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  #661 (permalink)  
Old June 12, 2009, 01:24 PM
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Originally Posted by Wall86 View Post
I would also recommend possible contacting the Calgary fire department, see if you can have the whole fire department on hand, "Just in case"

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  #662 (permalink)  
Old June 12, 2009, 02:25 PM
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Originally Posted by encorp View Post
Haha I'm gonna ask for a ham sandwhich in that thing!
lol wow Brain eater it looks like you got some mad skill in this i cant wate to see how it goes
  #663 (permalink)  
Old June 13, 2009, 04:15 PM
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Thx guys !!

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I have finished the Vacuum Dewar ;

Inner tank and outer tank , cleaned and ready :



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It's in 'cure-mode' now.

The keg has a vent hole.I am pumping moist air in through the vacuum connection , the cure by products go out through the vent hole :



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I'll give it 5 days then it's getting hooked up to the pump.........we'll find out if the seals work !!!

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I will be doing the last silicone work on the tank proper tomorrow.

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  #664 (permalink)  
Old June 13, 2009, 07:12 PM
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I'm starting to feel like a nervous father and my wife is about to go into labour!
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DISCLAIMER: The views and opinions expressed in the immediately preceding post are those of encorp and do not reflect the views and/or opinions of family, friends, or anyone remotely associated with encorp unless explicitly stated. encorp does not make any warranty, express or implied, or assumes any liability or responsibility for the quality, factuality or use of information in the immediately preceding post.
  #665 (permalink)  
Old June 14, 2009, 09:17 AM
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Wow!

I can't wait to see you hit the "go" button.

I hope it doesn't blow up your house!
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  #666 (permalink)  
Old June 14, 2009, 06:38 PM
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Heh...aint gonna happen.Now , it's quite possible stuff will fail , but it's not gonna blow up/catch fire etc.....

Remember , this is why all the work on nitrogen atmosphere.No oxygen=no fire.

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I am sitting here enjoying a beer or 5 after a job well done.

The tank proper is 99% complete.

Tape off for back seal :



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Siliconed. :



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What a brutal pita that was.....I was actually swearing during that whole ordeal...silicone like this really isnt meant for potting...Some nice 2000$ a liter silicone potting compound woulda beeen waaaay easier....mebbie next time


I think I did ok tho.....as long as it seals , looks are not important.

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Stainless screws :



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'Wet installation' commencing ; both screws and screw holes have been cleaned with Iso.



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Backplate screws sealed :



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At this point it 'should' be sealed and functional.

I have two last tasks with the tank : seal the inner side bolt holes , and seal the top edge.I should have that done within a day or two.

After a couple days cure time , it's water testing time !!

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And now the $100 question for you aerospace/aircraft guys ;

If all my seals hold , it's cleaning time.

Whats the best way to clean cured silicone off of glass ? (without scratching)

The GE silicone II comes off reasonably well , but damn that rtv157 sure does'nt.

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Last edited by BrainEater; June 14, 2009 at 06:44 PM.
  #667 (permalink)  
Old June 14, 2009, 06:54 PM
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Clean the RTV off the Lexan? Good question. I'll have to ask. Probably MEK.
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  #668 (permalink)  
Old June 14, 2009, 06:59 PM
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Clean the RTV off the Lexan? Good question. I'll have to ask. Probably MEK.
Nope offa the tank glass.....the lexan is the pump housing.

edit : I tried really hard to keep stuff clean but I still got silicone on the glass around the copper n2 lines....really difficult access....

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Last edited by BrainEater; June 14, 2009 at 07:04 PM.
  #669 (permalink)  
Old June 14, 2009, 07:01 PM
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Good, sharp razor blade, again probably some MEK (Methyl-Ethyl-Ketone) - if you can find some. Once hardened, RTV is hard to remove.
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  #670 (permalink)  
Old June 14, 2009, 07:06 PM
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Ok cool...I've got some MEK , I'll giver a shot...thanks !

I'd like to avoid the whole 'razor-blade' thing if I can , I've scratched glass before doing that , but it might be unavoidable.

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