Creating Seal between copper and Polypropylene

sneakerski · 03-30-2003, 10:46 AM

What is the best way to make this seal? I don't have any clue about even the basics of sealing, so any help would be appreciated. Polypropylene is just a non-porous cheapo plastic used in tanks and ducts, and i'm using it as the cap ontop of my copper block. I was thinking either some kind of rubber type material around the edge of it or a adhesive/caulk type material??? Can you point me towards any material names or brands that will help me out? Thanks!

#Rotor · 03-30-2003, 11:05 AM

Marine Goop.... "Sticks like shiate"

sneakerski · 03-30-2003, 11:11 AM

Quote:

Originally posted by #Rotor
Marine Goop.... "Sticks like shiate"

cool, thanks. i assume 3.7 ounces is more than enough, right?

pHaestus · 03-30-2003, 11:28 AM

O ring and bolts also does fine.

hara · 03-31-2003, 07:00 AM

boo

hara · 03-31-2003, 07:01 AM

O ring groove in copper and bolts will seal up to 1000psi if you follow the following guideline:

H=2/3*D
W= 1.18*D to 1.2*D

Where D is the cross sectional diameter of the O ring
H is the depth of the groove
W is the width of the groove

The groove can be cut with a standard endmill, no need for a special cutter.

It actually works:

JFettig · 03-31-2003, 07:01 PM

where did you get that 1000psi number? why dont you try putting 1000psi thru your block, I gaurentee its gonna splode.

as for sealing, marinegoop or rtv silicone and screws works insanely good, another thing that works great is JBweld

Jon

pHaestus · 03-31-2003, 09:12 PM

I just made and used a liquid cell that had to hold water at STP inside a chamber that was UHV (10^-7 torr or so). Just a groove, an o ring, and 4 hex bolts holding it down. Never leaked in 5 days of experiments...

Fixittt · 04-02-2003, 01:19 PM

o-ring and the groove, it works great............

I know this........

HEHEHHEHEHE

hara · 04-02-2003, 02:47 PM

Quote:

Originally posted by JFettig
where did you get that 1000psi number? why dont you try putting 1000psi thru your block, I gaurentee its gonna splode.

as for sealing, marinegoop or rtv silicone and screws works insanely good, another thing that works great is JBweld

Jon

The block would explode because the top is made out of acrylic. If the top were made out of copper It would probably hold. I got that number from cathar.

MeltMan · 04-02-2003, 02:54 PM

O rings are used to seal much higher gas pressures than 1000. However you shouldnt need to be even close to that number.

Ive used standard rubber, urethane, and teflon o-rings to seal above 1400 psi nitrogen pressures.

so 1000 is a low "baseline"...

Fixittt · 04-02-2003, 05:13 PM

Ok, now with that being said, anyone remember the PSI number that the MAZE 2 held before it exploded? And it was a soldered top block.

Come on............ I know some of you guys have to remember.......

MadDogMe · 04-03-2003, 02:37 AM

If you can't old chap, what hope is there for us?!

...

Fixittt · 04-03-2003, 08:16 AM

Oh I remember, it was a big deal on there site, They made a point to advertise that the block could take 1000 psi. I beleive that the bursting point was between 1200 and 1400 psi.....

JFettig · 04-03-2003, 06:42 PM

go to dangerden.com click on the 'tested at 1000+psi' text in the logos and whatnots, It should still be there, They have a video, I think it held at 1400psi for a little bit...

hara · 04-04-2003, 02:08 AM

Do they use soldering or brasing for sealing the maze2 ?

msv · 04-04-2003, 02:27 AM

Quote:

Originally posted by Fixittt
Oh I remember, it was a big deal on there site, They made a point to advertise that the block could take 1000 psi. I beleive that the bursting point was between 1200 and 1400 psi.....

Yep, somewhere around 1300-1350. I watched that video several times. Though it was a Maze1, the ol´ original.
regards
Mikael S.

Fixittt · 04-04-2003, 10:38 AM

I think you all see where I was going with it though...............

that is why I used O-rings from the very beginning.

Cathar · 04-05-2003, 02:03 AM

Hmmm, I've never said 1000PSI for O-rings, I've always said 300+PSI, which is information that I attribute to BillA. I do recall saying about the Loctite 567 thread sealant for barbs which is rated for well over 1000PSI, which is perhaps what's being referred to here.

03-30-2003, 10:46 AM	#1
sneakerski Cooling Neophyte Join Date: Feb 2003 Location: USA Posts: 2	Creating Seal between copper and Polypropylene What is the best way to make this seal? I don't have any clue about even the basics of sealing, so any help would be appreciated. Polypropylene is just a non-porous cheapo plastic used in tanks and ducts, and i'm using it as the cap ontop of my copper block. I was thinking either some kind of rubber type material around the edge of it or a adhesive/caulk type material??? Can you point me towards any material names or brands that will help me out? Thanks!

03-30-2003, 11:05 AM	#2
#Rotor Cooling Savant Join Date: Feb 2002 Location: Dione, sector 4s1256 Posts: 852	Marine Goop.... "Sticks like shiate" __________________ There is no Spoon....

03-31-2003, 07:00 AM	#5
hara Cooling Savant Join Date: Oct 2002 Location: Malta, Mediterranean Posts: 662	boo __________________ - Every great HD crash day is the day before back-up day. - My Past System - "Better to reign in Hell than serve in Heaven." - Milton, Paradise Lost. - FMZ

04-02-2003, 01:19 PM	#9
Fixittt CNC Beyatch Join Date: Aug 2001 Location: Tulsa Spell it backwards Posts: 721	o-ring and the groove, it works great............ I know this........ HEHEHHEHEHE __________________ Creator of the Spir@l Block Longest post ever http://forums.procooling.com/vbb/showthread.php?s=&postid=43808#post43808

04-02-2003, 02:54 PM	#11
MeltMan Cooling Savant Join Date: Aug 2001 Location: KS Posts: 374	O rings are used to seal much higher gas pressures than 1000. However you shouldnt need to be even close to that number. Ive used standard rubber, urethane, and teflon o-rings to seal above 1400 psi nitrogen pressures. so 1000 is a low "baseline"... __________________ MeltMan Lurker Supreme!

03-30-2003, 11:28 AM	#4
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	O ring and bolts also does fine.

03-31-2003, 07:01 PM	#7
JFettig Cooling Savant Join Date: Feb 2003 Location: Willmar MN/Fargo ND Posts: 504	where did you get that 1000psi number? why dont you try putting 1000psi thru your block, I gaurentee its gonna splode. as for sealing, marinegoop or rtv silicone and screws works insanely good, another thing that works great is JBweld Jon

03-31-2003, 09:12 PM	#8
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	I just made and used a liquid cell that had to hold water at STP inside a chamber that was UHV (10^-7 torr or so). Just a groove, an o ring, and 4 hex bolts holding it down. Never leaked in 5 days of experiments...

04-02-2003, 05:13 PM	#12
Fixittt CNC Beyatch Join Date: Aug 2001 Location: Tulsa Spell it backwards Posts: 721	Ok, now with that being said, anyone remember the PSI number that the MAZE 2 held before it exploded? And it was a soldered top block. Come on............ I know some of you guys have to remember....... __________________ Creator of the Spir@l Block Longest post ever http://forums.procooling.com/vbb/showthread.php?s=&postid=43808#post43808

04-03-2003, 02:37 AM	#13
MadDogMe Thermophile Join Date: Aug 2002 Location: Just shut up ;) ... Posts: 1,068	If you can't old chap, what hope is there for us?! ...

04-03-2003, 08:16 AM	#14
Fixittt CNC Beyatch Join Date: Aug 2001 Location: Tulsa Spell it backwards Posts: 721	Oh I remember, it was a big deal on there site, They made a point to advertise that the block could take 1000 psi. I beleive that the bursting point was between 1200 and 1400 psi..... __________________ Creator of the Spir@l Block Longest post ever http://forums.procooling.com/vbb/showthread.php?s=&postid=43808#post43808

04-03-2003, 06:42 PM	#15
JFettig Cooling Savant Join Date: Feb 2003 Location: Willmar MN/Fargo ND Posts: 504	go to dangerden.com click on the 'tested at 1000+psi' text in the logos and whatnots, It should still be there, They have a video, I think it held at 1400psi for a little bit...

04-04-2003, 02:08 AM	#16
hara Cooling Savant Join Date: Oct 2002 Location: Malta, Mediterranean Posts: 662	Do they use soldering or brasing for sealing the maze2 ? __________________ - Every great HD crash day is the day before back-up day. - My Past System - "Better to reign in Hell than serve in Heaven." - Milton, Paradise Lost. - FMZ

04-04-2003, 10:38 AM	#18
Fixittt CNC Beyatch Join Date: Aug 2001 Location: Tulsa Spell it backwards Posts: 721	I think you all see where I was going with it though............... that is why I used O-rings from the very beginning. __________________ Creator of the Spir@l Block Longest post ever http://forums.procooling.com/vbb/showthread.php?s=&postid=43808#post43808

04-05-2003, 02:03 AM	#19
Cathar Thermophile Join Date: Sep 2002 Location: Melbourne, Australia Posts: 2,538	Hmmm, I've never said 1000PSI for O-rings, I've always said 300+PSI, which is information that I attribute to BillA. I do recall saying about the Loctite 567 thread sealant for barbs which is rated for well over 1000PSI, which is perhaps what's being referred to here.

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