/2008 9:04 AM (score 2)

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#1 "Re: Root Valve" by Steve S. on 06/22/2008 9:57 AM (score 1)
#9 "Re: Root Valve" by Kwetz on 09/09/2009 4:36 AM (score 1)

Steve S. Guru Join Date: Aug 2007 Posts: 1790 Good Answers: 87	#1 Re: Root Valve 06/22/2008 9:57 AM
	In engineering, the same term is often applied to many different things, so I would suggest that you give some more specifics about your industry, your application, and why you are asking the question. Are you working in a power plant? But a simple google search on "root valve" revealed at least this application for your consideration.. http://www.centuryvalve.com/rootvalves.asp
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Anonymous Poster	#4 In reply to #1 Re: Root Valve 06/23/2008 6:55 AM
	Hi Thanks for your answer . The valve I encountered is an isolation valve in a high pressure hydraulic system.As the system is a gas turbine control unit and resultly very important I would like to find the exact characteristic of that.the only word impressed on the valve is "Root valve" (possibly) made by "exco".Unfortunatly there isnt any other information about the valve. Rethanks
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#5
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Re: Root Valve

06/23/2008 6:58 AM

Thanks for your answer . The valve I encountered is an isolation valve in a high pressure hydraulic system.As the system is a gas turbine control unit and resultly very important I would like to find the exact characteristic of that.the only word impressed on the valve is "Root valve" (possibly) made by "exco".Unfortunatly there isnt any other information about the valve.

PennPiper Guru Join Date: Feb 2007 Location: Bayonet Point, Florida Posts: 635 Good Answers: 61	#2 Re: Root Valve 06/22/2008 4:15 PM
	"Root Valve" is a common term used in an oil refinery or other type of process plant as a generalization for a valve that, by its placement is the primary shut-off valve for a sub-header leaving a main header. The "Root" has more to do with the placement or location rather than the type of valve. In a Cooling Water system the Root valve might be a Gate valve or a Butterfly valve. In a Steam system the Root valve would normally be a Gate valve. I have never seen a Globe valve used as a Root valve. __________________ Do it once and do it right
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bwire Guru Join Date: Dec 2007 Location: Upper Mid-west USA Posts: 7498 Good Answers: 97	#3 In reply to #2 Re: Root Valve 06/23/2008 1:58 AM
	GA __________________ If death came with a warning there would be a whole lot less of it.
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tranvietnga1905 Participant Join Date: Aug 2008 Posts: 1	#12 In reply to #2 Re: Root Valve 03/16/2015 10:44 PM
	Dear Piper, Can you explain why root valve shall be located MINIMUM from header as process requirement? Do you have wrong mechanical impact on system that break/ harm to piping system when root valve not followed process requirement about Minimum location? Thanks.
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srini Power-User Join Date: Mar 2008 Location: Houston, Texas Posts: 101 Good Answers: 6	#6 Re: Root Valve 06/23/2008 9:04 AM
	In instrumentation ,the term root valve is used to designate the valve which isolates the instrument from the process and is close to the process line. For example in a flow transmitter mounted at around four ft or so from ground ,the valves connected to the orifice flange taps at a higher elevation is called the root valve. At the transmitter you have another pair of isolation valves. __________________ If you don't know where you are going,you are bound to get there
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Kwetz Guru Join Date: Oct 2007 Location: Madrid, Spain Posts: 716 Good Answers: 25	#7 In reply to #6 Re: Root Valve 06/24/2008 3:20 AM
	Yes, and most of them are globe type. So it seems evident that the term is more related to the "position/use" than to the valve type. Best regards __________________ It's stupid to discuss about AI: We´ve reached by the "B" way. We' ve producing men as clever as machines.
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arihant Participant Join Date: Sep 2009 Location: India Posts: 2	#8 Re: Root Valve 09/09/2009 2:25 AM
	As per Kwetz Instrumentation Isolation valves have to be globe valve(mostly).Why so?why cant we use gate valve instead?. Is it because pressure loss across a gate valve is more than a corresponding globe valve? thanks.
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Kwetz Guru Join Date: Oct 2007 Location: Madrid, Spain Posts: 716 Good Answers: 25	#9 In reply to #8 Re: Root Valve 09/09/2009 4:36 AM
	This is the definition of "root valve" according to ANSI/ISA S67.02.01: *root valve:* the first valve located on the instrument-sensing/sample line after it taps off the main process. As these lines have usually a small size, the most common are that globe type. Kind regards __________________ It's stupid to discuss about AI: We´ve reached by the "B" way. We' ve producing men as clever as machines.
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moheshams Associate Join Date: May 2008 Posts: 26	#11 In reply to #9 Re: Root Valve 09/12/2009 3:53 AM
	Althoug a little late but;"The more documentary,the better answer." Thanks
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arihant Participant Join Date: Sep 2009 Location: India Posts: 2	#10 Re: Root Valve 09/09/2009 4:44 AM
	Thanks Kwetz
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khadimali Participant Join Date: Jun 2018 Posts: 3	#13 Re: Root Valve 06/04/2018 2:59 PM
	An instrument root valve is utilized for isolation of pressure measures, orifice plates, flush rings and different measurement instruments. The instrument valve typically "lives" in the vacant position and is close just to isolate the instrument for administration or replacement. in this way the valve sees not very many cycles over its life. The instrument root valve is produced using created or cast material and is welded to avert detachment of the body and end, in this manner the valve is non-repairable and is supplanted when required. May clarksol.com help you to learn more about different kinds of valves.
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