Quick Operating Steam Valve - CR4 Discussion Thread

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Anonymous Poster #1	Quick Operating Steam Valve 09/08/2011 1:15 PM
	How to operate an Posi seal butterfly valve which is an quick operating steam shut valve.
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#1 Re: Mechanical 09/08/2011 1:45 PM
	Turn the handle 90°, but if there is the possibility of liquid hammer, do it slowly. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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SHIVARAM Participant Join Date: Jan 2011 Location: Vadodara Posts: 1	#2 In reply to #1 Re: Mechanical 09/08/2011 2:01 PM
	THIS IS A SOLENOID OPERATED VALVE USED IN STEAM TURBINE __________________ Shiva
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#6 In reply to #2 Re: Mechanical 09/09/2011 4:00 AM
	OK. Tell the original poster. Only please do it quietly. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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PennPiper Guru Join Date: Feb 2007 Location: Bayonet Point, Florida Posts: 635 Good Answers: 61	#3 Re: Mechanical 09/08/2011 2:21 PM
	Before this goes any further, what is the line size where this valve is located? What is the Flange Rating and Material of this line? What is the maximum operating pressure and temperature of this Steam? Why are you using (or proposing to use) a Butterfly Valve? Is this valve going to be used for tight shut-off? Is this valve going to be used for Throttling? __________________ Do it once and do it right
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pipeit Power-User Join Date: Dec 2007 Posts: 142 Good Answers: 1	#4 Re: Mechanical 09/08/2011 3:23 PM
	Using a Butterfly valve on steam is a bad idea. They aren't the best for other applications let alone steam IMO.
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CONWAYMECH Power-User Join Date: May 2006 Posts: 142 Good Answers: 3	#5 Re: Quick Operating Steam Valve 09/08/2011 10:35 PM
	Butterfly valves don't throttle turbines or any steam function. If you are controlling steam to a turbine the 1st consideration is preventing rapid depressurization of your steam generator, the second would be acceleration ( mini-maxi) and governing the speed would be the final. If you are actually running a steam turbine with a butterfly, stop and call an engineer.
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Users who posted comments:

CONWAYMECH (1); PennPiper (1); pipeit (1); PWSlack (1); SHIVARAM (1); Tornado (1)

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