http://www.youtube.com/watch?v=oBOqujZXUgI

Practical uses for air guns. LOL.

On Wed, 12 Nov 2014 11:30:35 -0700
"Bob La Londe" wrote:

http://www.youtube.com/watch?v=oBOqujZXUgI

Practical uses for air guns. LOL.

Worth a chuckle. I would just wrap a shop-rag around an awl and push
it through...

You've see Bob's rattle can adapter haven't you?

===
Bob Engelhardt - 12/4/10

My version:
http://home.comcast.net/~bobengelhar...anAdapter2.jpg
===
It has been posted several times. He used it to repressure paint cans
with a propane bottle. Was in this discussion/thread for one:

https://groups.google.com/forum/#!searchin/rec.crafts.metalworking/"spray$20can"$20repressure/rec.crafts.metalworking/t_yer8lTjjo/yE0q-konj6kJ


--
Leon Fisk
Grand Rapids MI/Zone 5b
Remove no.spam for email

On 11/12/2014 3:24 PM, Leon Fisk wrote:
On Wed, 12 Nov 2014 11:30:35 -0700
"Bob La Londe" wrote:

http://www.youtube.com/watch?v=oBOqujZXUgI

Practical uses for air guns. LOL.

Worth a chuckle. I would just wrap a shop-rag around an awl and push
it through...

You've see Bob's rattle can adapter haven't you?

===
Bob Engelhardt - 12/4/10

My version:
http://home.comcast.net/~bobengelhar...anAdapter2.jpg
===
It has been posted several times. He used it to repressure paint cans
with a propane bottle. Was in this discussion/thread for one:

https://groups.google.com/forum/#!searchin/rec.crafts.metalworking/"spray$20can"$20repressure/rec.crafts.metalworking/t_yer8lTjjo/yE0q-konj6kJ


Depress nozzle on can, apply rubber tipped blow gun and add compressed
air. Done.

On 11/12/2014 3:34 PM, Larry Kraus wrote:
On 11/12/2014 3:24 PM, Leon Fisk wrote:
On Wed, 12 Nov 2014 11:30:35 -0700
"Bob La Londe" wrote:

http://www.youtube.com/watch?v=oBOqujZXUgI

Practical uses for air guns. LOL.

Worth a chuckle. I would just wrap a shop-rag around an awl and push
it through...

You've see Bob's rattle can adapter haven't you?

===
Bob Engelhardt - 12/4/10

My version:
http://home.comcast.net/~bobengelhar...anAdapter2.jpg
===
It has been posted several times. He used it to repressure paint cans
with a propane bottle. Was in this discussion/thread for one:

https://groups.google.com/forum/#!searchin/rec.crafts.metalworking/"spray$20can"$20repressure/rec.crafts.metalworking/t_yer8lTjjo/yE0q-konj6kJ



Depress nozzle on can, apply rubber tipped blow gun and add compressed
air. Done.

At least for WD40, oils and solvents. Air might might make paint harden
in the can, so propane might have an advantage there.

On 11/12/2014 12:24 PM, Leon Fisk wrote:
On Wed, 12 Nov 2014 11:30:35 -0700
"Bob La Londe" wrote:

http://www.youtube.com/watch?v=oBOqujZXUgI

Practical uses for air guns. LOL.

Worth a chuckle. I would just wrap a shop-rag around an awl and push
it through...

You've see Bob's rattle can adapter haven't you?

===
Bob Engelhardt - 12/4/10

My version:
http://home.comcast.net/~bobengelhar...anAdapter2.jpg

You can do a similar thing with Butane lighter refill adapters.
I like the lower pressure of Butane.

Could probably do the same thing with "canned air", but I've never
tried it.

I have a dead can of hornet spray. Was all set to put some Butane
in it...then got to thinking how it would feel when the can of poison
exploded in my face.

Some things aren't worth the risk of fixing 'em. ;-)

===
It has been posted several times. He used it to repressure paint cans
with a propane bottle. Was in this discussion/thread for one:

https://groups.google.com/forum/#!searchin/rec.crafts.metalworking/"spray$20can"$20repressure/rec.crafts.metalworking/t_yer8lTjjo/yE0q-konj6kJ

On Wed, 12 Nov 2014 15:38:58 -0500, Larry Kraus
wrote:

On 11/12/2014 3:34 PM, Larry Kraus wrote:
On 11/12/2014 3:24 PM, Leon Fisk wrote:
On Wed, 12 Nov 2014 11:30:35 -0700
"Bob La Londe" wrote:

http://www.youtube.com/watch?v=oBOqujZXUgI

Practical uses for air guns. LOL.

Worth a chuckle. I would just wrap a shop-rag around an awl and push
it through...

You've see Bob's rattle can adapter haven't you?

===
Bob Engelhardt - 12/4/10

My version:
http://home.comcast.net/~bobengelhar...anAdapter2.jpg
===
It has been posted several times. He used it to repressure paint cans
with a propane bottle. Was in this discussion/thread for one:

https://groups.google.com/forum/#!searchin/rec.crafts.metalworking/"spray$20can"$20repressure/rec.crafts.metalworking/t_yer8lTjjo/yE0q-konj6kJ



Depress nozzle on can, apply rubber tipped blow gun and add compressed
air. Done.

At least for WD40, oils and solvents. Air might might make paint harden
in the can, so propane might have an advantage there.

How about using your argon? Everybody has argon around the shop.

--
I started out with nothing and
I still have most of it left!
--anon

On 11/12/2014 3:34 PM, Larry Kraus wrote:
Depress nozzle on can, apply rubber tipped blow gun and add compressed
air. Done.


The advantage of propane is that it's liquid and maintains a constant
pressure that is its vapor pressure. Until the very end, of course.
With air, or any gas, the pressure will decrease as it's used.

Bob

"Bob Engelhardt" wrote in message
...
On 11/12/2014 3:34 PM, Larry Kraus wrote:
Depress nozzle on can, apply rubber tipped blow gun and add
compressed
air. Done.


The advantage of propane is that it's liquid and maintains a
constant pressure that is its vapor pressure. Until the very end,
of course. With air, or any gas, the pressure will decrease as it's
used.

Bob

The disadvantage is that its pressure depends on how well it dissolves
in the liquid in the can, and the relative quantities of product and
propane which you can't easily determine or control.
http://en.wikipedia.org/wiki/Raoult's_law
"If a non-volatile solute (zero vapor pressure, does not evaporate) is
dissolved into a solvent to form an ideal solution, the vapor pressure
of the final solution will be lower than that of the pure solvent."

If it doesn't dissolve the pressure may exceed 200 PSI.
http://www.engineeringtoolbox.com/pr...re-d_1020.html

-jsw

On 11/13/2014 6:54 AM, Jim Wilkins wrote:

"Bob Engelhardt" wrote in message
The advantage of propane is that it's liquid and maintains a
constant pressure that is its vapor pressure. ...


The disadvantage is that its pressure depends on how well it dissolves
in the liquid in the can, ...


I had never thought about that. Yet, you're putting 2 liquids in a can,
one could dissolve in the other. But it's moot if the original
propellant was propane, which I assume it was. Moot because you're just
doing what the factory did.

Bob

On 11/13/2014 4:13 PM, Bob La Londe wrote:

That holds true with C02 as well, but pressure does fluctuate with
temperature.

Well, yeah but ... the vapor pressure of CO2 at room temperature is
about 900 psi, IIRC. Whereas for propane it's 100 psi, again IIRC.

"Bob Engelhardt" wrote in message
...
On 11/13/2014 4:13 PM, Bob La Londe wrote:

That holds true with C02 as well, but pressure does fluctuate with
temperature.

Well, yeah but ... the vapor pressure of CO2 at room temperature is
about 900 psi, IIRC. Whereas for propane it's 100 psi, again IIRC.


The vapor pressure of CO2 dissolved in soda water is much lower, as is
that of acetylene dissolved in acetone. Unless you make a connecting
hose with a pressure gauge and shutoff valve you don't know how much
pressure the can should have, or how much you are adding.

When I did this in college I tested the pressure by denting the can
with my thumb, which I can just barely do at the original factory
pressure. I used a little fitting that jammed into the stem of one can
and sealed with a taper in the stem of the other, and pressed them
together with the butane on top.

On Wed, 12 Nov 2014 16:37:23 -0800, Larry Jaques
wrote:

On Wed, 12 Nov 2014 15:38:58 -0500, Larry Kraus
wrote:

On 11/12/2014 3:34 PM, Larry Kraus wrote:
On 11/12/2014 3:24 PM, Leon Fisk wrote:
On Wed, 12 Nov 2014 11:30:35 -0700
"Bob La Londe" wrote:

http://www.youtube.com/watch?v=oBOqujZXUgI

Practical uses for air guns. LOL.

Worth a chuckle. I would just wrap a shop-rag around an awl and push
it through...

You've see Bob's rattle can adapter haven't you?

===
Bob Engelhardt - 12/4/10

My version:
http://home.comcast.net/~bobengelhar...anAdapter2.jpg
===
It has been posted several times. He used it to repressure paint cans
with a propane bottle. Was in this discussion/thread for one:

https://groups.google.com/forum/#!searchin/rec.crafts.metalworking/"spray$20can"$20repressure/rec.crafts.metalworking/t_yer8lTjjo/yE0q-konj6kJ



Depress nozzle on can, apply rubber tipped blow gun and add compressed
air. Done.

At least for WD40, oils and solvents. Air might might make paint harden
in the can, so propane might have an advantage there.

How about using your argon? Everybody has argon around the shop.
I'm still entranced by the fact that I have air at 100psi!
---

Gerry :-)}
London,Canada