Manifod Design for LN2

5 comments

Rate

richard_aranda Member Join Date: Sep 2009 Posts: 6	Manifod Design for LN2 09/23/2009 12:39 AM
	I am assigned to design a manifold for LN2. The Scenario is: We have installed 4 outlets of LN2, but we have 5 TEst Handler to be supplied by the LN2. While waiting for the Job Order of the additional outlet for the 5th Test handler, we are using N2 tanks to accomodate the 5th Test Handler. The Problem is, we are encountering downtime during refilling of the tank, once empty. Corrective action is, provide a reserve tank to avoid downtime during the refilling od the first tank. What will be the design of this manifold that will make the switching of the two tanks faster than the manual interchanging of the hoses. Can a Tee or Y Branch solve this problem?
	Register to Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

Anonymous Poster	#1 Re: MAnifod design for LN2 09/23/2009 12:52 AM
	Sure, a couple tees or wyes, and few valves should do the trick.
	Register to Reply

richard_aranda Member Join Date: Sep 2009 Posts: 6	#2 In reply to #1 Re: MAnifod design for LN2 09/23/2009 12:59 AM
	ANY SPECIAL TYPE OR SPECS OF THESE VALVES AND TEES... CAN YOU HELP ME ON THESE, 1/2" THREAD OF OUTLET TO THE TANK.... 2" OF CRYGENIC HOSE.
	Register to Reply

Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#3 Re: MAnifod design for LN2 09/23/2009 2:28 AM
	As you mention, this is cryogenic, so choose valves, fittings, and pipe/tube suited to low temperature. Stainless steel is a likely choice, but check actual temperatures; or verify with the vendor that your components are rated for LN2 service. If you put a tee on your test handler, a valve on each branch of the tee, and a length of hose on each valve (with adapters to match the tank valves), you can switch from a near-empty tank to a full one without any interruption at all. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
	Register to Reply Score 1 for Good Answer

richard_aranda Member Join Date: Sep 2009 Posts: 6	#4 In reply to #3 Re: MAnifod design for LN2 09/23/2009 2:46 AM
	Sir, what if I switch of the first tank, and switch it on after refilling... will there be a problem on the hose, i.e. frozen hose, etc. ... due to presence of ambient air. Do I have to consider something to avoid this ? How can I prevent this?
	Register to Reply

Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#5 Re: MAnifod design for LN2 09/23/2009 3:04 AM
	Hmm... Good question. Unless the hoses are insulated, moisture from the ambient air will freeze onto them. It it is just loose snow, probably not a problem with cryogenic hose. But if it freezes as solid ice, you would have to chip the ice off just to close the valves and disconnect the hose. I don't have personal experience with this; my first reply was just on general principles. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
	Register to Reply

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

Copy to Clipboard

Anonymous Poster (1); richard_aranda (2); Tornado (2)

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (99 right now) Show Members